Network Protocols
Network Protocols 1. IMAP: The Internet Message Access Protocol (commonly known as IMAP) is an Application Layer Internet protocol that allows an e-mail client to access e-mail on a remote mail server . IMAP supports both on-line and off-line modes of operation. E-mail clients using IMAP generally leave messages on the server until the user explicitly deletes them. IMAP offers access to the mail storage. Clients may store local copies of the messages, but these are considered to be a temporary cache. 2. Simple Mail Transfer Protocol ( SMTP ): is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks. SMTP is a connection-oriented , text-based protocol in which a mail sender communicates with a mail receiver by issuing command strings and supplying necessary data over a reliable ordered data stream channel, typically a Transmission Control Protocol (TCP) connection. An SMTP session consists of commands origin