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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.
Header length This field specifies the length of the TCP header in 32 bit words. This information allows the receiver to know the beginning of the data area becau
What is the use of a default gateway? Default gateways give means for the local networks to connect to the external network. The default gateway for connecting to the external
Work-Sharing Constructs A work-sharing construct distributes the implementation of the associated region between the members of the team that encounters it. A work-sharing cons
Convergence time is slower for Distant Vector routing and is faster for Link State routing.
Application Layer The application layer is where network applications and their application layer protocols reside. The internet application layer includes many protocols
Question : (a) How do you relate the subsequent terms in the context of an information system: data, information and decision-making. (b) Why do you think organisations nowa
ACK Received If an ACK is received by the sender. The SR sender marks that packet as having been received by the receiver.
The disadvantages and advantages of Private and Public networks are shown in the table below:
Explain the term FTP: File Transfer Protocol A very common method of moving files between two Internet sites. FTP is a special way to log in to another Internet site for pur
What is Microwave? Microwaves have been used in data communications. Microwave has a higher frequency than radio waves and thus can handle larger amounts of data.
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