F．or 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．ICMP

B．SMTP

C．IGMP

D．ARP

[单选题]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

[单选题]For each blank, choose the best answer from the four choices and write down on the answer sheet.(71) is a channel's capacity which directly reflects the data transfer rate of the channel.(72) functions in a NetWare network which is used to define ad

[单选题]F．or 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

[单选题]Read the following text. Choose the best word(s) for each numbered blank an

[单选题]Read the following text. Choose the best word(s) for each numbered blank an

[单选题]Read the following text. Choose the best word(s) for each numbered blank an

[单选题]Read the following text. Choose the best word(s) for each numbered blank an

[单选题]Read the following text. Choose the best word(s) for each numbered blank an

[单选题]Read the following text. Choose the best word(s) for each numbered blank an

[单选题]Read the following text. Choose the best word(s) for each numbered blank an