單項(xiàng)選擇題The Testking network is implementing dialup services for their remote employees.Testking uses several different Layer 3 protocols on the network. Authentication ofthe users connecting to the network is required for security. Additionally, some employees will be dialing long distance and will need callback support.Which protocol is the best choice for these remote access services?（）

A.802.1
B.Framerelay
C.HDLC
D.PPP
E.SLIP
F.PAP


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Which dynamic routing protocol should be recommended for the Testking networkshown in the graphic above?（）

A. OSPF
B. RIP version 1
C. RIP version 2
D. IGRP
E. EIGRP

2.多項(xiàng)選擇題A brand new network application is required for the Acme Company, and they are considering the use of a connectionless service. What are the characteristics of a connectionless service?（）

A. It uses a Reliable transport mechanism.
B. It uses a Non-reliable transport mechanism
C. It is less bandwidth-intensive than connection oriented services
D. it uses handshaking

5.單項(xiàng)選擇題A standard IP access list is applied to an Ethernet interface of a router. What does this standard access list filter on?（）

A. The source and destination addresses
B. The destination port number
C. The destination address
D. The source address
E. All of the above

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TestKing.com has allocated the IP add 199.144.27.0 is its network, to provide flexibility for the LAN design, a subnet mask of 255.255.255.240 has been chosen. Which of the following address can be assigned to LAN on the resulting subnets.（）

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What is a global command?（）

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What is the purpose of typing o/r 0x2142 during a password recover procedure on a 2500 series router?（）

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