（完整版）川大软院计网选择题答案Chapter1（含答案）
1.1 In the following options, which does not define in protocol? ( D )
A the format of messages exchanged between two or more communicating
entities
B the order of messages exchanged between two or more communicating entities
C the actions taken on the transmission of a message or other event
D the transmission signals are digital signals or analog signals
1.2 In the following options, which is defined in protocol? ( A )
A the actions taken on the transmission and/or receipt of a message or other event
B the objects exchanged between communicating entities
博古简历
C the content in the exchanged messages
D the location of the hosts新三论
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1.3 An application can rely on the connection to deliver all of its data without error and in the proper order. The ntence describes (C ).
A flow control
大米发糕配方B congestion-control
C reliable data transfer
D connection-oriented rvice
1.4 The Internet’s connection-oriented rvice has a name, it is ( A ).
A TCP
B UDP
C TCP/IP
D IP
1.5 The Internet’s connectionless rvice is called ( B ).
A TCP
B UDP
C TCP/IP
D IP
1.6 Which of the following nodes belongs to the network core?C
A. a Web Server
B. a Host with Win2003 Server
C. a Router with NAT rvice
D. a Supernode on Skype Network
1.7 In the Internet, the equivalent concept to end systems is ( )A.
A hosts
B rvers
衡山旅游C clients
D routers
1.8 In the Internet, end systems are connected together by ( C ).
A copper wire
B coaxial cable
C communication links
D fiber optics
1.9 End systems access to the Internet through its (C ).
A modems
B protocols
C ISP
D sockets
1.10 In the following options, which belongs to the network core? ( B )
A end systems
B routers
C clients
D rvers
1.11 End systems, packet switches, and other pieces of the Internet, run ( D ) that control the nding and receiving of information within the Internet.
A programs
B process
C applications
D protocols
1.12 The internet allows ( D ) running on its end systems to exchange data with each other.
A clients applications
B rver applications
C P2P applications
D distributed applications
1.13 The protocols of various layers are called ( A ).
A the protocol stack
B TCP/IP
C ISP
D network protocol
1.14 In the OSI reference model, the upper layers of the OSI model are, in correct orderD
A Session, application, prentation
B Session, prentation, application
C Session, application, prentation, physical
D Application, prentation, ssion
1.15 The lower layers of the OSI model are, in correct orderD
A physical, system, network, logical
B physical, logical, network, system
C physical, transport, network, data link
D physical, data link, network, transport
1.16 The Internet Protocol (IP) generally corresponds to which OSI layer?A
A Network (layer three)
B Transport (layer four)
C Data link (layer two)
D Session (layer five)
1.17 What layer of the OSI model is designed to perform error detection functions?B
A Physical
B Data link
C Network
D transport
1.18 Which of the following protocol layers is not explicitly part of the Internet Protocol Stack? _____B____
A. application layer
B. ssion layer
C. data link layer
D. transport layer
1.19 The 5-PDU is called__A_
A. message
打篮球的日记
B. gment
C. datagram
D. frame
1.20 The Internet’s network layer is responsible for moving network-layer packets known as B( ) from one host to another.
A frame
B datagram
C gment
D message
1.21 Transport-layer packets are called:B
A. message
每次英语B. gment
C. datagram
D. frame
1.22 The units of data exchanged by a link-layer protocol are called ( A).
A Frames
B Segments
C Datagrams
D bit streams
1.23 There are two fundamental approaches to building a network core, ( B ) and packet switching.
A electrical current switching吃什么增加记忆力
B circuit switching
C data switching
D message switching
1.24 Datagram networks and virtual-circuit networks differ in that ( C ).
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 u destination address and virtual-circuit networks u
VC. numbers to forward packets toward their destination.
