计算机⽹络英⽂题库（附答案）chapter2解析
Chapter 2 Application Layer
1. In the following four descriptions, which one is correct?
A In C/S architecture, clients communicate with each other directly.
B In C/S architecture, client has a fixed well-known address.
C In P2P architecture, peers communicate with each other directly.
D In P2P architecture, peer has a fixed well-known address.
2. In the context of a communication session between a pair of process, the process that initiates the communication is labeled as the , the process that waits to be contacted to begin the session is labeled as the .
A client process, server process
B sending process, receiving process
C input process, output process
D communicating process, connecting process
3. A socket is the interface between within a host.
A the network layer and the link layer
B the link layer and the physical layer
C the application layer and the transport layer
D the transport layer and the network layer
4. In the following applications, which one is a loss-tolerant application?
A E-mail
B file transfer
C instant messaging
D real-time audio
5. In the following applications, which one is a bandwidth-sensitive application?
A E-mail
B web application
C real-time audio
D file transfer
6. The service of TCP can’t guarantee .
A delivery of all data without error
B delivery of all data in the proper order
C the rate of delivery
D congestion control
7. In the following applications, which one uses UDP?
A E-mail
B web application
C file transfer
D DNS
8. In the following descriptions about HTTP, which one is not correct?
A HTTP uses non-persistent connections in its default mode.
B HTTP uses TCP as its underlying transport protocol.
C HTTP is a stateless protocol.
D HTTP is client-server architecture.
9. Suppose a web page consists of a base HTML file, 5 JEPG images and a java applet, and also suppose HTTP uses persistent connection without pipelining, the total response time is .
A 2RTT
B 8RTT
C 12 RTT
D 14RTT
10. In HTTP response message, if the requested HTTP protocol version is not supported, the status code is .
A 200
B 301
C 400
D 505
1~5 CACDC 6~10 CDABD
11. The port number of web application is .
A 25
B 20
C 80
D 53
12. A network entity that satisfies HTTP requests on the behalf of an origin web server is .
A server farm
B server stack
C proxy server
D edge server
13. In the following descriptions about persistent connection, which one is not correct?
A The server leaves the TCP connection open after sending a response.
B Each TCP connection is closed after the server sending one object.
C There are two versions of persistent connection: without pipelining and with pipelining.
D The default mode of HTTP uses persistent connection with pipelining.
14. FTP uses two parallel TCP connections to transfer a file, there are .
A control connection and data connection
B receiving connection and sending connection
C client connection and sever connection
D program connection and process connection
15. In the following descriptions about FTP, which one is correct?
A FTP is p2p architecture.
B FTP sends its control information out-of-band.
C FTP uses persistent connection.
D FTP is a stateless protocol.
16. In the commands of FTP, which one does not have parameter?
A USER
peerB PASS
C LIST
D STOR
17. The Internet mail system has three components which they are .
A user agent, SMTP, POP3
B SMTP, POP3, IMAP
C user agent, SMTP, IMAP
D user agent, SMTP, mail server
18. If the status code in HTTP response message is 404, it means .
A Request succeeded.
B The requested document doesn’t exit on this server.
C This is a generic error code indicating that the request could not be understood by the server.
D Requested object has been permanently mover.
19. Comparison HTTP with SMTP, the correct is .
A HTTP is a push protocol, and SMTP is a pull protocol.
B In the default mode, both of them use persistent connection.
C HTTP places all of the message’s objec ts into one message, and SMTP sends every object
one by one.
D HTTP requires each message to be in 7-bit ASCII format, and SMTP doesn’t impose this restriction.
20. The headers in the MIME message must include except .
A From
B Content-type
C Content-transfer-encoding
D MIM
E version
11~15CCBAB 16~20 DDBBD
21. In the following protocol, which one is stateless?
A POP3
B SMTP
C FTP
D IMAP
22. DNS means .
A Data Name System
B Data National System
C Domain Name System
D Domain National System
23. There are three classes of DNS server except .
A Root DNS server
B Local DNS server
C TL
D server D Authoritative DNS server
24. DNS provides some services except .
A Host aliasing
B Mail server aliasing
C Load distribution
D A single point of failure
25. There are three architectures for locating content in P2P file sharing, KaZaA uses .
A Centralized Directory （Napster）
B Query Flooding(Gnutella)
C Exploiting Heterogeneity (p141)
D Incentive Priorities
26. There are three architectures for locating content in P2P file sharing, Napster uses .
A Centralized Directory (p137)
B Query Flooding
C Exploiting Heterogeneity
D Incentive Priorities
27. The following architectures in P2P file sharing, which is an overlay network?
A Centralized Directory
B Query Flooding(p139)
C Exploiting Heterogeneity
D Incentive Priorities
28. The time it takes for a small packet to travel from client to server and then back to the client is .
A round-travel time
B next-hop time
C round-trip time
D prefix-matching time
29. Suppose A ( with a Web-based e-mail account ) sends a message to B ( who accesses his mail server using POP3), which application-layer protocol is not used?
A HTTP
B SMTP
C POP3
D IMAP
30. In the four following options, which protocol is included in Mail Access Protocol?
A SMTP
B DHCP
C IMAP
D FTP
31. In FTP commands, is used to send user password to the server.
A User
B Pass
C Retr
D Stor
32. The function of the additional header field in MIME Content-Type is .
A to convert the message body to its origin non-ASCII form
B to determine what actions it should take on message body
C to send an E-mail to the receiving user agent
D to indicate what type the message is
33. In the four following options, which application is organized as hybrid of C/S and P2P architecture?
A E-mail
B OICQ
C File transfer
D Web application
34. In the four following options, which is not a centralized DNS design’s problem?
A a single point of failure
B traffic volume

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。