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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.
Physical Media In order to define what is meant by a physical medium let us reflect on the brief life of a bit. Consider a bit travelling from one end system through a serie
Network Service Model The network service model defines the characteristics of end to end transport of data between one edge of the network to the other that is betwe
define protocol
An ATM network is created from interconnected ATM switches. The attachment ports or points can be connected to computers or other ATM switches. As cells reach at an ATM switch, the
Which protocol will send a message to routers if a network outage or congestion happen Ans) Internet Control Message Protocol - ICMP will send a message to routers if a network
Intranets are fundamentally "small" Internets. They employ the same network facilities which the Internet does, however access is limited to a restricted sphere. For example, a com
if the signal input to an amplifier is 0 dBm what is the power output in mW if the gain of the amplifier is 20 dB ?
Virtual Private Network ( VPNs) When we use the internet or the risks to the security of our data arise. The solve the security problem a virtual private network used for
Physical layers defines with synchronizing the 1s and 0s on the wire.
You are the Senior Project Manager in a software company and have, as part of your team, a student on a three month internship. The student has proudly told you that they have stu
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