Ccna certification Practice Tests

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Appendix 

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  Answers to Practice Test Questions

 64.  A.  The command 

show ip protocols will list the router ID of the current router as well 

as the networks that are being advertised via OSPF on the current router. The command 

show ip ospf is incorrect. The command show ip ospf database is incorrect. The 

command 

show ip ospf neighbors is incorrect.

 65.  C.  When Hot Standby Router Protocol (HSRP) is used, the default gateway the client is 

issued is an IP address for the virtual router. The virtual router is not a physical router, 

but it is mapped to a physical router via HSRP. The active router processes requests for the 

virtual router IP address by responding to the virtual MAC address associated with the 

virtual router IP address. The standby router only becomes active if the active router is no 

longer responding with hello packets for 10 seconds. Support routers are any routers used 

outside of HSRP to support routing of the network.

 66.  C.  The flexibility of Internet connections is usually a driving factor for PAT (NAT 

Overloading). Memory is significantly higher with PAT, since the source and destination 

port numbers must be recorded in the NAT table. There is no effect on packet loss, and 

jitter is marginally affected. Memory usage is actually higher than with other types of 

NAT because it must account for ports in the NAT table.

 67.  D.  The command to configure the private side of the network interface for NAT is 

ip 

nat inside. This command is configured on the interface in which you want to define 

it as the “inside” of your network. The configuration of the command 

ip nat outside 

is incorrect. The command 

ip nat inside gi0/0 is incorrect. The command ip nat 

private is incorrect.

 68.  C.  Time synchronization is important for logging accuracy. Serial communication frame 

alignment is timed via DCE clocking and packet queues are timed by how fast they can 

respond. The serialized communication for frame alignment comes from the DCE side of 

the link, which provides clocking signals. Time synchronization has no effect on quality of 

service queuing or the delivery of packets via timed queues.

 69.  D.  Fully qualified domain names (FQDNs) are significant from right to left, starting with 

a period to signify the root. The period is normally not visible on the FQDN, but it is 

processed as the root lookup. A DNS server will not always process the entire FQDN if 

there is a cached entry for the resource record requested. FQDNs are not always registered 

with a registrar because organizations used them for authentication and internal purposes. 

FQDNs are resolved from right to left starting with the root, not left to right.

 70.  A.  Simple Network Management Protocol (SNMP) uses UDP port 161 for communication 

from an SNMP network management station to a network device for information 

requests. SNMP uses UDP and TCP port 162 for traps and not polling. Syslog uses UDP 

and TCP port 514 for sending log entries.

 71.  A.  The command 

show logging will display the configured syslog server and the current 

severity level for logs to be sent to the syslog server. The command 

show syslog is 

incorrect. The command 

show log-server is incorrect. The command show ip logging 

is incorrect.

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Chapter 7: Practice Exam 1