Application-Layer-Protocol

Question 1

Assume that you have made a request for a web page through your web browser to a web server. Initially the browser cache is empty. Further, the browser is configured to send HTTP requests in non-persistent mode. The web page contains text and five very small images. The minimum number of TCP connections required to display the web page completely in your browser is ______.

A
6
Computer-NetworksApplication-Layer-ProtocolGATE 2020Video-Explanation
Question 1 Explanation: 
In non-persistent HTTP connection for every object, there is a TCP connection established. Therefore, 1 TCP connection for text and 5 TCP connections for images required.
Hence, 1 Text + 5 Image = 6 Objects
Question 2

The protocol data unit (PDU) for the application layer in the Internet stack is

A
Segment
B
Datagram
C
Message
D
Frame
Computer-NetworksApplication-Layer-ProtocolGATE 2012
Question 2 Explanation: 
The PDU for Data Link layer, Network layer, Transport layer and Application layer are frame, datagram, segment and message respectively.
Question 3

Consider the following statements:
I. telnet, ftp and http are application layer protocols.
II.l EJB (Enterprise Java Beans) components can be deployed in a J2EE (Java2 Enterprise Edition) application server.
III. If two languages conform to the Common Language Specification (CLS) of the Microsoft.NET framework, then a class defined in any one of them may be inherited in the other.
Which statements are true?

A
l and II only
B
II and III only
C
l and III only
D
I, II and III
Computer-NetworksApplication-Layer-ProtocolGATE 2004-IT
Question 3 Explanation: 
If two languages conform to the common language specification (CLS) of the Microsoft.NET framework.
Then there are certain compliance rules which may be used for inheritance. So other statement (I) and (II) are True.
Question 4
Which of the following is/are example(s) of stateful application layer protocols?
(i) HTTP
(ii) FTP
(iii) TCP
(iv) POP3
A
(i) and (ii) only
B
(ii) and (iii) only
C
(ii) and (iv) only
D
(iv) only
Computer-NetworksApplication-Layer-ProtocolGATE 2016 [Set-1]Video-Explanation
Question 4 Explanation: 
Stateless protocol is a communications protocol in which no information is retained by either sender or receiver.
A protocol that requires keeping of the internal state on the server is known as a stateful protocol.
Stateless - HTTP, IP
Stateful - FTP, SMTP, POP3, TCP
TCP is stateful as it maintains connection information across multiple transfers, but TCP is a Transport layer protocol.
FTP and POP3 is stateful Application layer protocol.
Question 5

Which of the following protocol pairs can be used to send and retrieve e-mails (in that order)?

A
SMTP, MIME
B
SMTP, POP3
C
IMAP, POP3
D
IMAP, SMTP
Computer-NetworksApplication-Layer-ProtocolGATE 2019Video-Explanation
Question 5 Explanation: 
SMTP & POP3 are the protocols which are responsible for the email communication, SMTP is responsible for outgoing mail & POP3 is responsible for retrieving mail.
POP3: Post Office Protocol (Responsible for retrieve email)
SMTP: Simple Mail Transfer Protocol (Responsible for send Email)
IMAP: Internet Message Access protocol (Responsible for store and view)
MIME: Multi purpose Internet Mail Extensions (For media)
Question 6

What is the maximum size of data that the application layer can pass on to the TCP layer below?

A
Any size
B
216 bytes-size of TCP header
C
216 bytes
D
1500 bytes
Computer-NetworksApplication-Layer-ProtocolGATE 2008
Question 6 Explanation: 
Application Layer - Any size
Transport Layer - 65515 byte
Network layer - 65535 byte
Data link layer - 1500 byte
Question 7

Consider different activities related to email:

    m1: Send an email from a mail client to a mail server
    m2: Download an email from mailbox server to a mail client
    m3: Checking email in a web browser

Which is the application level protocol used in each activity?

A
m1: HTTP m2: SMTP m3: POP
B
m1: SMTP m2: FTP m3: HTTP
C
m1: SMTP m2: POP m3: HTTP
D
m1: POP m2: SMTP m3: IMAP
Computer-NetworksApplication-Layer-ProtocolGATE 2011
Question 7 Explanation: 
Sending an email will be done through user agent and message transfer agent by SMTP, downloading an email from mail box is done through POP, checking email in a web browser is done through HTTP.
Question 8
Which of the following protocols is built on client-server architecture and uses separate control and data connections between the client and the server?
A
FTP
B
SMTP
C
POP
D
TELNET
Computer-NetworksApplication-Layer-ProtocolCIL Part - B
Question 8 Explanation: 
FTP protocols is built on client-server architecture and uses separate control and data connections between the client and the server
There are 8 questions to complete.

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