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Mail Access Protocols
The e mail message are usually sent to an email server that stores received message in the recipient e mail mailbox. The user retrieves message with either a web browser or an e mail client that uses one of a number of mail retrieval protocols.
Some clients and servers preferentially use vendor specific proprietary protocols. But most support the internet protocols, SMTP for sending e mail and POP3 ( post office protocols version 3) and IMP4 ( internet Mail Access protocols , version 4 for retrieving email allowing mterprebability with other servers and clients. SMTP can also be used for retrieving email. It is more suitable for permanent internet connection than say a dialup connection and is not supported by most e mail client software.
CYCLE OF BRIDGES: A bridges network can join several segments. One bridge is useded to connect every segment to the rest of the bridge network. This is given in the figure be
File servers are useful for sharing files through a network. With a file server, the client passes requests for file records over network to file server
Question 1: a. Differentiate between the several types of switching networks together with illustration. b. With the help of a diagram explain the two modes of operation un
Briefly write functionalities of different OSI layers? The OSI Reference Model includes seven layers. Basic functionality of each of them is as follows: 1. Physical Layer:
Hypercube Network The hypercube architecture has played a vital role in the development of parallel processing and is still not much popular and influential. The highly symmetr
Q. Show the Application Layer Responsibilities? - Make possible user access to the network - User interfaces as well as support for services such as E-Mail File
State the example of intranet security Imagine a situation when a company develops a major new product secretly using its Intranet. Hackers break the security and take away all
UDP is connectionless, and does not give error checking. But remember, error checking can happen at other layers too.
Q. What are the basic key functions of data link layer? Ans: Data link layer transfers data in a structured and reliable manner so that the service given by the physical layer
5. Suppose that frames are 1250 bytes long including 25 bytes of overhead. Also assume that ACK frame are 25 bytes long. Calculate the efficiency of Stop-and-Wait ARQ in a system t
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