Chapter 2 Application Layer
1.
In a client-rver paradigm, a _______ program provides rvices to a (another) _______ program.
A) client; client
B) client; rver
C) rver; client
D) rver; rver
2.
In a client-rver paradigm
A) both the rver and the client must be running all the time.
B) both the rver and the client need to be running only when they are needed.
C) the rver must be running all the time but the client needs to be running only when it is needed.
D) the client must be running all the time but the rver needs to be running only when it is needed
3.
The first ction of a URL identifier is the __________.
A) protocol
两岁宝宝发育标准B) path
C) host
D) port
4.
A _______ document is a fixed-content document that is created and stored in a rver. The client can get a copy of the document only.
A) static
B) dynamic
C) active
D) None of the choices are correct
5.
_____________ 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 correct
6.
A _______ document is created by a Web rver whenever a browr requests the document.
A) static
B) dynamic
C) active
D) None of the choices are correct
7.
For many applications, we need a program or a script to be run at the client site. The ar
e called _______________ documents.
A) static
B) dynamic
C) active
D) None of the choices are correct
8.
HTTP us the rvices of _________.
A) UDP
B) IP
C) TCP
D) DNS
9.
In HTTP, the first line in a request message is called a _______ line; the first line in the respon message is called the ________ line.
A) request; respon
B) status; respon
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C) status; status
D) None of the choices are correct
10.
In a ___________ connection, one TCP connection is made for each request/respon.
A) persistent
B) nonpersistent
C) persistent or a nonpersistent
D) None of the choices are correct
11.
In a ___________ connection, the rver leaves the connection open for more requests after nding a respon.
A) persistent
B) nonpersistent
假如给我三天光明原文C) persistent or nonpersistent
D) None of the choices are correct
12.
In HTTP, _______ rver is a computer that keeps copies of respons to recent request
s.
A) a regular
B) a proxy
C) an auxiliary
D) a remote
13.
An HTTP request message always contains _______.
A) a header line and a body
B) a request line and a header line
C) a request line, a header line, and a body
D) a request line, a header line, a blank line, and a body
14.
Which of the following is prent in both an HTTP request line and a status line?
A) version number
B) URL
C) status code
D) method
15.
FTP us the rvices of ________.
A) UDP
B) IP
ROLAPC) TCP
D) none of the choices are correct
16.
In FTP, _________ well-known port(s) is (are) ud.
A) one
B) two
C) three
D) four
17.
During an FTP ssion the control connection is opened _______.
A) once
B) twice
C) many times
D) none of the choices are correct
18.
During an FTP ssion the data connection may be opened _______.
A) only once
B) only two times
C) as many times as needed
D) none of the choices are correct
19.
In FTP, a file can be organized into records, pages, or a stream of bytes. The are types of an attribute called _______.
A) file types
B) data structures
C) transmission modes
D) none of the choices are correct
20.
In FTP, there are three types of _______: stream, block, and compresd.光棍节礼物
A) file types
B) data types
C) transmission modes
D) none of the choices are correct
21.
In FTP, ASCII, EBCDIC, and image define an attribute called _______.
A) file type
B) data structure
C) transmission mode
D) none of the choices are correct
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22.
In FTP, when we _______, it is copied from the client to the rver.
A) retrieve a file
B) store a file自贡方言
C) open a file
D) none of the choices are correct
23.
充沛的反义词
In the common scenario, the electronic mail system needs _________________________.
A) two UAs, two MTAs and one MAA
B) two UAs, two MTAs and two MAAs
C) two UAs, two pairs of MTAs and a pair of MAAs
D) two UAs, two pairs of MTAs and a two pairs of MAAs
24.
________ provides rvice to the ur to make the process of nding or receiving a message easier.
A) An MTA
B) An MAA
C) A UA
D) None of the choices are correct
25.
An e-mail message contains the ________ and the __________.
A) header; envelop
