单选题
In network that support VLSM, which network mask should be used for point-to-point WAN links in order to reduce waste of IP addresses?（）
/24
/30
/27
/26
/32
单选题
What is the purpose of assigning an IP address to a switch?（）
Provides local hosts with a default gateway address
Allows remote management of the switch.
Allows the switch to respond to ARP requests between two hosts
Ensures that hosts on the same LAN can communicate with each other.
单选题
You have a single ISDN BRI B channel. What is its maximum bandwidth capacity of this one channel?（）
16kb/s
64kb/s
128kb/s
144kb/s
192kb/s
256kb/s
单选题
The Testking router is running both RIP and IGRP, and the same route is learned by this router from both of these methods. However, when you issue the command"show ip route" you see only the IGRP route, and not the RIP route. Why is this?（）
IGRP has a faster update timer.
IGRP has a lower administrative distance.
RIP has a higher metric value for that route.
The IGRP route has fewer hops.
The RIP path has a routing loop.
单选题
A RIP router has an entry in the routing table for a specific network destination. It then gets updated with another entry for that same destination, but with a higher path cost (hop count) than the one already in the routing table. What will the router do in this situation?（）
It will ignore the update and take no further action.
It will add the update information to its routing table.
It will replace the existing routing table entry with the update information.
It will delete the existing routing table and will send out hello packets to rebuild the routing table.
单选题
Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational? （）
frame-relay arp
frame-relay map
frame-relay interface-dlci
frame-relay lmi-type
单选题
You are troubleshooting a frame relay connection and wish to view the LMI traffic stats. Which command should you issue?（）
Show interface lmi
Show frame-relay lmi
Show interface frame-relay
Debug frame-relay interface.
单选题
What is the purpose of the command shown below?vtp password Fl0r1da（）
It is used to validate the sources of VTP advertisements sent between switches.
It is used to access the VTP server to make changes to the VTP configuration.
It allows two VTP servers to exist in the same domain, each configured with different passwords.
It is the password required when promoting a switch from VTP client mode to VTP server mode.
It is used to prevent a switch newly added to the network from sending incorrect VLAN information to the other switches in the domain.
单选题
What is the purpose of typing o/r 0x2142 during a password recover procedure on a 2500 series router?（）
To restart the router.
To bypass the configuration in NVRAM.
To view the lost password.
To save the changes to the configuration.
To enter ROM Monitor mode.
单选题
By default, how often does a router running IGRP send its complete routing table to its neighbors?（）
Every 5 minutes
Every 90 seconds
Every 60 seconds
Every 30 seconds
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