The Ezonexam network administrator needs to a switch named V

【名词&注释】

路由器(router)、物理层(physical layer)、帧中继(frame relay)、数据链路层(data link layer)

[单选题]The Ezonexam network administrator needs to a switch named VE1 to become the root bridge for a redundant path switched network. What can be done to ensure that VE1 will always assume the role as the root bridge?

A. Assign the switch a higher MAC address than the other switches in the network have
B. Establish a direct link from the switch to all other switches in the network
C. Configure the switch full-duplex operation and configure the other switches for half-duplex operation
D. Configure the switch so that it has lower priority than other switches in the network
E. None of the above

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学习资料：

[单选题]OSI七层模型中，“段”是哪一层数据封装的名称（）

A. 物理层
B. 数据链路层^{(data link layer)}
C. 网络层
D. 传输层

[单选题]为了查看路由器的E0端口上，是否挂接了访问权限表，应该使用的命令是（）

A. show access-list
B. show interface e0
C. show ipinterface e0
D. show e0

[单选题]为了连接“帧中继”线路，网络中的路由器需要提供的端口类型为（）

A. FastEthernet
B. Serial
C. BRI
D. Ethernet

[单选题]路由器上，设置端口速率的命令是（）

A. clock rate
B. bandwidth
C. set
D. encap

[多选题]You have just installed a new web server on the Ezonexam network. You are required to ensure that the web server is accessible from the Internet. The network uses private addressing, so an IP-to-registered address mapping is required.To do this, you enter the following command:

A. Ezonexam(config) ip nat inside source static 192.168.2.1
B. 198.18.1.254
C. You unsuccessfully try to ping the Internet from a PC host on the LAN. During the troubleshooting process, you enter the "show ip nat translations" command but the output is blank.
D. What is the most likely cause of the problem?
E. The keyword overload is missing from the command.
F. The NAT pool must be defined first.
G. An access list must be defined to create static NAT translations.
H. The interfaces must be configured for NAT.
I. None of the above

[多选题]Using a subnet mask of 255.255.255.224, which of the IP addresses below can you assign to the hosts on this subnet? (Select all that apply)

A. 16.23.118.63
B. 87.45.16.159
C. 92.11.178.93
D. 134.178.18.56
E. 192.168.16.87
F. F. 217.168.166.192

[单选题]A receiving host has failed to receive all of the segments that it should acknowledge.What can the host do to improve the reliability of this communication session?

A. Start a new session using UDP
B. Obtain a new IP address from the DHCP server
C. Use a different source port for the session
D. Decrease the sequence number
E. Decrease the window size

[单选题]The Ezonexam LAN is upgrading all devices to operate in full duplex. Which statement is true about full-duplex Ethernet in comparison to half-duplex Ethernet?

A. Full-duplex Ethernet uses two wires to send and receive. Half-duplex Ethernet uses one wire to send and receive
B. Full-duplex Ethernet consists of a shared cable segment. Half-duplex Ethernet provides a point-to-point link
C. Full-duplex Ethernet can provide higher throughout than can half-duplex Ethernet of the same bandwidth
D. Full-duplex Ethernet uses a loopback circuit to detect collisions. Half-duplex ethernet uses a jam signal
E. None of the above

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