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

Basic working of spanning tree, Q. Basic working of Spanning Tree? Spa...

Q. Basic working of Spanning Tree? Spanning Tree - Redundant bridges may be installed to provide reliability - To prevent infinite looping of packets between bridges,

use dijkstras shortest-path algorithm compute short path, Consider the fol...

Consider the following network example. With the indicated link costs along each link in the figure, use Dijkstra's shortest-path algorithm to compute the shortest path from x to a

What is money laundering and how is money laundered, Question: a) (i)...

Question: a) (i) Describe the entire process of credit card processing, identifying the different steps and parties involved. (ii) What are the roles of the acquiring ban

Resolution of domain name system, Q. Resolution of domain name system? ...

Q. Resolution of domain name system? - Mapping a name to an address or else an address to a name - Resolver is a DNS client used by an address to provide mapping - In re

Acknowledgment number - transport layer, Acknowledgment number This 32...

Acknowledgment number This 32 bit  field  defines  the byte  number that the  from the  segment is expecting to  receive the segment is expecting to receive from the other par

How to configure a wireless mac filter - ccna, Configure a Wireless MAC Fil...

Configure a Wireless MAC Filter Step: Add a Mac filter. Navigate back to the web utility page of the router (http://172.17.30.1). Navigate to the Wireless section a

Protocol layering - computer network, Protocol Layering To design  str...

Protocol Layering To design  structural  network protocols the designers organize protocol and use the network  hard ware and software to implement  the protocol  in layers. E

Describe about data communications, Q. Describe about Data Communications? ...

Q. Describe about Data Communications? - Data - Information presented in whatsoever form is agreed upon by the parties creating and using the data - Data Communications - ex

Private network, Single company or organization owns this. They are usually...

Single company or organization owns this. They are usually LAN technologies. There can be multiple LANs in a campus or building linked together. They are sometimes known Intranet.

Network design, Get the network design for a company

Get the network design for a company

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