计算机网络英文题库,计算机网络英文题库附答案chapter

Chapter 1 Computer Networks a n d t h e I n t e r n e t 1．The ( ) is a worldwide

computer network, that is,

a network that interconnects millions of computing devices throughout the world. ppt3 A public Internet B Intranet C switch net D television net 2．Which kind of media is not a guided media? ( ) A twisted-pair copper wire B a coaxial cable C fiber optics D digital satellite channel

3．Which kind of media is a

guided media? ( )

A geostationary satellite

B low-altitude satellite

C fiber optics

D wireless LAN 4．The units of data exchanged

by a link-layer protocol are

called ( ). A Frames

B Segments

C Datagrams

D bit streams

5．Which of the following

option belongs to the

circuit-switched networks?

( )

A FDM

B TDM

C VC networks

D both A and B

6．( )makes sure that neither