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

How is final different from finally and finalize, How is final different fr...

How is final different from finally and finalize ()? Final is a modifier which can be applied to a class or a method or a variable. final class can't be inherited, final method

Cpe is an acronym for, Customer Premise Equipment (CPE) are devices physica...

Customer Premise Equipment (CPE) are devices physically located at the subscriber's premises. Includes both owned and leased equipment.

What is synchronous tdm, What is Synchronous TDM? In STDM, the multiple...

What is Synchronous TDM? In STDM, the multiplexer allocates exactly the same time slot to every device at all times, whether or not a device has anything to transmit.

State the characteristics of thinnet, Thinnet Characteristics Short...

Thinnet Characteristics Shorter range (185 meters) as well as smaller capacity Bus topology LAN Connectors and cables include: thin coaxial cable, NICs and BNC-T

Lan hardware and packet filtering, LAN HARDWARE AND PACKET FILTERING: ...

LAN HARDWARE AND PACKET FILTERING: The diagram below explain the LAN hardware LAN INTERFACE:  LAN interface operates all details of frame reception and transmis

Determine 10base-fl- fiber link ethernet, 10Base-FL: Fiber Link Ethernet ...

10Base-FL: Fiber Link Ethernet Utilizes star topology to connect stations to a hub External transceiver entitle as a fiber-optic MAU connects processing device to fib

Time out - transport layer, Time out The  protocols  name Go Back  N i...

Time out The  protocols  name Go Back  N is  derived  from the  sender behaviour in the  presence  of lost or  overly  delayed packets. A timer will again  be used  to recover

Error detection in lrc - performance, LRC - Performance Detects ev...

LRC - Performance Detects every burst errors up to length n (number of columns) If two bits in one data unit are damaged as well as two bits in exactly same positions

State control frame - solicit successor, Control Frame: solicit_successor ...

Control Frame: solicit_successor Periodically ask for any station to link by sending solicit_successor Token with sender's addr and successor's addr wait 2 (as in

Ip, what is dce

what is dce

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