DNS | SMTP Vs POP3 | HTTP Vs FTP

Application Layer Protocols-

 

Important application layer protocols are-

 

 

  1. Domain Name Service (DNS)
  2. Hyper Text Transfer Protocol (HTTP)
  3. Simple Mail Transfer Protocol (SMTP)
  4. Post Office Protocol (POP)
  5. File Transfer Protocol (FTP)

 

In this article, we will compare all these application layer protocols.

 

Comparison of Application Layer Protocols-

 

The following table compares all the important application layer protocols-

 

DNS HTTP SMTP POP FTP
Stateful / Stateless Stateless Stateless Stateless Stateful Stateful
Transport Protocol Used UDP TCP TCP TCP TCP
Connectionless / Connection Oriented Connectionless Connectionless Connection Oriented Connection Oriented Connection Oriented
Persistent / Non-persistent Non-persistent HTTP 1.0 is non-persistent.

HTTP 1.1 is persistent.

Persistent Persistent Control connection is persistent.

Data connection is non-persistent.

Port Number Used 53 80 25 110 20 for data connection.

21 for control connection.

In band / Out-of-band In band In band In band In band Out-of-band

 

Next Article- Cryptography and Network Security

 

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Summary
DNS | SMTP Vs POP3 | HTTP Vs FTP
Article Name
DNS | SMTP Vs POP3 | HTTP Vs FTP
Description
In computer networks, Application layer protocols are- DNS, HTTP, SMTP, POP, FTP. DNS Vs SMTP Vs POP3 Vs HTTP Vs FTP. This article compares all these application layer protocols.
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Publisher Name
Gate Vidyalay
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