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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.
Explain the Acknowledged connectionless service This is a cross between the previous two services. It provides that datagrams are to be acknowledged, but no prior logical conne
Q. Presentation layer of osi reference model? - The presentation layer makes sure that the information that the application layer of one system sends out is readable by the app
Q. Show the RS232 Logic Waveform ? RS-232 Interface Three most important wires for the Serial interface Transmit - Pin 2 Receive - Pin 3 Ground - Pin
Define the Class B Addresses? First two octets are the network number as well as the last two octets are the host number 16382 probable blocks for assignment to organi
Advantage of IP sec Tunnelling Mode IP Sec tunnelling mode has the following advantages: a.Security : Ts IP sec tunnelling mode secure somewhat but not the best. In a
Responses Responses are sent from the server to the client. A responses is a three digit code that may be followed by additional textual information.
It is a basic quantitative property of networks. Delay is a calculate how long it takes for a bit of data to cross across the network from one end to the other. It is calculated in
MOSPF MOSPF is multicast extension to OSPF. This protocol is extension of OSPF which is a unicast routing protocol which make MOSPF a combination of unicast and multicast prot
What is difference between ARP and RARP? The address resolution protocol (ARP) is used to associate the 32 bit IP address with the 48 bit physical address, used by a host or a
Default size of frame is 1518 bytes
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