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

Distribution of dns - application layer , Distribution of DNS 1.By cen...

Distribution of DNS 1.By centralized data base The information contained in the domain  name space must be stored. A simple design  or DNS would have one DNS server that co

Concept of internetwork and intranetwork routing protocols, Describe the co...

Describe the concept of internetwork and intranetwork routing protocols?

Explain types of redundancy checks, Q. Explain Types of Redundancy Checks? ...

Q. Explain Types of Redundancy Checks? Parity Check Simple Parity Check Two Dimensional Parity Check / Longitudinal Redundancy Check (LRC) CRC (Cyclic Redund

Layered concept of computer networks, Q1.  What  advantages  do  you  see  ...

Q1.  What  advantages  do  you  see  in  having  a  layered  concept  of  computer  networks?  Which layers or OSI structure deals with identification of a host? Explain the proces

Computes their distance vector for network, Consider the following network ...

Consider the following network example. Suppose that the distance vector (DV) routing algorithm is used to compute the distance between nodes. (a) Show the procedure of nod

What are the features of star and ring topology, What are the features of s...

What are the features of star and ring topology The three networks have following features: star: best case is = 2, average case is = 2, worst case is = 2 ring: best case

What is a jam signal, What is a jam signal A jam signal is broadcasts ...

What is a jam signal A jam signal is broadcasts to network by the transmitting stations that detected the collision to ensure that all stations know of the collision. Every st

Show the application layer responsibilities, Q. Show the Application Layer ...

Q. Show the Application Layer Responsibilities? - Make possible user access to the network - User interfaces as well as support for services such as E-Mail File

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