Which layer in the Internet protocol stack doesn't a router process? ( )
A. the transport layer
B. the network layer
C. the link layer
D. the physical layer
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Which of the following is the decimal for the IP address 11000000 00110100 00000000 00001111? ( )
A. 192.52.0.16
B. 192.51.0.15
C. 128.52.0.15
D. 192.52.0.15
What is the name of a link-layer packet? ( )
A. message
B. segment
C. datagram
D. frame
[ 判断题 ] HTTP服务器是无状态的,不保存客户信息。Cookie允许Web站点跟踪、识别用户;服务器可以限制用户访问,或把内容与用户身份关联。这样,Cookie不会造成用户隐私问题。( )
A. 对
B. 错
[ 判断题 ] HTTP的服务端口是80。 ( )
A. 对
B. 错