单选题
A network administrator needs to verify that switch interface 0/5 has been assigned to the Sales VLA.N. Which command will accomplish this task?（）
Show vlan
Show mac-address-table
Show vtp status
show spanning-tree root
show ip interface brief
单选题
You work as network consultant. Your customer, TestKing Inc, has a class C network license. TestKing wants you to subnet the network to provide a separate subnet for each of its 5 departments. Each subnet must support at least 24 hosts. Which network mask should you use?（）
255.255.255.192
255.255.255.224
255.255.255.240
255.255.255.248
255.255.255.252
255.255.255.254
单选题
You have a network that supports VLSM and you need to reduce IP address waste in your point to point WAN links. Which of the masks below would you use?（）
/38
/30
/27
/23
/18
/32
多选题
Which of the following statements regarding ISDN are correct?（）
Each ISDN B channel has transmission speeds of up to 64 kbps.
The ISDN B channel can carry video, voice or data.
The ISDN B channel transmission rate varies depending on the service used.
The ISDN D channel transmits control information.
The ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.
单选题
A routing table contains static, RIP, and IGRP routes destined to the same network with each route set to its default administrative distance. Which route will be the preferred route?（）
The RIP route
The static route
The IGRP route
All three will load balance.
多选题
What are the differences between full-duplex Ethernet and half-duplex Ethernet?（）
Half-duplex Ethernet operates in a shared collision domain.
Full-duplex Ethernet has a lower effective throughput.
Half-duplex Ethernet operates in a private collision domain.
Full-duplex Ethernet allows two-way communication.
Half-duplex Ethernet operates in a private broadcast domain.
多选题
What should be done prior to backing up an IOS image to a TFTP server?（）
Make sure that the server can be reached across the network.
Check the authentication for TFTP access to the server is set.
Assure that the network server as adequate space for the IOS image.
Verify file naming and path requirements.
Make sure that the server can store binary files.
Adjust the TCP window size to speed up the transfer.
单选题
A new network has been configured using OSPF as the routing protocol. With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?（）
point-to-point
Backbone area 0
Broadcast multicast
Non-broadcast multi-access
The DR/BDR process is done for all interface types
多选题
Identify three valid host addresses in the 192.168.27.0 network with a subnet mask of 255.255.255.240. （）
192.168.27.33
192.168.27.112
192.168.27.119
192.168.27.126
192.168.27.175
192.168.27.208
单选题
What is the function of the CSMA/CD algorithm in Ethernet technologies?（）
defines how the media is accessed
supplies a token to determine which host has access to the media
defines the encoding of electrical signals on the wire
determines the preamble bits
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