1、D) the client must be running all the time but the server needs to be running only when it is needed3. The first section of a URL identifier is the _.A) protocolB) pathC) hostD) port4. A _ document is a fixed-content document that is created and stored in a server. The client can get a copy of the d
2、ocument only.A) staticB) dynamicC) activeD) None of the choices are correct5. _ is a language for creating a static document.A) Extensible Style Language (XSL)B) Hypertext Markup Language (HTML)C) Extensible Markup Language (XML)D) All choices are correct6. A _ document is created by a Web server wh
3、enever a browser requests the document.7. For many applications, we need a program or a script to be run at the client site. These are called _ documents.8. HTTP uses the services of _.A) UDPB) IPC) TCPD) DNS9. In HTTP, the first line in a request message is called a _ line; the first line in the re
4、sponse message is called the _ line.A) request; responseB) status;C) status; status10. In a _ connection, one TCP connection is made for each request/response.A) persistentB) nonpersistentC) persistent or a nonpersistent11. In a _ connection, the server leaves the connection open for more requests a
5、fter sending a response.C) persistent or nonpersistent12. In HTTP, _ server is a computer that keeps copies of responses to recent requests.A) a regularB) a proxyC) an auxiliaryD) a remote13. An HTTP request message always contains _.A) a header line and a bodyB) a request line and a header lineC) a
6、 request line, a header line, and a bodyD) a request line, a header line, a blank line, and a body14. Which of the following is present in both an HTTP request line and a status line?A) version numberB) URLC) status codeD) method15. FTP uses the services of _.D) none of the choices are correct16. In
7、 FTP, _ well-known port(s) is (are) used.A) oneB) twoC) threeD) four17. During an FTP session the control connection is opened _.A) onceB) twiceC) many times18. During an FTP session the data connection may be opened _.A) only onceB) only two timesC) as many times as needed19. In FTP, a file can be
8、organized into records, pages, or a stream of bytes. These are types of an attribute called _.A) file typesB) data structuresC) transmission modes20. In FTP, there are three types of _: stream, block, and compressed.B) data types21. In FTP, ASCII, EBCDIC, and image define an attribute called _.A) fi
9、le typeB) data structureC) transmission mode22. In FTP, when we _, it is copied from the client to the server.A) retrieve a fileB) store a fileC) open a file23. In the common scenario, the electronic mail system needs _.A) two UAs, two MTAs and one MAAB) two UAs, two MTAs and two MAAsC) two UAs, two
10、 pairs of MTAs and a pair of MAAsD) two UAs, two pairs of MTAs and a two pairs of MAAs24. _ provides service to the user to make the process of sending or receiving a message easier.A) An MTAB) An MAAC) A UA25. An e-mail message contains the _ and the _.A) header; envelopB) header; bodyC) envelop;26
11、. In the Internet, an e-mail address consists of two parts: a _ and a _.A) local part; domain nameB) global part;C) label;D) local part; label27. _ is a supplementary protocol that allows non-ASCII data to be sent through e-mail.A) SMPTB) MPEGC) MIMED) POP28. The formal protocol that defines the MTA client and server i
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