(61) A．80
    B．23
    C．25
    D．21
(62) A．TCP
    B．IP
    C．HTTP
    D．UDP
(63) A．GET
    B．POST
    C．REQUST
    D．SET
●NetXray的功能是  (64)  。
(64) A．捕獲并分析數(shù)據(jù)包
    B．發(fā)送數(shù)據(jù)包
    C．網(wǎng)絡管理查看功能
    D．A、B和C
●DHCP客戶端是使用地址  (65)  來申請一個新的IP地址的。
(65) A．0．0．0．0
    B．10．0．0．1
    C．127．0．0．1
    D．255．255．255．255
●In the following essay，each blank has four choices．Choose the most suitable one from the four choices and write down in the answer sheet．
A   (66)   is basically an end point of a communication link between two applications．Sockets that extend over a network connect two or more applications running on separate computers at tached to the network．A socket  (67)  two addresses：  (68)  ．Sockets provide a  (69)  communication channel between one or more systems．
There are stream and datagram sockets separately using TCP and  (70)  ．
(66) A．program
    B．UDP
    C．socket
    D．TCP
(67) A．is made of
    B．composed of
    C．is composed of
    D．is consisted of
(68) A．Email address and IP address
    B．MAC address and port address
    C．MAC address and IP address
    D．port number and IP address
(69) A．full-duplex
    B．half-duplex
    C．simplex
    D．complex
(70) A．FTP
    B．UDP
    C．IP
    D．HTTP
●Ipv6 is  (71)  for "Internet Protocol Version 6"。Ipv6 is the "next generation" protocol design by the IETF to  (72)  the current version Inernet Protocol,IP Version 4．Most of today's internet uses Ipv4,which is now nearly twenty years old．Ipv4 has been remarkably resilient in spite of its age,but it is beginging to have problems．Most importantly ,there is a growing  (73)   of Ipv4 addresses,which are needed by all new machines added to the Internet．Ipv6 fixs a number of problems in Ipv4,shch as the  (74)   number of available Ipv4 addresses．It also adds many improvements to Ipv4 in areas such as souting and network autoconfiguration．Ipv6 is expected to gradually replace Ipv4 ,with the two coexing for a number of years during a transition   (75)  ．
(71) A．short
       B．a(chǎn)bbreviate
       C．a(chǎn)bbreviation
       D．initial
(72) A．substitution
       B．replace
       C．switchover
       D．swap
(73) A．scarcity
       B．lack
       C．deficiency
       D．shortage
(74) A．restrict
       B．limited
       C．imprison
       D．confine
(75) A．period
       B．days
       C．epoch
       D．phase

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