MCQ Questions on Application Layer in OSI/TCP/IP Model set-1

1) Which of the following is/are the important applications of application layer?

A. Electronic mail

B. World Wide Web

C. USENET

D. All of the above

2) The TCP/IP ............. corresponds to the combined session, presentation, and application layers of the OSI model.

A. session layer

B. presentation layer

C. application layer

D. None of the above

3) The .......... protocol is based on end-to-end delivery.

A. SMTP

B. TCP

C. IP

D. SCTP

4) The well-known port of SMTP server is ........

A. 110

B. 25

C. 50

D. 20

5) In SMTP header field, ............. is a summary of the message being sent which is specified by the sender.

A. Reply-to

B. Return-path

C. Subject

D. From

6) In SMTP herder field, .......... is added by the final transport system that deilvers the mail.

A. Reply-to

B. Return-path

C. Subject

D. From

7) In SMTP mail transaction flow, the sender SMTP establishes a TCP connection with the destination SMTP and then waits for the server to send a ..........

A. 220 service ready message

B. 421 service not available message

C. Both of the above

D. None of the above

8) In SMTP mail transaction flow, .......... is sent, to which the receiver will identify itself by sending back its domain name.

A. HELO

B. MAIL FROM

C. RCPT TO

D. DATA

9) ............ is a command-line tool designed for most UNIX-like operating systems, which does not define a method of transferring mail, but rather acts as a client/server that supports multiple mail protocols.

A. Recieivemail

B. Sendmail

C. MIME

D. POP

10) Which of the following is/are the components of sendmail?

A. Mail user agent(MUA)

B. Mail transfer agent(MTA)

C. Mail delivery agent(MDA)

D. All of the above

11) The ............ is the interface through which a user can read and send mail.

A. Mail user agent(MUA)

B. Mail transfer agent(MTA)

C. Mail delivery agent(MDA)

D. Mail send agent(MSA)

12) The ............ acts like a mail router, accepting messages from both MTAs and MUAs.

A. Mail user agent(MUA)

B. Mail transfer agent(MTA)

C. Mail delivery agent(MDA)

D. Mail send agent(MSA)

13) .......... uses a queuing system to manage inbound and outbound mail.

A. Recieivemail

B. Sendmail

C. MIME

D. POP

14) The sender SMTP establishes a TCP connection with the destination SMTP and then waits for the server to send a ...... service ready message.

A. 421

B. 320

C. 220

D. 120

15) ............ is limited to 7-bit ASCII text, with a maximum line length of 1000 characters.

A. SMTP

B. MIME

C. POP

D. MTA

16) A ........... message is one which can be routed through any number of networks that are loosely compliant with RFC2821 or are capable of transmitting RFC2821 messages.

A. SMTP

B. MIME

C. POP

D. MTA

17) There are ....... number of standard content types in MIME.

A. 5

B. 7

C. 9

D. 4

18) In MIME header field, ......... describes how the object within the body is to be interpreted.

A. content-type

B. content-transfer-encoding

C. content-description

D. content-id

19) In MIME header field, ............ describes how the object within the body was encoded in order that it be included in the message using a mail-safe form.

A. content-type

B. content-transfer-encoding

C. content-description

D. content-id

20) In a/an ............ of DNS resolver, the queried name server can return the best answer it currently has back to the DNS resolver.

A. Recursive queries

B. Iterative queries

c. Reverse queries

D. Inverse queries

Answers:

1) D. All of the above

2) C. application layer

3) A. SMTP

4) B. 25

5) C. Subject

6) B. Return-path

7) C. Both of the above

8) A. HELO

9) B. Sendmail

10) D. All of the above

11) A. Mail user agent(MUA)

12) B. Mail transfer agent(MTA)

13) B. Sendmail

14) C. 220

15) A. SMTP

16) B. MIME

17) B. 7

18) A. content-type

19) B. content-transfer-encoding

20) B. Iterative queries

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