Electronic mail - application layer, Computer Networking

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.

Posted Date: 3/7/2013 10:13:40 PM | Location : United States

Related Discussions:- Electronic mail - application layer, Assignment Help, Ask Question on Electronic mail - application layer, Get Answer, Expert's Help, Electronic mail - application layer Discussions

Write discussion on Electronic mail - application layer
Your posts are moderated
Related Questions
Q. Describe the Class C Addresses? The initial three octets are the network number as well as the last octet is the host number 2096896 blocks used for assignment to o

ATM can give customers with virtual circuits that seem traditional leased digital circuits. Such permanent virtual circuits (PVC) fixed as the customer pay the periodic fee for its

What is Sonet Synchronous Optical Network is a fiber optic technology that can transmit high-speed data audio, used for text and video. Single clock handles timing of transm

Define Bandwidth and Latency? Network performance is calculated in Bandwidth (throughput) and Latency (Delay). Bandwidth of a network is given by the number of bits that can be

a)  What does the "CD" mean in the CSMA/CD? How is it implemented in the Ethernet?   b)  Consider an Ethernet hub with 8 ports and an Ethernet switch with 8 ports. In both cases

What are the benefits of wireless devices One benefit is that if everyone uses standard, everyone can talk to anyone. Another benefit is that extensive use of any standard will

how tcp is redefined for wireless network

A.) JPEG and PICT B.) MPEG and MIDI C.) ASCII and EBCDIC For example, the Presentation layer would be liable for changing from EDCDIC to ASCII. Data compression, decompres

Sending a message to a group multicast address is known as multicasting, and its routing algorithm is known as multicast routing.