Simple mail transfer protocol ( smtp), Computer Networking

Assignment Help:

Simple Mail Transfer Protocol ( SMTP)

SMTP is the principal  application layer protocol for  internet electronic  mail. It uses the reliable data transfer  service of TCP  to transfer  mail from  the sender mail  from the  sender small server the recipient mail  server. SMTP has two sides a client side which  executes on the sender mail server and a server side which executes on the recipient mail  server both  the client  and server sides  of SMTP run on  every mail server when  a mail server  sends mail to other mail  servers it acts  as an SMTP client. When  a mail  server  receive  mail  from other mail  servers it acts as an SMTP  server.

To  illustrate the basic  operation of SMTP let go through  a common  scenario  suppose  heena  wants  to send Harish a simple  ASCII  message to Harish.

1.Heena  invokes her user agent for e mail provides Harish e mail address compose  a message and instructs the user agent to send to message.

2.Heena  user agent sends the message to her mail server wher it is placed in  message  queue.

3.The client side of SMTP running  on heena  mail server see the message in the message queue. It  opens TCP connection to an SMTP server  running on Harish  mail server.

4. After  some initial  SMTP handshaking the SMTP receives the message Harish  mail server then  places the message in Harish mail box.

5.Harish  invokes  his  user agent  to read the message at his convenience.

 

 

 


Related Discussions:- Simple mail transfer protocol ( smtp)

Describe about radio waves, Radio Waves - Frequency ranges: 3 KHz to 1...

Radio Waves - Frequency ranges: 3 KHz to 1 GHz - Omni directional - Susceptible to interference by other antennas utilizing same frequency or band - Ideal for long-di

Networking concepts and applications, iLab 2: Office Network Expansion ...

iLab 2: Office Network Expansion Connect to the iLab here. Submit your assignment to the Dropbox located on the silver tab at the top of this page. (See "Due Da

What are the categories of traditional ethernet, Categories of traditional ...

Categories of traditional Ethernet a)  Baseband - digital signals using Manchester encoding b) 10Base2, 10-Base-T, 10Base5, 10Base-FL c)  First number signifies data rate

Error detecting code - parity bit, Error Detecting Code - Parity bit: ...

Error Detecting Code - Parity bit: The general idea for achieving error detection and correction is to add some redundancy (i.e., some extra data) to a message, which receiver

Multi tasking environment, Multi Tasking Environment Multi tasking exp...

Multi Tasking Environment Multi tasking exploits parallelism by: 1)  Concurrently using the multiple functional units 2)  Pipelining functional units are pipe line toget

The received message - application layer , The Received Message If  we...

The Received Message If  we didn't mention  another  class of header lines that are  inserted by the SMTP receiving  server. The receiving  server upon receiving a message wit

Explain typical network topologies, Question: a) Explain briefly three ...

Question: a) Explain briefly three typical network topologies giving one advantage and one disadvantage of each topology. Explain the three topologies with appropriate diagrams

What is the difference among tftp and ftp application, What is the differen...

What is the difference among TFTP and FTP application layer protocols? The Trivial File Transfer Protocol (TFTP) permits a local host to get files from a remote host but does n

What are the concerns of the physical layer, What are the concerns of the P...

What are the concerns of the Physical Layer? Physical layer coordinates the functions needed to transmit a bit stream over a physical medium. a. Physical characteristics of in

Explain the meaning and use of the z-index property in dhtml, QUESTION ...

QUESTION (a) In CSS, each element in a document is considered to be in an invisible box. Give three ways how to make the box visible (b) (i) Explain the meaning and use of t

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd