Electronic mail - application layer, Computer Networking

Assignment Help:

Electronic Mail

One  of the  most popular internet  services is electronic mail ( e mail). At  the beginning  of the internet era teh message sent by  electronic  mail were short and  consisted of text  only they let people  exchange  quick  memos. Today  electronic  mail is such  more  complex. It allows  a message  to include  text audio  and video  it also  allows one message to sent  to one or more  recipients.

Figure presents a high  level  view of the internet  of the  internet mail  system. It has  three major components user agents mail servers, and  the simple  mail  transfer protocol (SMTP). We now  assume  that a  sender  heena sending an e mail  message  to a recipient Harish. User  agents allow users to read reply to forward save and compose message. When  server when Harish  wants to read a message his user agent retrieves the message from his mailbox in his mail server.

262_electronic mail.jpg

                                                                figure A high  level view of the Internet e- mail system

 

Each recipient  such as harsh  has a mailbox  located in one of the servers. Harish  mail box manages  and maintains the messages that have been sent to him. A  messages  starts its journey in the sender user agent  travels to the sender mail server and travels  to the recipient mail  server where  it is deposited in the recipient mail box  when  box  authenticates Harish  ( with  user name and password).  If Heena serve cannot  deliver mail to  Harish  server Heena  server holds the message in a message  queue  and attempts to transfer the message  later.


Related Discussions:- Electronic mail - application layer

What is the role of ieee in computer networking, What is the role of IEEE i...

What is the role of IEEE in computer networking? IEEE, or the Institute of Electrical and Electronics Engineers, is an organization composed of engineers that issues and manage

Hyper text transfer protocols ( http), Hyper  Text Transfer Protocols ( HT...

Hyper  Text Transfer Protocols ( HTTP) The Hyper text  protocols ( HTTP) is at  the heart  of the  web. If a browser  developer follows  the rules  of the HTTP, the  browser w

State in brief about the information access intranet, State in brief about ...

State in brief about the Information Access Intranet This type of Intranet is the type commonly found on the World Wide Web. The static web page may include information on

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

Cipher password guess-cryptography, a. If a password to a cipher is exactly...

a. If a password to a cipher is exactly 8 characters long, and each character can be selected from [0-9], [a-z], and [A-Z], how many different passwords are possible? b. Suppose

Ring token, what is logical ring maintenance and how does it work>?

what is logical ring maintenance and how does it work>?

How is it different than bootp or rarp, Bootp protocol normally use it in d...

Bootp protocol normally use it in dhcp protocol, it is configured manually in order to give ip add or there relvent host. Rarp is a work just opposite of Arp. Rarp stand for rev

Determine about the internet, Determine about the Internet The I...

Determine about the Internet The Internet as a source of information and reference material, browsing the World Wide Web (WWW) and Newsgroups for the latest gossip or sh

What is the internal ip address, What is the internal IP address There ...

What is the internal IP address There is a separate set of IP address for a company's internal use, more popularly known as "internal IP address" or subnet IP address. This IP

Compute the number of lost packets of the down-stream, A mobile host (MH) i...

A mobile host (MH) is connected to a WLAN access network that uses MIP for mobility support. Consider that the RTTs between MH and HA are 0.3s while RTTs within a L2 subnet are 80

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