【精品】03计算机网络习题.docx

【精品】03计算机网络习题.docxChapter 1 Computer Networks and the Internet
The ( ) is a worldwide computer network, that is, a network that interconnects millions of computing devices throughout the world.()
()是一个全球性计算机网络，即一个网 络设备互连世界各地数以百万计的电脑。
公共互联网
B Intranet内联网
C switch net D television net
Which kind of media is not a guided media?
()
A twisted-pair copper wir B a coaxial cable fiber D
Which kind of media is a guided media?( )
A geostationary satellite
B low-altitude satellite
C fiber optics
D wireless LAN
The units of data exchanged by a link-layer protocol are called ( ).
A Frames
B Segments
C Datagrams
D bit streams
Which of the following option belongs to the circuit-switched networks?()
A FDM B TDM
C VCnetworks L)B
( )makes sure that neither side of a connection overwhelms the other side by sending too many packets too fast.
A Reliable data transfer : I ： i I
C Congestion control D Handshaking procedure
( ) means that the switch must receive the entire packet before it can begin to transmit the first bit of the packet onto the outbound link.
A Store-and-fbrward transmission B FDM
C End-to-end connection D TDM
Datagram networks and virtual-circuit networks differ in that ( ).
A datagram networks are circuit-switched networks, and virtual-circuit networks are packet-switched networks.
B datagram networks are packet-switched networks, and virtual-circuit networks are circuit-switched networks.
C datagram networks use destination addresses and virtual-circuit networks use VC. numbers to forward packets toward their destination.
D datagram networks use VC. numbers and virtual-circuit networks use destination addresses to forward packets toward their destination.
In the following options, which one is not a guided media?()
A twisted-pair wire B fiber optics
C coaxial cable n i n
Processing delay does not include the time to ()•
A examine the packet?s header
B wait to transmit the packet onto the link
C determine where to direct the packet
D check bit-e