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Q71
You are a network technician at CertKing , Inc. You add a new workstation to the CertKing network to
accommodate a new employee. The relevant section of the CertKing network is shown in the following
exhibit:
The employee is unable to connect to the server CertKing A at IP address 192.168.10.98/27.
Can you identify the incorrectly configured network parameter in the workstation configuration?A. IP address of the Ethernet 0 router interfaceB. Server is using an invalid IP addressC. Workstation default gatewayD. Workstation subnet maskE. Workstation IP addressAns: C
Explanation:
The default gateway of the host (192.168.10.64) is wrong. 192.168.10.64 is the network address of the host's
network in this question. The default gateway should be the address of the local interface of the router. In this
case: 192.168.10.65.
Incorrect Anss:
A: The IP address of the Eternet0 interface is valid.
B: The IP address of the server is valid.
D: The network uses a 27 bit subnet mask which equates to 255.255.255.224.
E: The IP host address 192.168.10.66 is a valid host address on the subnet.
Q72
You are a network technician at CertKing . Your trainee asks you what 11111000 binary is in decimal.
What would your reply be?A. 220B. 224C. 240D. 248E. 256Ans: D
Explanation:
128 + 64+32+16+8 = 248. Since this is the last octet of the interface, the subnet mask would be expressed as a
/29.
Reference:
CCNA Self-Study CCNA ICND exam certification Guide (Cisco Press, ISBN 1-58720-083-X) Page 559
Incorrect Anss:A. The number 210 would be 11010010 in binary.B. The number 224 would be 11100000 in binary.C. The number 240 would be 11110000 in binaryE. The number 252 would be 11111100 in binary. This is known as a /30 and is used often in point-point links,
since there are only 2 available addresses for use in this subnet.
Q73
You are a network technician at CertKing , Inc. You received a report that users on the 172.17.22.0
network are unable to reach the server located on the 172.31.5.0 network. You connected to router
CertKing 1 via the console port, issued the show ip route command, and could ping the server.
The network topology and the output from the show ip route is shown in the following exhibit:
172.17.22.0 172.31.5.0
Changes to the CertKing network were made, and now users on the CertKing 3 LAN are not able to
connect to the CertKing 4 LAN. Based on the information above, what could be the reason for this?A. The FastEthernet interface is disabled.B. The neighbor relationship table is not updated.C. A static route is configured incorrectly.D. The routing table on CertKing 1 is not updated.E. IP routing is not enabled.Ans: C
Explanation:
On the bottom line of the command output for 'show ip route' you can see that there is an asterisk by the letter
S. The S stands for static route, and the static route is incorrectly configured.
Incorrect Anss:A. If this were true, then the users on the LAN would be unable to connect to anything outside of their own
network.B. It appears that only a single static route is being used on the CertKing 1 router. Neighbors do not need to be
established for static routes.D. The routing table consists of a single static route, which is configured incorrectly. The routing tables do not
become updated dynamically when static routes are used.E. This is not true, as a static route has been configured.
Q74
You are a network technician at CertKing , Inc. The router topology for the CertKing network is shown in
the following exhibit:
CertKing 2 and CertKing 3 are configured for RIPv1 and have complete connectivity. CertKing 1 was
recently added to the network. You want CertKing 1 to have full connectivity as well.
What would then be the most appropriate CertKing 1 configuration?A. CertKing 1(config)# router rip
CertKing 1(config-router)# network 10.0.0.0
CertKing 1(config-router)# network 172.16.0.0
CertKing 1(config-router)# network 192.168.1.0B. CertKing 1(config)# router rip
CertKing 1(config-router)# network 10.0.0.0
CertKing 1(config-router)# network 192.168.1.0C. CertKing 1(config)# router rip
CertKing 1(config-router)# network 10.0.0.0
CertKing 1(config-router)# network 172.16.0.0D. CertKing 1(config)# router rip
CertKing 1(config-router)# network 10.0.0.0Ans: C
Explanation: When configuring RIP you configure only the directly connected networks that are to be
advertised via the RIP routing process are to be configured.
Incorrect Anss:A. This choice implies that when configuring rip on a router every possible network in the entire system should
be configured. This is not the case.B. CertKing 1 requires the 172.16.0.0 network to be configured, not the 192.168.1.0 network.D. If the 172.16.0.0 network is omitted, then the other routers in the network will not be able to reach the LAN
users of CertKing 1 via RIP.
Reference:
CCNA Self-Study CCNA ICND exam certification Guide (Cisco Press, ISBN 1-58720-083-X) page 167
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