Chapter 1 Computer Networks and the Internet networks use VC. numbers to forward packets toward their
1．The ( ) is a worldwide computer network, that is, a network that destination.
interconnects millions of computing devices throughout the world. D datagram networks use VC. numbers and virtual-circuit networks
ppt3 use destination addresses to forward packets toward their destination.
A public Internet 9 ．In the following options, which one is not a guided media? ( )
B Intranet A twisted-pair wire
C switch net B fiber optics
D television net C coaxial cable
2 ．Which kind of media is not a guided media? ( ) D satellite
A twisted-pair copper wire 10．Processing delay does not include the time to ( ).
B a coaxial cable A examine the packet’s header
C fiber optics B wait to transmit the packet onto the link
D digital satellite channel C determine where to direct the packet
3 ．Which kind of media is a guided media? ( ) D check bit-error i
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