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)

command saves the configuration stored in ram to nvram, Which command save...

Which command saves the configuration stored in RAM to NVRAM Ans) copy running-config startup-config is the command which saves the configuration stored in RAM to NVRAM

Connectionless protocol at the transport layer, User Datagram Protocol - UD...

User Datagram Protocol - UDP is a connectionless oriented transport protocol for use when the upper layers give error-recovery and reliability. UDP does not sequence data or re-ass

Requests types in distributed enrollment protocol , Control Commands: The ...

Control Commands: The STAT command is used as a way for the client to confirm that the server is still responding properly. The server must simply send a positive command res

Explain the term - carrier sense multiple access, What is use of Carrier se...

What is use of Carrier sense multiple access Carrier sense multiple access with collision detection (CSMA/CD) is a form of medium access control in which a station listens to

What do you understand by service access point, Q. How two adjacent layers ...

Q. How two adjacent layers communicate in a layered network or what do you understand by Service Access Point? Ans: In layered network, each layer has several entities and enti

Explain the term ftp- file transfer protocol, Explain the term FTP: File T...

Explain the term FTP: File Transfer Protocol A very common method of moving files between two Internet sites. FTP is a special way to log in to another Internet site for pur

Advantages and disadvantages of client-server method, 1. Write a critical a...

1. Write a critical analysis of the client/server vs. service architecture method for developing service architectures.  You must explain what the client/server method is in terms

Describe the depth penetration method for a crt, Question: (a) What do ...

Question: (a) What do you understand by the following terms related to LCDs: Reflective LCDs Backlit LCDs (b) By using an example, explain the main steps of the B

Set up to use pvm run and complie, PVM uses two environment variables when ...

PVM uses two environment variables when starting and running. Every PVM user needs to set these two variables to use PVM. The initial variable is PVM_ROOT, which is set to the loca

What is error control, What is Error Control ? Error control is both er...

What is Error Control ? Error control is both error detection and error correction. It allows the receiver to inform the sender of any frames lost or damaged in transmission an

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