单选题
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 socket 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 (31) computers attached to the net-work. A socket (32) two addresses: (33) . Sockets provide a (34) communication channel between one or more systems. There are (35) sockets separately using TCP and UDP.
单选题
A. unique B. separate C. same D. dependent
【正确答案】
B
【答案解析】
单选题
A. is made of B. composed of C. is composed of D. is consisted of
【正确答案】
C
【答案解析】
单选题
A. Email address and IP address B. MAC address and port address C. MAC address and IP address D. port number and IP address
【正确答案】
D
【答案解析】
单选题
A. full-duplex B. half-duplex C. simplex D. complex
【正确答案】
A
【答案解析】
单选题
A. message and packet B. packet and frame C. stream and datagram D. flow and block