Cisco 300-115

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Question 1 of 104

QUESTION NO: 1
What is the maximum number of switches that can be stacked using Cisco StackWise?

Select one of the following:

Explanation

Question 2 of 104

A network engineer wants to add a new switch to an existing switch stack. Which configuration
must be added to the new switch before it can be added to the switch stack?

Select one of the following:

No configuration must be added.
stack ID
IP address
VLAN information
VTP information

Explanation

Question 3 of 104

What percentage of bandwidth is reduced when a stack cable is broken?

Select one of the following:

Explanation

Question 4 of 104

Refer to the exhibit.

Which set of configurations will result in all ports on both switches successfully bundling into an
EtherChannel?

Select one of the following:

switch1channel-group 1 mode active switch2channel-group 1 mode auto
switch1channel-group 1 mode desirable switch2channel-group 1 mode passive
switch1channel-group 1 mode on switch2channel-group 1 mode auto
switch1channel-group 1 mode desirableswitch2channel-group 1 mode auto

Explanation

Question 5 of 104

Refer to the exhibit.
How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is
received or transmitted in VLAN 10 on the GigabitEthernet0/1 port?

Select one of the following:

Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10
Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10.
Apply the monitor session filter globally to allow only traffic from VLAN 10
Change the monitor session source to VLAN 10 instead of the physical interface

Explanation

Question 6 of 104

Refer to the exhibit.
A network engineer wants to analyze all incoming and outgoing packets for an interface that is
connected to an access switch. Which three items must be configured to mirror traffic to a packet
sniffer that is connected to the distribution switch? (Choose three.)

Select one or more of the following:

A monitor session on the distribution switch with a physical interface as the source and the remote
SPAN VLAN as the destination
A remote SPAN VLAN on the distribution and access layer switch
A monitor session on the access switch with a physical interface source and the remote SPAN
VLAN as the destination
A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical
interface as the destination
A monitor session on the access switch with a remote SPAN VLAN source and the physical
interface as the destination
A monitor session on the distribution switch with a physical interface as the source and a physical
interface as the destination

Explanation

Question 7 of 104

After an EtherChannel is configured between two Cisco switches, interface port channel 1 is in the
down/down state. Switch A is configured with channel-group 1 mode active, while Switch B is
configured with channel-group 1 mode desirable. Why is the EtherChannel bundle not working?

Select one of the following:

The switches are using mismatched EtherChannel negotiation modes.
The switch ports are not configured in trunking mode.
LACP priority must be configured on both switches.
The channel group identifier must be different for Switch A and Switch B.

Explanation

Question 8 of 104

An EtherChannel bundle has been established between a Cisco switch and a corporate web
server. The network administrator noticed that only one of the EtherChannel links is being utilized
to reach the web server. What should be done on the Cisco switch to allow for better
EtherChannel utilization to the corporate web server?

Select one of the following:

Enable Cisco Express Forwarding to allow for more effective traffic sharing over the EtherChannel
bundle.
Adjust the EtherChannel load-balancing method based on destination IP addresses.
Disable spanning tree on all interfaces that are participating in the EtherChannel bundle.
Use link-state tracking to allow for improved load balancing of traffic upon link failure to the server.
Adjust the EtherChannel load-balancing method based on source IP addresses.

Explanation

Question 9 of 104

Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. This command
is configured globally:
monitor session 2 filter vlan 1 – 8, 39, 52
What is the result of the implemented command?

Select one of the following:

All VLAN traffic is sent to the SPAN destination interface.
Traffic from VLAN 4 is not sent to the SPAN destination interface.
Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs.
The trunk’s native VLAN must be changed to something other than VLAN 1.
Traffic from VLANs 1 to 8, 39, and 52 is replicated to the SPAN destination port.

Explanation

Question 10 of 104

A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the
diagram that is provided. The engineer notices only a single neighbor that uses Cisco Discovery
Protocol, but it has several routing neighbor relationships. What would cause the output to show
only the single neighbor?

Select one of the following:

The routers are connected via a Layer 2 switch
IP routing is disabled on neighboring devices.
Cisco Express Forwarding is enabled locally.
Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices.

Explanation

Question 11 of 104

After the implementation of several different types of switches from different vendors, a network
engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible.
Which vendor-neutral protocol could be used to resolve this issue?

Select one of the following:

Local Area Mobility
Link Layer Discovery Protocol
NetFlow
Directed Response Protocol

Explanation

Question 12 of 104

Several new switches have been added to the existing network as VTP clients. All of the new
switches have been configured with the same VTP domain, password, and version. However,
VLANs are not passing from the VTP server (existing network) to the VTP clients. What must be
done to fix this?

Select one of the following:

Remove the VTP domain name from all switches with "null" and then replace it with the new
domain name.
Configure a different native VLAN on all new switches that are configured as VTP clients.
Provision one of the new switches to be the VTP server and duplicate information from the existing
network.
Ensure that all switch interconnects are configured as trunks to allow VTP information to be
transferred.

Explanation

Question 13 of 104

After implementing VTP, the extended VLANs are not being propagated to other VTP switches.
What should be configured for extended VLANs?

Select one of the following:

VTP does not support extended VLANs and should be manually added to all switches.
Enable VTP version 3, which supports extended VLAN propagation.
VTP authentication is required when using extended VLANs because of their ability to cause
network instability.
Ensure that all switches run the same Cisco IOS version. Extended VLANs will not propagate to
different IOS versions when extended VLANs are in use.

Explanation

Question 14 of 104

Switch A, B, and C are trunked together and have been properly configured for VTP. Switch C
receives VLAN information from the VTP server Switch A, but Switch B does not receive any
VLAN information. What is the most probable cause of this behavior?

Select one of the following:

Switch B is configured in transparent mode.
Switch B is configured with an access port to Switch A, while Switch C is configured with a trunk
port to Switch B.
The VTP revision number of the Switch B is higher than that of Switch A.
The trunk between Switch A and Switch B is misconfigured.

Explanation

Question 15 of 104

Refer to the exhibit.
Cisco 300-115 Exam
"Pass Any Exam. Any Time." - www.actualtests.com 18
Switch A, B, and C are trunked together and have been properly configured for VTP. Switch B has
all VLANs, but Switch C is not receiving traffic from certain VLANs. What would cause this issue?

Select one of the following:

A VTP authentication mismatch occurred between Switch A and Switch B.
The VTP revision number of Switch B is higher than that of Switch A.
VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface
that is connected to Switch C.
The trunk between Switch A and Switch B is misconfigured

Explanation

Question 16 of 104

After the recent upgrade of the switching infrastructure, the network engineer notices that the port
roles that were once “blocking” are now defined as “alternate” and “backup.” What is the reason
for this change?

Select one of the following:

The new switches are using RSTP instead of legacy IEEE 802.1D STP.
IEEE 802.1D STP and PortFast have been configured by default on all newly implemented Cisco
Catalyst switches.
The administrator has defined the switch as the root in the STP domain.
The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco
Catalyst switches.

Explanation

Question 17 of 104

An administrator recently configured all ports for rapid transition using PortFast. After testing, it
has been determined that several ports are not transitioning as they should. What is the reason for
this?

Select one of the following:

RSTP has been enabled per interface and not globally.
The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode.
STP is unable to achieve rapid transition for trunk links.
The switch does not have the processing power to ensure rapid transition for all ports.

Explanation

Question 18 of 104

Which technique automatically limits VLAN traffic to only the switches that require it?

Select one of the following:

access lists
DTP in nonegotiate
VTP pruning
PBR

Explanation

Question 19 of 104

What effect does the mac address-table aging-time 180 command have on the MAC addresstable?

Select one of the following:

This is how long a dynamic MAC address will remain in the CAM table.
The MAC address-table will be flushed every 3 minutes.
The default timeout period will be 360 seconds.
ARP requests will be processed less frequently by the switch.
The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes.

Explanation

Question 20 of 104

While working in the core network building, a technician accidently bumps the fiber connection
between two core switches and damages one of the pairs of fiber. As designed, the link was
placed into a non-forwarding state due to a fault with UDLD. After the damaged cable was
replaced, the link did not recover. What solution allows the network switch to automatically recover
from such an issue?

Select one of the following:

macros
errdisable autorecovery
IP Event Dampening
command aliases
Bidirectional Forwarding Detection

Explanation

Question 21 of 104

A network engineer deployed a switch that operates the LAN base feature set and decides to use
the SDM VLAN template. The SDM template is causing the CPU of the switch to spike during
peak working hours. What is the root cause of this issue?

Select one of the following:

The VLAN receives additional frames from neighboring switches.
The SDM VLAN template causes the MAC address-table to overflow
The VLAN template disables routing in hardware.
The switch needs to be rebooted before the SDM template takes effect.

Explanation

Question 22 of 104

An access switch has been configured with an EtherChannel port. After configuring SPAN to
monitor this port, the network administrator notices that not all traffic is being replicated to the
management server. What is a cause for this issue?

Select one of the following:

VLAN filters are required to ensure traffic mirrors effectively.
SPAN encapsulation replication must be enabled to capture EtherChannel destination traffic.
The port channel can be used as a SPAN source, but not a destination.
RSPAN must be used to capture EtherChannel bidirectional traffic.

Explanation

Question 23 of 104

Refer to the exhibit.
What is the result of the configuration?

Select one of the following:

The EtherChannels would not form because the load-balancing method must match on the
devices.
The EtherChannels would form and function properly even though the load-balancing and
EtherChannel modes do not match.
The EtherChannels would form, but network loops would occur because the load-balancing
methods do not match.
The EtherChannels would form and both devices would use the dst-ip load-balancing method
because Switch1 is configured with EtherChannel mode active.

Explanation

Question 24 of 104

A network engineer tries to configure storm control on an EtherChannel bundle. What is the result
of the configuration?

Select one of the following:

The storm control settings will appear on the EtherChannel, but not on the associated physical
ports.
The configuration will be rejected because storm control is not supported for EtherChannel.
The storm control configuration will be accepted, but will only be present on the physical
interfaces.
The settings will be applied to the EtherChannel bundle and all associated physical interfaces.

Explanation

Question 25 of 104

What is the function of NSF?

Select one of the following:

forward traffic simultaneously using both supervisors
forward traffic based on Cisco Express Forwarding
provide automatic failover to back up supervisor in VSS mode
provide nonstop forwarding in the event of failure of one of the member supervisors

Explanation

Question 26 of 104

After UDLD is implemented, a Network Administrator noticed that one port stops receiving UDLD
packets. This port continues to reestablish until after eight failed retries. The port then transitions
into the errdisable state. Which option describes what causes the port to go into the errdisable
state?

Select one of the following:

Normal UDLD operations that prevent traffic loops.
UDLD port is configured in aggressive mode.
UDLD is enabled globally.
UDLD timers are inconsistent.

Explanation

Question 27 of 104

After reviewing UDLD status on switch ports, an engineer notices that the switch LEDs are green.
Which statement describes what this indicates about the status of the port?

Select one of the following:

The port is fully operational and no known issues are detected.
The bidirectional status of “unknown” indicates that the port will go into the disabled state because
it stopped receiving UDLD packets from its neighbor.
UDLD moved into aggressive mode after inconsistent acknowledgements were detected.
The UDLD port is placed in the “unknown” state for 5 seconds until the next UDLD packet is
received on the interface.

Explanation

Question 28 of 104

Pilot testing of the new switching infrastructure finds that when the root port is lost, STP
immediately replaces the root port with an alternative root port. Which spanning-tree technology is
used to accomplish backup root port selection?

Select one of the following:

PVST+
PortFast
BackboneFast
UplinkFast
Loop Guard
UDLD

Explanation

Question 29 of 104

A network engineer must adjust the STP interface attributes to influence root port selection. Which
two elements are used to accomplish this? (Choose two.)

Select one or more of the following:

port-priority
cost
forward-timers
link type
root guard

Explanation

Question 30 of 104

A network engineer must set the load balance method on an existing port channel. Which action
must be done to apply a new load balancing method?

Select one of the following:

Configure the new load balancing method using port-channel load-balance
Adjust the switch SDM back to “default”.
Ensure that IP CEF is enabled globally to support all load balancing methods.
Upgrade the PFC to support the latest load balancing methods.

Explanation

Question 31 of 104

Refer to the exhibit.
A network engineer investigates a recent network failure and notices that one of the interfaces on
the switch is still down. What is causing the line protocol on this interface to be shown as down?

Select one of the following:

There is a layer 1 physical issue.
There is a speed mismatch on the interface.
The interface is configured as the target of the SPAN session.
The interface is configured as the source of the SPAN session.
There is a duplex mismatch on the interface.

Explanation

Question 32 of 104

While doing network discovery using Cisco Discovery Protocol, it is found that rapid error tracking
is not currently enabled. Which option must be enabled to allow for enhanced reporting
mechanisms using Cisco Discovery Protocol?

Select one of the following:

Cisco Discovery Protocol version 2
Cisco IOS Embedded Event Manager
logging buffered
Cisco Discovery Protocol source interface
Cisco Discovery Protocol logging options

Explanation

Question 33 of 104

Which technique allows specific VLANs to be strictly permitted by the administrator?

Select one of the following:

VTP pruning
transparent bridging
trunk allowed VLANs
VLAN access-list
L2P tunneling

Explanation

Question 34 of 104

For security reasons, the IT manager has prohibited users from dynamically establishing trunks
with their associated upstream switch. Which two actions can prevent interface trunking? (Choose
two.)

Select one or more of the following:

Configure trunk and access interfaces manually.
Disable DTP on a per interface basis.
Apply BPDU guard and BPDU filter.
Enable switchport block on access ports.

Explanation

Question 35 of 104

Which two protocols can be automatically negotiated between switches for trunking? (Choose
two.)

Select one or more of the following:

PPP
DTP
ISL
HDLC
DLCI
DOT1Q

Explanation

Question 36 of 104

A network is running VTPv2. After verifying all VTP settings, the network engineer notices that the
new switch is not receiving the list of VLANs from the server. Which action resolves this problem?

Select one of the following:

Reload the new switch.
Restart the VTP process on the new switch.
Reload the VTP server.
Verify connected trunk ports.

Explanation

Question 37 of 104

After configuring new data VLANs 1020 through 1030 on the VTP server, a network engineer
notices that none of the VTP clients are receiving the updates. What is the problem?

Select one of the following:

The VTP server must be reloaded.
The VTP version number must be set to version 3.
After each update to the VTP server, it takes up to 4 hours propagate.
VTP must be stopped and restarted on the server.
Another switch in the domain has a higher revision number than the server.

Explanation

Question 38 of 104

A network engineer is extending a LAN segment between two geographically separated data
centers. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing
the extended LAN segment?

Select one of the following:

Modify the spanning-tree priorities to dictate the traffic flow.
Create a Layer 3 transit VLAN to segment the traffic between the sites.
Use VTP pruning on the trunk interfaces.
Configure manual trunk pruning between the two locations.

Explanation

Question 39 of 104

The network manager has requested that several new VLANs (VLAN 10, 20, and 30) are allowed
to traverse the switch trunk interface. After the command switchport trunk allowed vlan 10,20,30 is
issued, all other existing VLANs no longer pass traffic over the trunk. What is the root cause of the
problem?

Select one of the following:

The command effectively removed all other working VLANs and replaced them with the new
VLANs.
VTP pruning removed all unused VLANs.
ISL was unable to encapsulate more than the already permitted VLANs across the trunk.
Allowing additional VLANs across the trunk introduced a loop in the network.

Explanation

Question 40 of 104

When you design a switched network using VTPv2, how many VLANs can be used to carry user
traffic?

Select one of the following:

1000
1001
1024
2048
4095
4096

Explanation

Question 41 of 104

What does the command vlan dot1q tag native accomplish when configured under global
configuration?

Select one of the following:

All frames within the native VLAN are tagged, except when the native VLAN is set to 1.
It allows control traffic to pass using the non-default VLAN.
It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s).
Control traffic is tagged.

Explanation

Question 42 of 104

A network engineer has just deployed a non-Cisco device in the network and wants to get
information about it from a connected device. Cisco Discovery Protocol is not supported, so the
open standard protocol must be configured. Which protocol does the network engineer configure
on both devices to accomplish this?

Select one of the following:

IRDP
LLDP
NDP
LLTD

Explanation

Question 43 of 104

A manager tells the network engineer to permit only certain VLANs across a specific trunk
interface. Which option can be configured to accomplish this?

Select one of the following:

allowed VLAN list
VTP pruning
VACL
L2P tunneling

Explanation

Question 44 of 104

For client server failover purposes, the application server team has indicated that they must not
have the standard 30 second delay before their switchport enters a forwarding state. For their
disaster recovery feature to operate successfully, they require the switchport to enter a forwarding
state immediately. Which spanning-tree feature satisfies this requirement?

Select one of the following:

Rapid Spanning-Tree
Spanning-Tree Timers
Spanning-Tree FastPort
Spanning-Tree PortFast
Spanning-Tree Fast Forward

Explanation

Question 45 of 104

Which command does a network engineer use to verify the spanning-tree status for VLAN 10?

Select one of the following:

switch# show spanning-tree vlan 10
switch# show spanning-tree bridge
switch# show spanning-tree brief
switch# show spanning-tree summary
switch# show spanning-tree vlan 10 brief

Explanation

Question 46 of 104

A new network that consists of several switches has been connected together via trunking
interfaces. If all switches currently have the default VTP domain name "null", which statement
describes what happens when“a do”ain name is configured on one of the switches?

Select one of the following:

The switch with the non-default domain name restores back to "null" upon reboot.
Switches with higher revisio“ num”ers does not accept the new domain name.
VTP summary advertisements are sent out of all ports with the new domain name.
All other switches with the default domain name become VTP clients.

Explanation

Question 47 of 104

A network engineer is setting up a new switched network. The network is expected to grow and
add many new VLANs in the future. Which Spanning Tree Protocol should be used to reduce
switch resources and managerial burdens that are associated with multiple spanning-tree
instances?

Select one of the following:

RSTP
PVST
MST
PVST+
RPVST+

Explanation

Question 48 of 104

Which statement about the use of SDM templates in a Cisco switch is true?

Select one of the following:

SDM templates are used to configure system resources in the switch to optimize support for
specific features, depending on how the switch is used in the network.
SDM templates are used to create Layer 3 interfaces (switch virtual interfaces) to permit hosts in
one VLAN to communicate with hosts in another VLAN.
SDM templates are used to configure ACLs that protect networks and specific hosts from
unnecessary or unwanted traffic.
SDM templates are used to configure a set of ACLs that allows the users to manage the flow of
traffic handled by the route processor.
SDM templates are configured by accessing the switch using the web interface.

Explanation

Question 49 of 104

Which SDM template disables routing and supports the maximum number of unicast MAC
addresses?

Select one of the following:

VLAN
access
default
routing

Explanation

Question 50 of 104

Which SDM template is the most appropriate for a Layer 2 switch that provides connectivity to a
large number of clients?

Select one of the following:

VLAN
default
access
routing

Explanation

Question 51 of 104

In a Cisco switch, what is the default period of time after which a MAC address ages out and is
discarded?

Select one of the following:

100 seconds
180 seconds
300 seconds
600 seconds

Explanation

Question 52 of 104

If a network engineer applies the command mac-address-table notification mac-move on a Cisco
switch port, when is a syslog message generated?

Select one of the following:

A MAC address or host moves between different switch ports
A new MAC address is added to the content-addressable memory.
A new MAC address is removed from the content-addressable memory.
More than 64 MAC addresses are added to the content-addressable memory.

Explanation

Question 53 of 104

Which option is a possible cause for an errdisabled interface?

Select one of the following:

routing loop
cable unplugged
STP loop guard
security violation

Explanation

Question 54 of 104

What is the default value for the errdisable recovery interval in a Cisco switch?

Select one of the following:

30 seconds
100 seconds
300 seconds
600 seconds

Explanation

Question 55 of 104

Which statement about LLDP-MED is true?

Select one of the following:

LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices.
LLDP-MED is an extension to LLDP that operates only between network devices.
LLDP-MED is an extension to LLDP that operates only between endpoint devices.
LLDP-MED is an extension to LLDP that operates between routers that run BGP.

Explanation

Question 56 of 104

Which statement about Cisco devices learning about each other through Cisco Discovery Protocol
is true?

Select one of the following:

Each device sends periodic advertisements to multicast address 01:00:0C:CC:CC:CC.
Each device broadcasts periodic advertisements to all of its neighbors.
Each device sends periodic advertisements to a central device that builds the network topology
Each device sends periodic advertisements to all IP addresses in its ARP table

Explanation

Question 57 of 104

Which option lists the information that is contained in a Cisco Discovery Protocol advertisement?

Select one of the following:

native VLAN IDs, port-duplex, hardware platform
native VLAN IDs, port-duplex, memory errors
native VLAN IDs, memory errors, hardware platform
port-duplex, hardware platform, memory errors

Explanation

Question 58 of 104

Which option describes a limitation of LLDP?

Select one of the following:

LLDP cannot provide information about VTP.
LLDP does not support TLVs.
LLDP can discover only Windows servers.
LLDP can discover up to two devices per port.

Explanation

Question 59 of 104

Which statement about the UDLD protocol is true?

Select one of the following:

UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status
of links and detect unidirectional failures.
UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity,
capabilities, and neighbors on a local area network.
UDLD is a standardized Layer 2 protocol that enables devices to monitor the physical status of
links and detect unidirectional failures.
UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity,
capabilities, and neighbors on a local area network.

Explanation

Question 60 of 104

Which option lists the modes that are available for configuring UDLD on a Cisco switch?

Select one of the following:

normal and aggressive
active and aggressive
normal and active
normal and passive
normal and standby

Explanation

Question 61 of 104

What is the default interval at which Cisco devices send Cisco Discovery Protocol
advertisements?

Select one of the following:

30 seconds
60 seconds
120 seconds
300 seconds

Explanation

Question 62 of 104

Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true?

Select one of the following:

CDP is enabled by default and can be disabled globally with the command no cdp run.
CDP is disabled by default and can be enabled globally with the command cdp enable.
CDP is enabled by default and can be disabled globally with the command no cdp enable.
CDP is disabled by default and can be enabled globally with the command cdp run.

Explanation

Question 63 of 104

Which VTP mode is needed to configure an extended VLAN, when a switch is configured to use
VTP versions 1 or 2?

Select one of the following:

transparent
client
server
Extended VLANs are only supported in version 3 and not in versions 1 or 2.

Explanation

Question 64 of 104

What is the size of the VLAN field inside an 802.1q frame?

Select one of the following:

8-bit
12-bit
16-bit
32-bit

Explanation

Question 65 of 104

What is the maximum number of VLANs that can be assigned to an access switchport without a
voice VLAN?

Select one of the following:

0
1
2
1024

Explanation

Question 66 of 104

Refer to the exhibit.
Which option shows the expected result if a show vlan command is issued?

Select one of the following:

Explanation

Question 67 of 104

Which feature is automatically enabled when a voice VLAN is configured, but not automatically
disabled when a voice VLAN is removed?

Select one of the following:

portfast
port-security
spanning tree
storm control

Explanation

Question 68 of 104

In which portion of the frame is the 802.1q header found?

Select one of the following:

within the Ethernet header
within the Ethernet payload
within the Ethernet FCS
within the Ethernet source MAC address

Explanation

Question 69 of 104

Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a
switch?

Select one of the following:

VLANs 1-1001
VLANs 1-4094
VLANs 2-1001
VLANs 2-4094

Explanation

Question 70 of 104

Which feature must be enabled to eliminate the broadcasting of all unknown traffic to switches that
are not participating in the specific VLAN?

Select one of the following:

VTP pruning
port-security
storm control
bpdguard

Explanation

Question 71 of 104

Refer to the exhibit.
The users in an engineering department that connect to the same access switch cannot access
the network. The network engineer found that the engineering VLAN is missing from the database.
Which action resolves this problem?

Select one of the following:

Disable VTP pruning and disable 802.1q.
Update the VTP revision number.
Change VTP mode to server and enable 802.1q.
Enable VTP pruning and disable 802.1q.

Explanation

Question 72 of 104

Refer to the exhibit.
The network switches for two companies have been connected and manually configured for the
required VLANs, but users in company A are not able to access network resources in company B
when DTP is enabled. Which action resolves this problem?

Select one of the following:

Delete vlan.dat and ensure that the switch with lowest MAC address is the VTP server.
Disable DTP and document the VTP domain mismatch.
Manually force trunking with switchport mode trunk on both switches.
Enable the company B switch with the vtp mode server command.

Explanation

Question 73 of 104

A network engineer must implement Ethernet links that are capable of transporting frames and IP
traffic for different broadcast domains that are mutually isolated. Consider that this is a multivendor
environment. Which Cisco IOS switching feature can be used to achieve the task?

Select one of the following:

PPP encapsulation with a virtual template
Link Aggregation Protocol at the access layer
dot1q VLAN trunking
Inter-Switch Link

Explanation

Question 74 of 104

Which statement about using native VLANs to carry untagged frames is true?

Select one of the following:

Cisco Discovery Protocol version 2 carries native VLAN information, but version 1 does not.
Cisco Discovery Protocol version 1 carries native VLAN information, but version 2 does not.
Cisco Discovery Protocol version 1 and version 2 carry native VLAN information.
Cisco Discovery Protocol version 3 carries native VLAN information, but versions 1 and 2 do not.

Explanation

Question 75 of 104

Refer to the exhibit.
A multilayer switch has been configured to send and receive encapsulated and tagged frames.
VLAN 2013 on the multilayer switch is configured as the native VLAN. Which option is the cause
of the spanning-tree error?

Select one of the following:

VLAN spanning-tree in SW-2 is configured.
spanning-tree bpdu-filter is enabled.
802.1q trunks are on both sides, both with native VLAN mismatch.
VLAN ID 1 should not be used for management traffic because it’s unsafe.

Explanation

Question 76 of 104

A network engineer must improve bandwidth and resource utilization on the switches by stopping
the inefficient flooding of frames on trunk ports where the frames are not needed. Which Cisco
IOS feature can be used to achieve this task?

Select one of the following:

VTP pruning
access list
switchport trunk allowed VLAN
VLAN access-map

Explanation

Question 77 of 104

Which action allows a network engineer to limit a default VLAN from being propagated across all
trunks?

Select one of the following:

Upgrade to VTP version 3 for advanced feature set support.
Enable VTP pruning on the VTP server.
Manually prune default VLAN with switchport trunk allowed vlans remove.
Use trunk pruning vlan 1.

Explanation

Question 78 of 104

What is required for a LAN switch to support 802.1q Q-in-Q encapsulation?

Select one of the following:

Support less than 1500 MTU
Support 1504 MTU or higher
Support 1522 layer 3 IP and IPX packet
Support 1547 MTU only

Explanation

Question 79 of 104

Refer to the exhibit.

How many bytes are added to each frame as a result of the configuration?

Select one of the following:

4-bytes except the native VLAN
8-bytes except the native VLAN
4-bytes including native VLAN
8-bytes including native VLAN

Explanation

Question 80 of 104

A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1, G0/2, G0/3,
and G0/4 between two switches using Ethernet port-channel. Which action allows interface G0/1
to always actively forward traffic in the port-channel?

Select one of the following:

Configure G0/1 as half duplex and G0/2 as full duplex.
Configure LACP port-priority on G0/1 to 1.
Configure LACP port-priority on G0/1 to 65535.
LACP traffic goes through G0/4 because it is the highest interface ID.

Explanation

Question 81 of 104

Which statement about the use of PagP link aggregation on a Cisco switch that is running Cisco
IOS Software is true?

Select one of the following:

PagP modes are off, auto, desirable, and on. Only the combinations auto-desirable, desirabledesirable,
and on-on allow the formation of a channel.
PagP modes are active, desirable, and on. Only the combinations active-desirable, desirable-desirable, and on-on allow the formation of a channel.
PagP modes are active, desirable, and on. Only the combinations active-active, desirabledesirable,
and on-on allow the formation of a channel.
PagP modes are off, active, desirable, and on. Only the combinations auto-auto, desirabledesirable,
and on-on allow the formation of a channel.

Explanation

Question 82 of 104

Refer to the exhibit.
Which EtherChannel negotiation protocol is configured on the interface f0/13 – f0/15?

Select one of the following:

Link Combination Control Protocol
Port Aggregation Protocol
Port Combination Protocol
Link Aggregation Control Protocol

Explanation

Question 83 of 104

Refer to the exhibit.
Users of PC-1 experience slow connection when a webpage is requested from the server. To
increase bandwidth, the network engineer configured an EtherChannel on interfaces Fa1/0 and
Fa0/1 of the server farm switch, as shown here:
Server_Switch#sh etherchannel load-balance
EtherChannel Load-Balancing Operational State (src-mac):
Non-IP: Source MAC address
IPv4: Source MAC address
IPv6: Source IP address
Server_Switch#
HoweIer, traffic is still slow. Which action can the engineer take to resolve this issue?

Select one of the following:

Disable EtherChannel load balancing.
Upgrade the switch IOS to IP services image.
Change the load-balance method to dst-mac.
Contact Cisco TAC to report a bug on the switch.

Explanation

Question 84 of 104

A network engineer changed the port speed and duplex setting of an existing EtherChannel
bundle that uses the PAgP protocol. Which statement describes what happens to all ports in the
bundle?

Select one of the following:

PAgP changes the port speed and duplex for all ports in the bundle.
PAgP drops the ports that do not match the configuration.
PAgP does not change the port speed and duplex for all ports in the bundle until the switch is
rebooted.
PAgP changes the port speed but not the duplex for all ports in the bundle.

Explanation

Question 85 of 104

Which statement about using EtherChannel on Cisco IOS switches is true?

Select one of the following:

A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel.
The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 8
Gbps only for Gigabit EtherChannel.
A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. The
EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 8
Gbps only for Gigabit EtherChannel.
A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel.
The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or
16 Gbps only for Gigabit EtherChannel.
A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. The
EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 10
Gbps only for Gigabit EtherChannel.

Explanation

Question 86 of 104

Refer to the exhibit.
Which statement about switch S1 is true?

Select one of the following:

Physical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 2 port-channel interface
using an open standard protocol.
Logical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 2 physical port-channel
interface using a Cisco proprietary protocol.
Physical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 3 port-channel interface
using a Cisco proprietary protocol.
Logical port Fa0/13, Fa0/14, and Fa0/15 successfully formed a Layer 3 physical port-channel
interface using an open standard protocol.

Explanation

Question 87 of 104

What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives
802.1d BPDU?

Select one of the following:

802.1d does not understand RSTP BPDUs because they are different versions, but when a RSTP
switch receives an 802.1d BPDU, it responds with an 802.1d BPDU and eventually the two
switches run 802.1d to communicate.
802.1d understands RSTP BPDUs because they are the same version, but when a RSTP switch
receives a 802.1d BPDU, it responds with a 802.1d BPDU and eventually the two switches run
802.1d to communicate.
802.1d does not understand RSTP BPDUs because they are different versions, but when a RSTP
switch receives a 802.1d BPDU, it does not respond with a 802.1d BPDU.
802.1d understands RSTP BPDUs because they are the same version, but when a RSTP switch
receives a 802.1d BPDU, it does not respond with a 802.1d BPDU and eventually the two
switches run 802.1d to communicate.

Explanation

Question 88 of 104

When two MST instances (MST 1 and MST 2) are created on a switch, what is the total number of
spanning-tree instances running on the switch?

Select one of the following:

Explanation

Question 89 of 104

Refer to the exhibit.
f1/0 and f1/1 have the same end-to-end path cost to the designated bridge. Which action is
needed to modify the Layer 2 spanning-tree network so that traffic for PC1 VLAN from switch SW3
uses switchport f1/1 as a primary port?

Select one of the following:

Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16.
Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0.
Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16.
Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0.

Explanation

Question 90 of 104

Refer to the exhibit.
Why would the switch be considered as a root bridge?

Select one of the following:

The bridge priority is 1 and all ports are forwarding.
The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”.
The bridge priority is 128.19 and all ports are forwarding.
The switch priority value is zero, it has the lowest priority value for VLAN 1.

Explanation

Question 91 of 104

Refer to the exhibit.

All ports are members of VLAN 10. Considering the default cost of upstream bridges to the root
bridge is equal, which option will be the new root port for VLAN 10?

Select one of the following:

interface f0/13
interface f0/14
interface f0/15
interface f0/21

Explanation

Question 92 of 104

A network engineer is trying to deploy a PC on a network. The engineer observes that when the
PC is connected to the network, it takes 30 to 60 seconds for the PC to see any activity on the
network interface card. Which Layer 2 enhancement can be used to eliminate this delay?

Select one of the following:

Configure port duplex and speed to auto negotiation.
Configure port to duplex full and speed 1000.
Configure spanning-tree portfast.
Configure no switchport.

Explanation

Question 93 of 104

A network engineer configured an Ethernet switch using these commands.
Switchone(config) # Spanning-tree portfast bpdufilter default
Which statement about the spanning-tree portfast feature on the switch is true?

Select one of the following:

If an interface is enabled for portfast receives BDPU, the port goes through the spanning-tree
listening, learning, and forwarding states.
If an interface is enabled for portfast receives BDPU, the port does not go through the spanningtree
listening, learning, and forwarding states.
If an interface is enabled for portfast receives BDPU, the port is shut down immediately.
If an interface is enabled for portfast receives BDPU, the port goes into the spanning-tree
inconsistent state.

Explanation

Question 94 of 104

Which statement describes what happens when a port configured with root guard receives a
superior BPDU?

Select one of the following:

The port goes into errdisabled state and stops forwarding traffic.
The port goes into BPDU-inconsistent state and stops forwarding traffic.
The port goes into loop-inconsistent state and stops forwarding traffic.
The port goes into root-inconsistent state and stops forwarding traffic.

Explanation

Question 95 of 104

Which statement about restrictions for multichassis LACP is true?

Select one of the following:

It is available only on a Cisco Catalyst 6500 Series chassis.
It does not support 1Gb links.
Converting a port channel to mLACP can cause a service disruption.
It is not available in VSS.

Explanation

Question 96 of 104

What is the maximum number of 10 Gigabit Ethernet connections that can be utilized in an
EtherChannel for the virtual switch link?

Select one of the following:

Explanation

Question 97 of 104

Which statement describes what happens if all VSL connections between the virtual switch
members are lost?

Select one of the following:

Both virtual switch members cease to forward traffic.
The VSS transitions to the dual active recovery mode, and both virtual switch members continue
to forward traffic independently.
The virtual switch members reload.
The VSS transitions to the dual active recovery mode, and only the new active virtual switch
continues to forward traffic.

Explanation

Question 98 of 104

Which statement describes what happens when a switch enters dual active recovery mode?

Select one of the following:

The switch shuts down and waits for the VSL link to be restored before sending traffic.
All interfaces are shut down in the formerly active virtual switch member, but the new active virtual
switch forwards traffic on all links.
The switch continues to forward traffic out all links and enables spanning tree on VSL link and all
other links to prevent loops.
The VSS detects which system was last in active state and shuts down the other switch.

Explanation

Question 99 of 104

❌ uses multicast address 0100.0ccc.cccc

Drag and drop to complete the text.

CDP

LLDP

Explanation

Question 100 of 104

❌ supports IEEE 802.2 and 802.3 encapsulation

Drag and drop to complete the text.

CDP

LLDP

Explanation

Question 101 of 104

❌ Default time between protocol frames is 60 seconds

Drag and drop to complete the text.

CDP

LLDP

Explanation

Question 102 of 104

❌ sends topology change notification

Drag and drop to complete the text.

LLDP

CDP

Explanation

Question 103 of 104

❌ uses muticast address 0180.c200.000e

Drag and drop to complete the text.

LLDP

CDP

Explanation

Question 104 of 104

❌ default time between protocol frames is 30 seconds

Drag and drop to complete the text.

LLDP

CDP

Explanation

Check answer

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	Created by Alexander Gomez almost 8 years ago

This exam certifies the switching knowledge and skills of successful candidates. They are certified in planning, configuring, and verifying the implementation of complex enterprise switching solutions that use the Cisco Enterprise Campus Architecture.

Cisco 300-115

Question 1 of 104

QUESTION NO: 1 What is the maximum number of switches that can be stacked using Cisco StackWise?

Select one of the following:

Explanation

Question 2 of 104

A network engineer wants to add a new switch to an existing switch stack. Which configuration must be added to the new switch before it can be added to the switch stack?

Select one of the following:

Explanation

Question 3 of 104

What percentage of bandwidth is reduced when a stack cable is broken?

Select one of the following:

Explanation

Question 4 of 104

Refer to the exhibit. Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel?

Select one of the following:

Explanation

Question 5 of 104

Refer to the exhibit. How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is received or transmitted in VLAN 10 on the GigabitEthernet0/1 port?

Select one of the following:

Explanation

Question 6 of 104

Refer to the exhibit. A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three.)

Select one or more of the following:

Explanation

Question 7 of 104

After an EtherChannel is configured between two Cisco switches, interface port channel 1 is in the down/down state. Switch A is configured with channel-group 1 mode active, while Switch B is configured with channel-group 1 mode desirable. Why is the EtherChannel bundle not working?

Select one of the following:

Explanation

Question 8 of 104

Select one of the following:

Explanation

Question 9 of 104

Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. This command is configured globally: monitor session 2 filter vlan 1 – 8, 39, 52 What is the result of the implemented command?

Select one of the following:

Explanation

Question 10 of 104

Select one of the following:

Explanation

Question 11 of 104

After the implementation of several different types of switches from different vendors, a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. Which vendor-neutral protocol could be used to resolve this issue?

Select one of the following:

Explanation

Question 12 of 104

Several new switches have been added to the existing network as VTP clients. All of the new switches have been configured with the same VTP domain, password, and version. However, VLANs are not passing from the VTP server (existing network) to the VTP clients. What must be done to fix this?

Select one of the following:

Explanation

Question 13 of 104

After implementing VTP, the extended VLANs are not being propagated to other VTP switches. What should be configured for extended VLANs?

Select one of the following:

Explanation

Question 14 of 104

Switch A, B, and C are trunked together and have been properly configured for VTP. Switch C receives VLAN information from the VTP server Switch A, but Switch B does not receive any VLAN information. What is the most probable cause of this behavior?

Select one of the following:

Explanation

Question 15 of 104

Refer to the exhibit. Cisco 300-115 Exam "Pass Any Exam. Any Time." - www.actualtests.com 18 Switch A, B, and C are trunked together and have been properly configured for VTP. Switch B has all VLANs, but Switch C is not receiving traffic from certain VLANs. What would cause this issue?

Select one of the following:

Explanation

Question 16 of 104

After the recent upgrade of the switching infrastructure, the network engineer notices that the port roles that were once “blocking” are now defined as “alternate” and “backup.” What is the reason for this change?

Select one of the following:

Explanation

Question 17 of 104

An administrator recently configured all ports for rapid transition using PortFast. After testing, it has been determined that several ports are not transitioning as they should. What is the reason for this?

Select one of the following:

Explanation

Question 18 of 104

Which technique automatically limits VLAN traffic to only the switches that require it?

Select one of the following:

Explanation

Question 19 of 104

What effect does the mac address-table aging-time 180 command have on the MAC addresstable?

Select one of the following:

Explanation

Question 20 of 104

Select one of the following:

Explanation

Question 21 of 104

QUESTION NO: 1
What is the maximum number of switches that can be stacked using Cisco StackWise?

A network engineer wants to add a new switch to an existing switch stack. Which configuration
must be added to the new switch before it can be added to the switch stack?

Refer to the exhibit.

Which set of configurations will result in all ports on both switches successfully bundling into an
EtherChannel?

Refer to the exhibit.
How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is
received or transmitted in VLAN 10 on the GigabitEthernet0/1 port?

Refer to the exhibit.
A network engineer wants to analyze all incoming and outgoing packets for an interface that is
connected to an access switch. Which three items must be configured to mirror traffic to a packet
sniffer that is connected to the distribution switch? (Choose three.)

After an EtherChannel is configured between two Cisco switches, interface port channel 1 is in the
down/down state. Switch A is configured with channel-group 1 mode active, while Switch B is
configured with channel-group 1 mode desirable. Why is the EtherChannel bundle not working?

Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. This command
is configured globally:
monitor session 2 filter vlan 1 – 8, 39, 52
What is the result of the implemented command?

After the implementation of several different types of switches from different vendors, a network
engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible.
Which vendor-neutral protocol could be used to resolve this issue?

Several new switches have been added to the existing network as VTP clients. All of the new
switches have been configured with the same VTP domain, password, and version. However,
VLANs are not passing from the VTP server (existing network) to the VTP clients. What must be
done to fix this?

After implementing VTP, the extended VLANs are not being propagated to other VTP switches.
What should be configured for extended VLANs?

Switch A, B, and C are trunked together and have been properly configured for VTP. Switch C
receives VLAN information from the VTP server Switch A, but Switch B does not receive any
VLAN information. What is the most probable cause of this behavior?

Refer to the exhibit.
Cisco 300-115 Exam
"Pass Any Exam. Any Time." - www.actualtests.com 18
Switch A, B, and C are trunked together and have been properly configured for VTP. Switch B has
all VLANs, but Switch C is not receiving traffic from certain VLANs. What would cause this issue?

After the recent upgrade of the switching infrastructure, the network engineer notices that the port
roles that were once “blocking” are now defined as “alternate” and “backup.” What is the reason
for this change?

An administrator recently configured all ports for rapid transition using PortFast. After testing, it
has been determined that several ports are not transitioning as they should. What is the reason for
this?

A network engineer deployed a switch that operates the LAN base feature set and decides to use
the SDM VLAN template. The SDM template is causing the CPU of the switch to spike during
peak working hours. What is the root cause of this issue?

An access switch has been configured with an EtherChannel port. After configuring SPAN to
monitor this port, the network administrator notices that not all traffic is being replicated to the
management server. What is a cause for this issue?

Refer to the exhibit.
What is the result of the configuration?

A network engineer tries to configure storm control on an EtherChannel bundle. What is the result
of the configuration?

After reviewing UDLD status on switch ports, an engineer notices that the switch LEDs are green.
Which statement describes what this indicates about the status of the port?

Pilot testing of the new switching infrastructure finds that when the root port is lost, STP
immediately replaces the root port with an alternative root port. Which spanning-tree technology is
used to accomplish backup root port selection?

A network engineer must adjust the STP interface attributes to influence root port selection. Which
two elements are used to accomplish this? (Choose two.)

A network engineer must set the load balance method on an existing port channel. Which action
must be done to apply a new load balancing method?

Refer to the exhibit.
A network engineer investigates a recent network failure and notices that one of the interfaces on
the switch is still down. What is causing the line protocol on this interface to be shown as down?

While doing network discovery using Cisco Discovery Protocol, it is found that rapid error tracking
is not currently enabled. Which option must be enabled to allow for enhanced reporting
mechanisms using Cisco Discovery Protocol?

For security reasons, the IT manager has prohibited users from dynamically establishing trunks
with their associated upstream switch. Which two actions can prevent interface trunking? (Choose
two.)

Which two protocols can be automatically negotiated between switches for trunking? (Choose
two.)

A network is running VTPv2. After verifying all VTP settings, the network engineer notices that the
new switch is not receiving the list of VLANs from the server. Which action resolves this problem?

After configuring new data VLANs 1020 through 1030 on the VTP server, a network engineer
notices that none of the VTP clients are receiving the updates. What is the problem?