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

Explain about the integrating intranet, Explain about the Integrating Intra...

Explain about the Integrating Intranet These Intranets are designed to replace the complexity of in-house communications and processing systems that large organisations ofte

Building and running mpi programs, MPI parallel programs are written with c...

MPI parallel programs are written with conventional languages like, C and Fortran  .One or more header files such as "mpi.h" may be needed to give the necessary definitions and dec

Minimum possible response time , Consider the similar conditions as the las...

Consider the similar conditions as the last problem, except for the following: what's the minimum possible response time for the 1 Gbps and a 1 Mbps line?  What does the diffrentia

Enable both arpa and snap encapsulation, You need to enable both arpa and s...

You need to enable both arpa and snap encapsulation on single router interface. How do you do this? Ans)Assign two network numbers, one for every encapsulation type.

Advantages and disadvantage of computer networking , Advantages and Disadva...

Advantages and Disadvantage of Computer Networking Most of the benefits  of networking  can be  divided into  two  generic categories Connectivity and  sharing. Networks

Prompt ''router'', Recognize the mode reflected by the following prompt 'Ro...

Recognize the mode reflected by the following prompt 'Router '? Ans) RXBoot

Internet protocols control protocols ipcp, Internet  Protocols  Control P...

Internet  Protocols  Control Protocols ( IPCP)  The  internet  protocols  control protocols  establishes  configures and terminates the TCP/ IP network  protocols  layer in a PPP

What is the structure of ip multicast address, Question : (a) Several ...

Question : (a) Several techniques are now available for users to connect to the Internet. (i) A modem is commonly used to dial up to the Internet. Why is a modem needed fo

Methods of reliability prediction, I NTRODUCTION Reliability  predicti...

I NTRODUCTION Reliability  prediction  is  an  important  method  for  evaluating  a  system design, right from its conceptual stage through development and manufacture and al

Difference among the communication and transmission, Difference among the c...

Difference among the communication and transmission. Transmission is a physical movement of information and concern issues like bit polarity, synchronisation, clock etc. Com

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