思科认证考试（ＣＣＮＡ）考试模拟题６０—７１及答案

65. [RxNx] Which one of the following is true concerning IPX load balancing? 

a) Activated by default 
b) Must be configured 
c) IPX does not load balance 
d) Requires a Novell File Server 
e) None of the above 

Answer 
b) Must be configured 

IPX load balances when configured, the command to use is ipx maximum-paths. So if you have equal cost paths to a destination, the default is the router will choose the first path it receives, unlike Cisco’s implementation of IP RIP that will use up to 4 equal cost paths 

66. [BxNx] What is the purpose of spanning tree? 

a) Prevents bridging loops 
b) Prevents routing loops 
c) Cisco supported feature that can be used per VLAN 
d) Can be initiated on any routed interface 
e) All of the above 

Answer 
a) Prevents bridging loops 
c) Cisco supported feature that can be used per VLAN 

Transparent bridging requires that only one way exists through the bridge circuit to prevent routing loops. Also Cisco switching supports spanning tree an a per VLAN basis. This is done by placing selected ports in a blocking mode. Remember that a bridge either forwards a packet or filters a packet based on it’s mac address. 

Questions 67 - 71 refer to the following diagram and information. 
　
The above figure represents a frame-relay network with PVC’s configured for a hub and spoke design with corresponding DLCI numbers. Assume all connections are with the serial 0 interface. Please refer to the above figure for questions 67-71. 

67. [FINx] Given the following configuration for Router A: 

Router_a(config)#interface s0

Router_a(config-if)#encapsulation 

frame-relay

Router_a(config-if)#frame-relay 

lmi-type ansi

Router_a(config-if)#frame-relay map ip 

172.16.1.2 100

Router_a(config-if)#frame-relay map ip 

172.16.1.3 101

Router_a(config-if)#frame-relay map ip 

172.16.1.4 102