Ccna certification Practice Tests

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Appendix 

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  Answers to Practice Test Questions

 218.  D.  When configuring OSPF for the designated router (DR), if you configure another 

router with a higher priority, the original DR will remain the current DR. OSPF does 

not allow for preemption, and therefore you must force the election by clearing the OSPF 

process on the DR. This will force the DR to relinquish its status. Using the 

shutdown 

command on the interface with the highest IP address will not restart the OSPF process. 

The command 

ospf election force is invalid; there is no such command. Executing the 

command 

clear ip ospf process on any router other than the DR will only restart the 

OSPF process on the router it is executed on.

 219.  A.  In order to form an adjacency, the two neighbors must have the same hello timer of 

30 seconds. The routers can be configured with multiple area IDs, and this will not affect 

their ability to form an adjacency. The default hello interval on a LAN is 10 seconds; for 

non-broadcast networks such as Frame Relay, the hello timer is 30 seconds. In order to 

form an adjacency, the hello and dead intervals must match.

 220.  B.  The administrative distance for OSPF is 110. Internal Enhanced Interior Gateway 

Routing Protocol (EIGRP) has an administrative distance (AD) of 90. RIP has an 

administrative distance of 120. Internal Boarder Gateway Protocol (BGP) has an 

administrative distance of 200.

 221.  B.  Virtual Router Redundancy Protocol (VRRP) is an IEEE open standard that is 

supported freely on many router products. Proxy ARP is not considered a FHRP but is 

used in conjunction with FHRPs as a helper protocol. Gateway Load Balancing Protocol 

(GLBP) is a Cisco proprietary FHRP for load balancing multiple gateways. Hot Standby 

Router Protocol (HSRP) is also a Cisco proprietary FHRP for highly available gateways.

 222.  D.  The well-known HSRP ID is 07.ac. Anytime you see 07.ac in the second part of the 

MAC address along with the Cisco OUI, you can identify that HSRP is being employed. 

The first 24 bits of the MAC address, in this example 0000.0c, compose the default 

organizationally unique identifier (OUI) for Cisco. The oc07 in the MAC address is part 

of the OUI and part of the well-known HSRP ID. The 0a in the MAC address is the HSRP 

group number.

 223.  C.  Gateway Load Balancing Protocol (GLBP) is a Cisco proprietary protocol that 

supports redundancy and per-subnet load balancing. Proxy ARP is not considered a FHRP 

but is used in conjunction with FHRPs as a helper protocol. Virtual Router Redundancy 

Protocol (VRRP) is an IEEE open standard that is supported freely on many router 

products. Hot Standby Router Protocol (HSRP) is also a Cisco proprietary FHRP for 

highly available gateways, but it does not support load balancing.

 224.  C.  The HSRP group number in the MAC address 0000.0c07.ac01 is 01. After the 

Cisco OUI and well-known HSRP ID, the last two digits are the HSRP group identifier. 

The first 24 bits of the MAC address, in this example 0000.0c, compose the default 

organizationally unique identifier (OUI) for Cisco. The 0c07 in the MAC address is part 

of the OUI and part of the well-known HSRP ID. The well-known HSRP ID is 07.ac. 

Anytime you see 07.ac in the second part of the MAC address along with the Cisco OUI, 

you know that HSRP is being employed.

 225.  A.  The default priority of HSRP is 100. All other answers are incorrect.

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Chapter 3: IP Connectivity (Domain 3)