is an error detection code that most data communication networks use。
A．CRC
B．Manchester Code
C．Huffman Code
D．4B/5B Code
Most IP layer-based proxy mechanisms，such as network address translation (NAT)，only supportuni-directional proxy，from the internal network to external network(the Interned．The proxvestablishes the communication channel by (71) IP addresses．The IP addresses must be (72) ．These proxy mechanisms prevent applications that must establish return data channels from establishing their data channels，such as，multimedia applications．IP layer-based proxy mechanisms need additional software (73) for each application that uses (74) channels． SOCKS identifies communication targets through domain names，overcoming the restriction of Usina private IP addresses．SOCKS can use domain names to establish communication between separate LANs，with (75) IP addresses．(66)A．manufacturingB．manipulatingC．conductD．implement
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For each blank, choose the best answer from the four choices and write down on the answer'sheet.(66)is a protocol that a host uses to inform. a router when it joins or leaves an Internet multicast group.(67)is an error detection code that most data communication networks use.(68)is an interior gateway protocol that uses a distance vector algorithm to propagate routing information.(69)is a transfer mode in which all types of information are organized into fixed form. cells on an asynchronous or non-periodic basis over a range of media.(70)is an identifier of a web page.A．ICMPB．SMTPC．IGMPD．ARP
Which of the following networks would MOST likely require EGP routing?()A. Networks that use OSPF in addition to static routesB. Networks with classless Internet domain routingC. Networks with multiple ISPsD. Networks that use encryption
is an error detection code that most data communication networks use。A．Cyclic Redundancy CodeB．Manchester CodeC．Huffman CodeD．4B/5B Code
Error detection schemes check errors in the data packets by reading which field frame IDs?()A.MTUB.PDUC.FCSD.FlagE.MACF.BRI
根据下面的文字资料回答 68～72 题For each blank．choose the best answerfrom the four choices and write down on the answer sheet．（ 1 ）is a protocol that a host uses toinform. a router when it joins or leaves an Internet muhicast group．（ 2 ） is an error detection code that most data communication networks use．（ 3 ）is an interior gateway protocol that uses a distance vector algorithm topropagate routing information．（ 4 ）is a transfer mode in which all types of information ate organized intofixed form. cells onan asynchronous or non－periodic basis over a range of media．（ 5 ）is an identifier of a web page．第68题：文中（ 1 ）处正确的答案是（ ）。A．SMTPB．ICMPC．RARPD．IGMP
Which of the following networks would MOST likely require EGP routing?（）A、Networks that use OSPF in addition to static routesB、Networks with classless Internet domain routingC、Networks with multiple ISPsD、Networks that use encryption
