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)

What are the benefits of wireless devices, What are the benefits of wireles...

What are the benefits of wireless devices One benefit is that if everyone uses standard, everyone can talk to anyone. Another benefit is that extensive use of any standard will

Multicasting, MULTICASTING : The answer to above problem is multicastin...

MULTICASTING : The answer to above problem is multicasting. It is the normal form of broadcasting. It acts like broadcasting however it does not broadcast frames automatically

Snort deployed in the dmz network, Let's consider the network shown in Figu...

Let's consider the network shown in Figure 1 where Snort is deployed. In Figure 1, why is Snort deployed in the DMZ instead of the Internal Network? In Figure 1, say True or

What is a management information base, What is a Management Information Bas...

What is a Management Information Base (MIB)? A Management Information Base is part of each SNMP-managed device. Every SNMP agent has the MIB database that having information ab

Name the protocol responsible for finding the mac address , a)  What does t...

a)  What does the "CD" mean in the CSMA/CD? How is it implemented in the Ethernet?   b)  Consider an Ethernet hub with 8 ports and an Ethernet switch with 8 ports. In both cases

Subtract two from number of hosts, Why do we require to subtract two from n...

Why do we require to subtract two from number of hosts?

Objectives of operating system for parallel computer, Objective : After...

Objective : After going through this part you will be sure to explain the features of software and operating systems for parallel computers. In particular you should be able

State about the bus topology, State about the Bus Topology Comments ...

State about the Bus Topology Comments 1 - Requires less cabling than a star network 2 - If there is a central cable problem entire netwo. rk goes down 3 - Less e

Classes and dotted decimal notation, The relationship between dotted decima...

The relationship between dotted decimal notation and classes is shown as follows. In class A the three octets managed to a host suffix. In class B the last most two octets ar

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