IMAP (Internet Message Access Protocol)

Legacy Interactive Mail Access Protocol (IMAP) access to Exchange is also available, which can enable an Exchange server to be accessed via IMAP applications, such as some UNIX mail clients. As with the POP3 protocol, IMAP support must be explicitly turned on.

An IP datagram is a basic unit of information used by the IP layer to exchange data between two hosts. A IP datagram consists of an IP header and data.

IMAP: Internet Mail Access Protocol..

It is used for incoming mail in client/remote users of a mail server. A user do not download e- mail in her pc from server.just to read or access from server. email saves in a server...

RFC 791 discusses about the IP protocol version 4.

IP is used for

1. Transmitting data from higher-level protocols like TCP, UDP in IP datagrams, from one host to another host in the network.

2. Identifying individual hosts in a network using an IP address.

3. Routing datagrams through gateways and

4. Fragmenting and reassembling datagrams based on the MTU of the underlying network.

Yes. All IP networks must be able to handle datagrams of at least 576 bytes in length.

IP is a connection-less protocol because it does not maintain state information about the connection to a destination host. Each datagram is handled independent of other datagrams and also each datagram may reach the destination through different network routes.

IP version 4 (IPv4) is discussed in this document.

The data from higher-level protocols like TCP, UDP is encapsulated in an IP datagram and transmitted to the destination host. IP will not modify the higher-level data.