Chapter 2  Application Layer
1.   
In a client-server paradigm, a _______ program provides services to a (another) _______ program.
A)    client; client
B)    client; server
C)    server; client
D)    server; server
2.   
In a client-server paradigm
A)    both the server and the client must be running all the time.
B)    both the server and the client need to be running only when they are needed.
C)    the server 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 server needs to be running only when it is needed
3.   
The first section of a URL identifier is the __________.
A)    protocol
B)    path
C)    host
D)    port
4.   
A _______ document is a fixed-content document that is created and stored in a server. 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 server whenever a browser 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. These are
called _______________ documents.
A)    static
B)    dynamic
C)    active
D)    None of the choices are correct
8.   
HTTP uses the services 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 response message is called the ________ line.
A)    request; response
B)    status; response
C)    status; status
D)    None of the choices are correct
10.   
In a ___________ connection, one TCP connection is made for each request/response.
A)    persistent
B)    nonpersistent
C)    persistent or a nonpersistent
D)    None of the choices are correct
11.   
In a ___________ connection, the server leaves the connection open for more requests after sending a response.
A)    persistent
B)    nonpersistent
C)    persistent or nonpersistent
D)    None of the choices are correct
12.   
In HTTP, _______ server is a computer that keeps copies of responses to recent requests.
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 bodyspring boot选择题
D)    a request line, a header line, a blank line, and a body
14.   
Which of the following is present in both an HTTP request line and a status line?
A)    version number
B)    URL
C)    status code
D)    method
15.   
FTP uses the services of ________.
A)    UDP
B)    IP
C)    TCP
D)    none of the choices are correct
16.   
In FTP, _________ well-known port(s) is (are) used.
A)    one
B)    two
C)    three
D)    four
17.   
During an FTP session the control connection is opened _______.
A)    once
B)    twice
C)    many times
D)    none of the choices are correct
18.   
During an FTP session 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. These 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 compressed.
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
22.   
In FTP, when we _______, it is copied from the client to the server.
A)    retrieve a file
B)    store a file
C)    open a file
D)    none of the choices are correct
23.   
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 service to the user to make the process of sending 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

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。