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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.
Q. What is Transmission Control Protocol? Transmission Control Protocol TCP Services - Stream delivery service Permits the sending process to deliver data as a stream
Monitor Stations Lost tokens - timer is issued each time a frame or token is generated If no frame is received in time period new token is generated by a monitor stat
Q. OSI Network Layer Addressing ISO/IEC and CCITT mutually administer the global network addressing domain. The primary hierarchical decomposition of the address is defined
At the minimum level most networks sends individual packets of data and the network needs each packet to follow an exact format dictated by the hardware, which is known service par
Consider figure. Assume a new flow E is added that takes a path from R1 to R2 to R6. How does the max-min bandwidth allocation change for the 5 flows?
Firewall The NAT router allows receiving of number of a data streams. If it receives a transmission in the form of acknowledgement or data streams or error responses from an ex
Q. Illustrate User Agent Services? User Agent (UA) Services - Provide template for user to compose a message - Reads incoming messages - Allows a user to reply to m
What is Round Trip Time? The duration of time it takes to send a message from one end of a network to the other and back, is known as RTT.
A multiple activity chart records the related sequence of activities of more than one subject, men and / or machine on a common time scale showing the relationship between
Flash It is also permanent storage device. It stores the compressed form of Cisco IOS software image and the NVRAM data. Device structure One flash socket Support 80
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