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 are triggers and rules, Triggers are special user defined actions usua...

Triggers are special user defined actions usually in the form of stored procedures, that are automatically requested by the server based on data related events. It can perform diff

Describe the static routing process, Describe the static routing process ...

Describe the static routing process A static routing method does not adapt to changing conditions on the network but uses a fixed method developed ahead of time. With alternat

Itc597, restore the scrambled bits to their original order

restore the scrambled bits to their original order

What is the virtual path, Along any transmission path from a given source t...

Along any transmission path from a given source to a given destination, a group of virtual circuits can be grouped together into what is known as path.

Reliable data transfer over a channel bit error rdt : 20, Reliable  data...

Reliable  data  transfer over a channel bit error  rdt : 20 A more realist model  of the underlying  channel  is one  in which  bits in packet may be  computed. Such  bit erro

Describe essential security services, Problem: (a) Application Layer pr...

Problem: (a) Application Layer protocols can be classified as connection-oriented or connectionless-oriented. i. What do you understand by the term protocol? ii. Give an e

Ethernet interface on the cisco router , As a system administrator, you req...

As a system administrator, you require to set up single Ethernet interface on the Cisco router to permit for both sap and Novell-ether encapsulations. Which set of commands will ac

Dns - protocol attacks, DNS - Protocol Attacks Generally, in the DNS p...

DNS - Protocol Attacks Generally, in the DNS protocol, flaws are based on the implementation issues. The three common issues are generally, associated which can be of one of t

Describe transport and tunnel mode in detail, Can you describe transport an...

Can you describe transport and tunnel mode in detail with datagram packets?

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