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 is mesh network, What is mesh network? A network in which there ar...

What is mesh network? A network in which there are many network links among computers to provide multiple paths for data to travel.

Identify three characteristics of switches, Switches operate at layer 2. Th...

Switches operate at layer 2. They enhance bandwidth by decreasing the number of devices sharing the media. They isolate collisions. Like a bridge they forward traffic based upon la

Explain mesh interconnection networks, Mesh : This is two dimensional netwo...

Mesh : This is two dimensional networks.  In this all processing elements are organised in a two dimensional grid. The processor in the row i and column j are indicated by PE i .

What are the communication tools, What are the Communication tools ? Voic...

What are the Communication tools ? Voice mail ? Email ? Fax ? Video conferencing applications

Network layer - computer network, Network Layer The  internet  network...

Network Layer The  internet  network  layer is  responsible  for moving  network  layer  packets  known data grams  from one host to another. The internet transport  layer pro

Frame filtering, FRAME FILTERING:  The very important task a bridge op...

FRAME FILTERING:  The very important task a bridge operates is frame filtering. If both the destination and source are on the same segment, it does not repeat the frame to the

Dns id hacking - domain name server, DNS ID hacking The Dns use ID sys...

DNS ID hacking The Dns use ID system in order to keep track of each every request and replies. In order to spoof the DNS’s response, the hacker needs to do ID Hacking. In orde

Determine about the security systems, Determine about the Security Systems ...

Determine about the Security Systems If the company intends to connect to the Internet, then it should pay great attention to the configuration of firewalls. Just as no one wo

Master construct program in parallel construct, master construct #incl...

master construct #include extern float average(float,float,float); void master_construct ( float* x, float* xold, int n, float tol )  { int c, i, toobig; floa

Merge sort circuit, First, split the given series of n numbers into two par...

First, split the given series of n numbers into two parts, each consisting of n/2 numbers. After that, recursively split the series into two parts until each number acts as an inde

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