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Review Questions - Chapter 5 VLSMs, Summarization, and Troubleshooting TCP/IP

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Network Fundamentals 1.7 Apply troubleshooting methodologies to resolve problems 1.7.a Perform fault isolation and document 1.7.b Resolve or escalate 1.7.c Verify and monitor resolution 1.8 Configure, verify, and troubleshoot IPv4 addressing and subnetting
Kessi Silva
Quiz by Kessi Silva, updated more than 1 year ago
Kessi Silva
Created by Kessi Silva over 7 years ago
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Resource summary

Question 1

Question
On a VLSM network, which mask should you use on point-to-point WAN links in order to reduce the waste of IP addresses?
Answer
  • /27
  • /28
  • /29
  • /30
  • /31

Question 2

Question
In the network shown in the diagram, how many computers could be in Network B?
Image:
Selection 004 (binary/octet-stream)
Answer
  • 6
  • 12
  • 14
  • 30

Question 3

Question
In the following diagram, in order to have IP addressing that’s as efficient as possible, which network should use a /29 mask?
Image:
Selection 005 (binary/octet-stream)
Answer
  • A
  • B
  • C
  • D

Question 4

Question
To use VLSM, what capability must the routing protocols in use possess?
Answer
  • Support for multicast
  • Multiprotocol support
  • Transmission of subnet mask information
  • Support for unequal load balancing

Question 5

Question
What summary address would cover all the networks shown and advertise a single, efficient route to Router B that won’t advertise more networks than needed?
Image:
Selection 006 (binary/octet-stream)
Answer
  • 172.16.0.0/24
  • 172.16.1.0/24
  • 172.16.0.0/25
  • 172.16.0.0/20
  • 172.16.16.0/28
  • 172.16.0.0/27

Question 6

Question
In the following diagram, what is the most likely reason the station cannot ping outside of its network?
Answer
  • The IP address is incorrect on interface E0 of the router.
  • The default gateway address is incorrect on the station.
  • The IP address on the station is incorrect.
  • The router is malfunctioning.

Question 7

Question
If a host is configured with an incorrect default gateway and all the other computers and router are known to be configured correctly, which of the following statements is TRUE?
Answer
  • Host A cannot communicate with the router.
  • Host A can communicate with other hosts in the same subnet.
  • Host A can communicate with hosts in other subnets.
  • Host A can communicate with no other systems.

Question 8

Question
Which of the following troubleshooting steps, if completed successfully, also confirms that the other steps will succeed as well?
Answer
  • Ping a remote computer.
  • Ping the loopback address.
  • Ping the NIC.
  • Ping the default gateway.

Question 9

Question
When a ping to the local host IP address fails, what can you assume?
Answer
  • The IP address of the local host is incorrect.
  • The IP address of the remote host is incorrect.
  • The NIC is not functional
  • The IP stack has failed to initialize.

Question 10

Question
When a ping to the local host IP address succeeds but a ping to the default gateway IP address fails, what can you rule out? (Choose all that apply.)
Answer
  • The IP address of the local host is incorrect.
  • The IP address of the gateway is incorrect.
  • The NIC is not functional
  • The IP stack has failed to initialize

Question 11

Question
Which of the networks in the diagram could use a /29 mask?
Answer
  • Corporate
  • LA
  • SF
  • NY
  • None

Question 12

Question
What network service is the most likely problem if you can ping a computer by IP address but not by name?
Answer
  • DNS
  • DHCP
  • ARP
  • ICMP

Question 13

Question
When you issue the ping command, what protocol are you using?
Answer
  • DNS
  • DHCP
  • ARP
  • ICMP

Question 14

Question
Which of the following commands displays the networks traversed on a path to a network destination?
Answer
  • ping
  • traceroute
  • pingroute
  • pathroute

Question 15

Question
What command generated the output shown below?
Image:
Selection 010 (binary/octet-stream)
Answer
  • traceroute
  • show ip route
  • ping
  • pathping

Question 16

Question
In the work area, match the command to its function on the right.
Image:
Selection 011 (binary/octet-stream)
Answer
  • __________________________________________________________________________________ | traceroute | Shows you the PC network configuration | __________________________________________________________________________________ | arp -a | Displays IP-to-MAC-address mappings on a Windows PC | __________________________________________________________________________________ | show ip arp | Displays the ARP table on a Cisco router | __________________________________________________________________________________ | ipconfig /all | Displays the list of routers on a path to a network destination | _________________________________________________________________________________
  • __________________________________________________________________________________ | traceroute | Displays the list of routers on a path to a network destination | __________________________________________________________________________________ | arp -a | Shows you the PC network configuration | __________________________________________________________________________________ | show ip arp | Displays the ARP table on a Cisco router | __________________________________________________________________________________ | ipconfig /all | Displays IP-to-MAC-address mappings on a Windows PC | __________________________________________________________________________________
  • __________________________________________________________________________________ | traceroute | Displays the list of routers on a path to a network destination | __________________________________________________________________________________ | arp -a | Displays IP-to-MAC-address mappings on a Windows PC | __________________________________________________________________________________ | show ip arp | Displays the ARP table on a Cisco router | __________________________________________________________________________________ | ipconfig /all | Shows you the PC network configuration | __________________________________________________________________________________
  • __________________________________________________________________________________ | traceroute | Displays the list of routers on a path to a network destination | __________________________________________________________________________________ | arp -a | Displays IP-to-MAC-address mappings on a Windows PC | __________________________________________________________________________________ | show ip arp | Shows you the PC network configuration | __________________________________________________________________________________ | ipconfig /all | Displays the ARP table on a Cisco router | __________________________________________________________________________________

Question 17

Question
17. Which of the following network addresses correctly summarizes the three networks shown below efficiently? 10.0.0.0/16 10.1.0.0/16 10.2.0.0/16
Answer
  • 10.0.0.0/15
  • 10.1.0.0/8
  • 10.0.0.0/14
  • 10.0.0.8/16

Question 18

Question
What command displays the ARP table on a Cisco router?
Answer
  • show ip arp
  • traceroute
  • arp -a
  • tracert

Question 19

Question
What switch must be added to the ipconfig command on a PC to verify DNS configuration?
Answer
  • /dns
  • -dns
  • /all
  • showall

Question 20

Question
Which of the following is the best summarization of the following networks: 192.168.128.0through 192.168.159.0?
Answer
  • 192.168.0.0/24
  • 192.168.128.0/16
  • 192.168.128.0/19
  • 192.168.128.0/20
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