For each blank,choose the best answer from the four choices and write down on the answer sheet.
(1) is a protocol that a host uses to inform a router when it joins or leaves an Internet multicast 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 to propagate routing information.
(4) 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.
(5) is an identifier of a web page.
A.4B/SB
B.CRC
C.Manchester Code
D.Huffman Code
A.64
B.47
C.48
D.36
A.解码
B.编码
C.调制
D.解调
A.28
B.210
C.216
D.232
A.传输层
B.会话层
C.表示层
D.应用层
A.应用管
B.管理控制
C.应用之间消息传递
D.A、B和C
A.TCP
B.IPsec
C.L2TP
D.SSL
A.A类
B.B类
C.C类
D.D类
A.文本文件
B.二进制可执行文件
C.数据压缩文件
D.以上全部
A.并行总线
B.串行总线
C.通用接口
D.通用串行接口总线
A.模块的独立性
B.模块类型的划分
C.软件结构定义
D.软件生命周期
A.低三层组成
B.高三层组成
C.中间三层组成
D.以上都不对