Imap and pop functions, Computer Network Security

 

How does the POP functions? What are the advantages/benefits of IMAP over POP?

POP stands for Post Office Protocol, version 3 (POP3) is one of the easiest message access protocol available which needs installation of POP3 software on the client machine as well as server machine both.

The below drawn figure shows the architectural view of thecommunication which takes place between a POP3 client and a POP3 mail server.

 

766_POP_functions.png

Figure PUP3 Communication

In POP3 communication, the client is required to bring out the e-mails from the mailbox which resides on the mail server. At first, client sends username and password for authorization. The  mail  server  checks  the  username  and  password  and  then  provides  privileges  and permissions o that particular client. The client requests a list of e-mails to which the mail server gives the e- mail information catalogue (including e-mail numbers, sizes and many more). Finally, client retrieves e-mail from mailbox based on the requirement.

POP3 comprises of two message access modes such as keep the mode and delete mode. In the keep mode context, the mail remains in the mailbox once it is retrieved for future reviewing. This mode is generally used when user is remotely accessing mails.
In delete the mode context, the mail gets deleted from mailbox as soon as it is retrieved. This mode is generally used when user is accessing mails from its personal computer( pc), where it can store the mails for future use.
The Internet Mail Access Protocol version 4 (IMAP4) gives certain advantages to the user over the POP3 which are stated below,
(i) E-mail header can be seen before retrieval.
(ii) E-mail contents can be identified with the given string of characters before the retrieval. 
(iii) E-mail can be partially retrieved when the bandwidth is quite low and the multimedia contained in e-mail requires high bandwidth.
(iv) A user can have the accessing privileges such as deleting, creating and renaming the mailboxes on mail server.
(v) A collection of the mailboxes can be created in the folder for storing the e-mails.

Posted Date: 7/20/2012 5:46:08 AM | Location : United States







Related Discussions:- Imap and pop functions, Assignment Help, Ask Question on Imap and pop functions, Get Answer, Expert's Help, Imap and pop functions Discussions

Write discussion on Imap and pop functions
Your posts are moderated
Related Questions
This assignment aims to enhance students' understanding of the network protocol hierarchy and flow control and error control techniques by implementing a sliding window protocol in

(a) Describe how CSMA/CD operates and explain how Ethernet deals with collisions. (b) Describe how the subsequent protocols work: i. ARP ii. DHCP iii. DNS iv. SMTP (c) The

Asymmetric Encryption Asymmetric encryption method makes use of two different but related keys and either key can be used to encrypt or decrypt the message. This method is freque

(a) Define what you understand by the following terms in Network Flows: i) UnDirected Path ii) Directed Path iii) Directed Cycle. iv) Tree In each of the above, expla

(a) Briefly explain the following security goals provided by cryptography: confidentiality, authentication, integrity and non-repudiation. (b) State Kerckhoff's Princip

Question: A regional police force has the following corporate objectives: ? to reduce crime and disorder; ? to promote community safety; ? to contribute to delivering just

Question: a. State briefly three reasons why computer networks are used? b. Differentiate between simplex, half-duplex and full-duplex mode of transmission. c. State any

Network Virtual Terminal It is a set of principles describing a very simple virtual terminal interaction. The NVT is needed in the start of a Telnet session. Communication wit

Question : (a) What do you meant by the term "Bastion Host"? What is its use? (b) "Hostile" Java applets will do undesirable actions. Mention two problems caused by Hosti

Question: (a) How can you prevent someone from accessing your computer when you leave your office for some time? (b) What is the difference between a classic login and a w