（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
C the content in the exchanged messages
D the location of the hosts
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
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
C clients
D routers
1.8 In the Internet, end systems are connected together by ( C ).
A copper wirethe bell curve
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
世界大学排名2013排行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.
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reducedA programs
B process
C applications
D protocols
qqy1.12 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
毫伦琴A Network (layer three)
B Transport (layer four)
C Data link (layer two)汉普森少儿英语怎么样
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
stolenB. ssion layer
C. data link layer
D. transport layer
1.19 The 5-PDU is called__A_
A. message
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
B. gment
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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
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.
