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Router & Routing Basics CH 6, 7, 8 Exam

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Router & Routing Basics CH 6, 7, 8 Exam
Anthony Schulmeister
Quiz by Anthony Schulmeister, updated more than 1 year ago
Anthony Schulmeister
Created by Anthony Schulmeister about 9 years ago
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Question 1

Question
What are two advantages of static routing over dynamic routing? (Choose two.)
Answer
  • Static routing is more secure because it does not advertise over the network.
  • Static routing is relatively easy to configure for large networks.
  • Static routing requires very little knowledge of the network for correct implementation.
  • Static routing uses fewer router resources than dynamic routing.
  • Static routing scales well with expanding networks.

Question 2

Question
Refer to the exhibit. Which is the best way for PC A and PC B to successfully communicate with sites on the Internet?
Image:
90c6df52-6863-4d6a-9acf-18e1af91d633 (image/png)
Answer
  • Configure a default route from R1 to ISP and a static route from ISP to R1.
  • Configure a static route from R1 to ISP and a dynamic route from ISP to R1.
  • Configure a routing protocol between R1 and ISP and advertise all the routes.
  • Configure a dynamic route from R1 to ISP and a static route from ISP to R1.

Question 3

Question
Refer to the exhibit. The small company shown uses static routing. Users on the R2 LAN have reported a problem with connectivity. What is the issue?
Image:
206b5072-ebb9-4536-ab4a-0bc48aa7f67c (image/png)
Answer
  • R1 and R2 must use a dynamic routing protocol.
  • R1 needs a default route to R2.
  • R2 needs a static route to the Internet.
  • R2 needs a static route to the R1 LANs
  • R1 needs a static route to the R2 LAN.

Question 4

Question
Refer to the exhibit. The network engineer for the company that is shown wants to use the primary ISP connection for all external connectivity. The backup ISP connection is used only if the primary ISP connection fails. Which set of commands would accomplish this goal?
Image:
3627fdae-bdee-4c35-b251-7bfc22aa62b8 (image/png)
Answer
  • ip route 198.133.219.24 255.255.255.252 ip route 64.100.210.80 255.255.255.252
  • ip route 198.133.219.24 255.255.255.252 ip route 64.100.210.80 255.255.255.252 10
  • ip route 0.0.0.0 0.0.0.0 s0/0/0 ip route 0.0.0.0 0.0.0.0 s0/1/0
  • ip route 0.0.0.0 0.0.0.0 s0/0/0 ip route 0.0.0.0 0.0.0.0 s0/1/0 10 ******

Question 5

Question
What type of route allows a router to forward packets even though its routing table contains no specific route to the destination network?
Answer
  • generic route
  • destination route
  • dynamic route
  • default route

Question 6

Question
Refer to the graphic. Which command would be used on router A to configure a static route to direct traffic from LAN A that is destined for LAN C?
Answer
  • A(config)# ip route 192.168.3.2 255.255.255.0 192.168.4.0
  • A(config)# ip route 192.168.5.0 255.255.255.0 192.168.3.2
  • A(config)# ip route 192.168.3.0 255.255.255.0 192.168.3.1
  • A(config)# ip route 192.168.4.0 255.255.255.0 192.168.3.2
  • A(config)# ip route 192.168.4.0 255.255.255.0 192.168.5.2

Question 7

Question
The network administrator configures the router with the ip route 172.16.1.0 255.255.255.0 172.16.2.2 command. How will this route appear in the routing table?
Answer
  • S 172.16.1.0 is directly connected, Serial0/0
  • S 172.16.1.0 [1/0] via 172.16.2.2
  • C 172.16.1.0 [1/0] via 172.16.2.2
  • C 172.16.1.0 is directly connected, Serial0/0

Question 8

Question
Refer to the exhibit. The network administrator needs to configure a default route on the Border router. Which command would the administrator use to configure a default route that will require the least amount of router processing when forwarding packets?
Image:
d50b78a6-8997-412c-aca9-b51277ed9bbe (image/png)
Answer
  • Border(config)# ip route 0.0.0.0 0.0.0.0 s0/0/1*
  • Border(config)# ip route 0.0.0.0 0.0.0.0 198.133.219.5
  • Border(config)# ip route 0.0.0.0 0.0.0.0 s0/0/0
  • Border(config)# ip route 0.0.0.0 0.0.0.0 198.133.219.6

Question 9

Question
Why would a floating static route be configured with an administrative distance that is higher than the administrative distance of a dynamic routing protocol that is running on the same router?
Answer
  • to be the priority route in the routing table
  • to be used as a backup route
  • to act as a gateway of last resort
  • to load-balance the traffic

Question 10

Question
Refer to the exhibit. What command would be used to configure a static route on R1 so that traffic from both LANs can reach the 2001:db8:1:4::/64 remote network?
Image:
0e435f43-6f72-4618-8a70-e1c8073667a0 (image/png)
Answer
  • ipv6 route 2001:db8:1::/65 2001:db8:1:3::1
  • ipv6 route 2001:db8:1:4::/64 2001:db8:1:3::2
  • ipv6 route 2001:db8:1:4::/64 2001:db8:1:3::1
  • ipv6 route ::/0 serial0/0/0

Question 11

Question
Refer to the exhibit. Which default static route command would allow R1 to potentially reach all unknown networks on the Internet?
Image:
419bf90c-bfe3-42c3-8471-cf08153b9ea4 (image/png)
Answer
  • R1(config)# ipv6 route 2001:db8:32::/64 G0/1 fe80::2
  • R1(config)# ipv6 route ::/0 G0/0 fe80::2
  • R1(config)# ipv6 route ::/0 G0/1 fe80::2
  • R1(config)# ipv6 route 2001:db8:32::/64 G0/0

Question 12

Question
Which two statements describe classful IP addresses? (Choose two.)
Answer
  • All subnets in a network are the same size.
  • Only Class A addresses can be represented by high-order bits 100.
  • Three of the five classes of addresses are reserved for multicasts and experimental use.
  • The number of bits used to identify the hosts is fixed by the class of the network.
  • Up to 24 bits can make up the host portion of a Class C address.
  • It is possible to determine which class an address belongs to by reading the first bit.

Question 13

Question
A company has several networks with the following IP address requirements: IP phones – 50 PCs – 70 IP cameras – 10 wireless access points – 10 network printers – 10 network scanners – 2 Which block of addresses would be the minimum to accommodate all of these devices if each type of device was on its own network?
Answer
  • 172.16.0.0/23
  • 172.16.0.0/24
  • 172.16.0.0/22
  • 172.16.0.0/25

Question 14

Question
What does VLSM allow a network administrator to do?
Answer
  • utilize one public IP address to translate multiple private addresses
  • utilize multiple different subnet masks in the same IP address space
  • utilize one dynamic routing protocol throughout the entire network
  • utilize multiple routing protocols within an autonomous system
  • utilize one subnet mask throughout a hierarchical network

Question 15

Question
What would be the best summary route for the following networks? 10.50.168.0/23 10.50.170.0/23 10.50.172.0/23 10.50.174.0/24
Answer
  • 10.50.160.0/22
  • 10.50.164.0/23
  • 10.50.168.0/16
  • 10.50.168.0/21
  • 10.50.168.0/22
  • 10.50.168.0/23

Question 16

Question
What is a valid summary route for IPv6 networks 2001:0DB8:ACAD:4::/64, 2001:0DB8:ACAD:5::/64, 2001:0DB8:ACAD:6::/64, and 2001:0DB8:ACAD:7::/64?
Answer
  • 2001:0DB8:ACAD:0000::/63
  • 2001:0DB8:ACAD:0000::/64
  • 2001:0DB8:ACAD:0004::/62
  • 2001:0DB8:ACAD:0004::/63

Question 17

Question
Which type of static route that is configured on a router uses only the exit interface?
Answer
  • directly connected static route
  • fully specified static route
  • default static route
  • recursive static route

Question 18

Question
Which three IOS troubleshooting commands can help to isolate problems with a static route? (Choose three.)
Answer
  • show ip route
  • show ip interface brief
  • ping
  • tracert
  • show arp
  • show version

Question 19

Question
Refer to the exhibit. What two commands will change the next-hop address for the 10.0.0.0/8 network from 172.16.40.2 to 192.168.1.2? (Choose two.)
Image:
9072bb8a-f2f6-46d0-bd7f-6e06a053236a (image/png)
Answer
  • A(config)# ip route 10.0.0.0 255.0.0.0 192.168.1.2
  • A(config)# ip route 10.0.0.0 255.0.0.0 s0/0/0
  • A(config)# no ip address 10.0.0.1 255.0.0.0 172.16.40.2
  • A(config)# no network 10.0.0.0 255.0.0.0 172.16.40.2
  • A(config)# no ip route 10.0.0.0 255.0.0.0 172.16.40.2

Question 20

Question
What happens to a static route entry in a routing table when the outgoing interface is not available?
Answer
  • The router polls neighbors for a replacement route.
  • The router redirects the static route to compensate for the loss of the next hop device.
  • The route is removed from the table.
  • The route remains in the table because it was defined as static.

Question 21

Question
What is the purpose of the passive-interface command?
Answer
  • allows interfaces to share IP addresses
  • allows an interface to remain up without receiving keepalives
  • allows a router to send routing updates on an interface but not receive updates via that interface
  • allows a routing protocol to forward updates out an interface that is missing its IP address
  • allows a router to receive routing updates on an interface but not send updates via that interface

Question 22

Question
What two tasks do dynamic routing protocols perform? (Choose two.)
Answer
  • assign IP addressing
  • network discovery
  • propagate host default gateways
  • update and maintain routing tables
  • discover hosts

Question 23

Question
The command “[blank_start]version 2[blank_end]” is used in RIP router configuration mode to enable the sending of subnet masks with the routing updates.
Answer
  • version 2

Question 24

Question
Refer to the exhibit. OSPF is used in the network. Which path will be chosen by OSPF to send data packets from Net A to Net B?
Answer
  • R1, R3, R5, R7
  • R1, R4, R6, R7
  • R1, R2, R5, R7
  • R1, R3, R6, R7
  • R1, R3, R5, R6, R7

Question 25

Question
Which two statements are true regarding classless routing protocols? (Choose two.)
Answer
  • allows for use of both 192.168.1.0/30 and 192.168.1.16/28 subnets in the same topology
  • sends subnet mask information in routing updates
  • is supported by RIP version 1
  • reduces the amount of address space available in an organization
  • sends complete routing table update to all neighbors

Question 26

Question
What two actions result from entering the network 192.168.1.0 command in RIP configuration mode on a router? (Choose two.)
Answer
  • The neighboring routers are sent a request for routing updates.
  • The routing table is created in the RAM of the router.
  • Routing updates are sent through all the interfaces belonging to 192.168.1.0.
  • The RIP process is stopped and all existing RIP configurations are erased.
  • The network address 192.168.1.0 is advertised to the neighbor routers

Question 27

Question
Refer to the exhibit. Based on the partial output from the show ip route command, what two facts can be determined about the RIP routing protocol? (Choose two.)
Image:
21223fbc-361d-4cb0-ad85-1c56b15e3e10 (image/png)
Answer
  • The command no auto-summary has been used on the RIP neighbor router.*
  • RIP version 1 is running on this router and its RIP neighbor.
  • RIP will advertise two networks to its neighbor.
  • The metric to the network 172.16.0.0 is 120.
  • RIP version 2 is running on this router and its RIP neighbor.

Question 28

Question
In the context of routing protocols, what is a definition for time to convergence?
Answer
  • the capability to transport data, video, and voice over the same media
  • the amount of time for the routing tables to achieve a consistent state after a topology change
  • a measure of protocol configuration complexity
  • the amount of time a network administrator needs to configure a routing protocol in a small- to medium-sized network

Question 29

Question
Fill in the blank. Do not abbreviate. When configuring RIPng, the ” [blank_start]default-information originate[blank_end] ” command instructs the router to propagate a static default route.
Answer
  • default-information originate

Question 30

Question
A destination route in the routing table is indicated with a code D. Which kind of route entry is this?
Answer
  • a route dynamically learned through the EIGRP routing protocol
  • a route used as the default gateway
  • a network directly connected to a router interface
  • a static route

Question 31

Question
Refer to the exhibit. Which interface will be the exit interface to forward a data packet with the destination IP address 172.16.0.66?
Image:
3bdb598e-71ef-4992-bb22-49a7ca4b51e8 (image/png)
Answer
  • Serial0/0/0
  • Serial0/0/1
  • GigabitEthernet0/0
  • GigabitEthernet0/1

Question 32

Question
Which route is the best match for a packet entering a router with a destination address of 10.16.0.2?
Answer
  • S 10.16.0.0/16 is directly connected, Ethernet 0/1
  • S 10.16.0.0/24 [1/0] via 192.168.0.9
  • S 10.0.0.0/8 [1/0] via 192.168.0.2
  • S 10.0.0.0/16 is directly connected, Ethernet 0/0

Question 33

Question
Which two requirements are necessary before a router configured with a link-state routing protocol can build and send its link-state packets? (Choose two.)
Answer
  • The router has determined the costs associated with its active links.
  • The router has constructed an SPF tree.
  • The router has established its adjacencies.
  • The routing table has been refreshed.
  • The router has built its link-state database.

Question 34

Question
Which two requirements are used to determine if a route can be considered as an ultimate route in a router’s routing table? (Choose two.)
Answer
  • contain a next-hop IP address
  • contain subnets
  • be a classful network entry
  • be a default route
  • contain an exit interface

Question 35

Question
What is different between IPv6 routing table entries compared to IPv4 routing table entries?
Answer
  • By design IPv6 is classless so all routes are effectively level 1 ultimate routes.
  • IPv6 does not use static routes to populate the routing table as used in IPv4.
  • IPv6 routing tables include local route entries which IPv4 routing tables do not.
  • The selection of IPv6 routes is based on the shortest matching prefix, unlike IPv4 route selection which is based on the longest matching prefix.

Question 36

Question
Which dynamic routing protocol was developed as an exterior gateway protocol to interconnect different Internet providers?
Answer
  • RIP
  • OSPF
  • EIGRP
  • BGP

Question 37

Question
Which route will a router use to forward an IPv4 packet after examining its routing table for the best match with the destination address?
Answer
  • a level 1 child route
  • a level 1 parent route
  • a level 2 supernet route
  • a level 1 ultimate route

Question 38

Question
Which two statements describe the OSPF routing protocol? (Choose two.)
Answer
  • used primarily as an EGP
  • has an administrative distance of 100
  • calculates its metric using bandwidth
  • automatically summarizes networks at the classful boundaries
  • uses Dijkstra’s algorithm to build the SPF tree

Question 39

Question
Which two events will trigger the sending of a link-state packet by a link-state routing protocol? (Choose two.)
Answer
  • the requirement to periodically flood link-state packets to all neighbors
  • a change in the topology
  • the initial startup of the routing protocol process
  • the router update timer expiring
  • a link to a neighbor router has become congested

Question 40

Question
Which OSPF component is identical in all routers in an OSPF area after convergence?
Answer
  • routing table
  • link-state database
  • SPF tree
  • adjacency database

Question 41

Question
Which three statements describe features of the OSPF topology table? (Choose three.)
Answer
  • When converged, all routers in an area have identical topology tables.
  • Its contents are the result of running the SPF algorithm.
  • After convergence, the table only contains the lowest cost route entries for all known networks.
  • It is a link-state database that represents the network topology.
  • The topology table contains feasible successor routes.
  • The table can be viewed via the show ip ospf database command.

Question 42

Question
A router is participating in an OPSFv2 domain. What will always happen if the dead interval expires before the router receives a hello packet from an adjacent DROTHER OPSF router?
Answer
  • SPF will run and determine which neighbor router is “down”.
  • OSPF will run a new DR/BDR election
  • OSPF will remove that neighbor from the router link-state database.
  • A new dead interval timer of 4 times the hello interval will start.

Question 43

Question
Which command will provide information specific to OSPFv3 routes in the routing table?
Answer
  • show ip route ospf
  • show ip route
  • show ipv6 route ospf
  • show ipv6 route

Question 44

Question
Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?
Answer
  • 0.0.0.32
  • 0.0.0.31
  • 255.255.255.223
  • 255.255.255.224

Question 45

Question
A network administrator enters the command ipv6 router ospf 64 in global configuration mode. What is the result of this command?
Answer
  • The OSPFv3 process will be assigned an ID of 64.
  • The router will be assigned a router ID of 64.
  • The router will be assigned an autonomous system number of 64.
  • The reference bandwidth will be set to 64 Mb/s.

Question 46

Question
The election of a DR and a BDR takes place on ” [blank_start]multiaccess[blank_end] ” networks, such as Ethernet networks.
Answer
  • multiaccess

Question 47

Question
OSPF uses ” [blank_start]cost[blank_end] ” as a metric.
Answer
  • cost

Question 48

Question
Which command should be used to check the OSPF process ID, the router ID, networks the router is advertising, the neighbors the router is receiving updates from, and the default administrative distance?
Answer
  • show ip protocols
  • show ip ospf interface
  • show ip ospf
  • show ip ospf neighbor

Question 49

Question
Which OSPFv3 function works differently from OSPFv2?
Answer
  • authentication
  • metric calculation
  • hello mechanism
  • election process
  • OSPF packet types

Question 50

Question
Fill in the blank. Do not use abbreviations. To quickly verify OSPFv3 configuration information including the OSPF process ID, the router ID, and the interfaces enabled for OSPFv3, you need to issue the command ” [blank_start]show ipv6 protocols[blank_end] ”
Answer
  • show ipv6 protocols

Question 51

Question
Which three statements describe the similarities between OSPFv2 and OSPFv3? (Choose three.)
Answer
  • They both have unicast routing enabled by default.
  • They both use the exit interface address as the source address when sending OSPF messages.
  • They both use the same DR/BDR election process.
  • They both support IPsec for authentication.
  • They both share the concept of multiple areas.
  • They both are link-state protocols.

Question 52

Question
What is a function of OSPF hello packets?
Answer
  • to send specifically requested link-state records
  • to discover neighbors and build adjacencies between them
  • to request specific link-state records from neighbor routers
  • to ensure database synchronization between routers

Question 53

Question
What are the two purposes of an OSPF router ID? (Choose two.)
Answer
  • to uniquely identify the router within the OSPF domain
  • to enable the SPF algorithm to determine the lowest cost path to remote networks
  • to facilitate the transition of the OSPF neighbor state to Full
  • to facilitate router participation in the election of the designated router
  • to facilitate the establishment of network convergence

Question 54

Question
Which command will verify that a router that is running OSPFv3 has formed an adjacency with other routers in its OSPF area?
Answer
  • show ipv6 ospf neighbor
  • show ipv6 route ospf
  • show ipv6 interface brief
  • show running-configuration

Question 55

Question
Single area OSPFv3 has been enabled on a router via the ipv6 router ospf 20 command. Which command will enable this OSPFv3 process on an interface of that router?
Answer
  • ipv6 ospf 20 area 0
  • ipv6 ospf 20 area 20
  • ipv6 ospf 0 area 20
  • ipv6 ospf 0 area 0

Question 56

Question
When a network engineer is configuring OSPFv3 on a router, which command would the engineer issue immediately before configuring the router ID?
Answer
  • ipv6 router ospf 10
  • ipv6 ospf 10 area 0
  • interface serial 0/0/1
  • clear ipv6 ospf process

Question 57

Question
Which criterion is preferred by the router to choose a router ID?
Answer
  • the IP address of the highest configured loopback interface on the router
  • the router-id rid command
  • the IP address of the highest active OSPF-enabled interface
  • the IP address of the highest active interface on the router

Question 58

Question
Which OPSF packet contains the different types of link-state advertisements?
Answer
  • LSR
  • LSU
  • DBD
  • LSAck
  • hello

Question 59

Question
What does a Cisco router use automatically to create link-local addresses on serial interfaces when OSPFv3 is implemented?
Answer
  • an Ethernet interface MAC address available on the router, the FE80::/10 prefix, and the EUI-64 process
  • the MAC address of the serial interface, the FE80::/10 prefix, and the EUI-64 process
  • the FE80::/10 prefix and the EUI-48 process
  • the highest MAC address available on the router, the FE80::/10 prefix, and the EUI-48 process
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