CompTIA N10-004 Chapter 1

Session Initiation Protocol - signaling protocol used for setting up and tearing down multimedia sessions such as voice and video over internet. TCP/IP based Application layer protocol. Placed in session layer of OSI. Text based can run on TCP, UDP., SCTP. Typically ports 5060 and/or5061

Real-time Transport Protocol - defines a standardized packet format for delivering audio and video over the internet. Used extensively in communication and entertainment systems that involve streaming media. It is one of the technical foundations for the VOiP industry. Usually used in conjuction with RTP Control Protocol (RTCP). RTP on Even ports, RTCP on odd ports. Usually unprivileged UDP ports (1024 - 65535)

Transport Layer Security is a cryptographic protocol that provides security and data integrity for communications over the network. TLS and SSL encrypt the sebments of network connections at the Transport Layer end-to-end. It is an application layer protocol, designed to prevent eavesdtopping, tampering, and message forgery.

Post Office Protocol 3 - application layer internet standard used by local email clients to retrieve email from remote servers over TCP/IP. Supports end users with intermittent connections. Usually connects, retrieves all and stores on local computer, deletes from server, then disconnects. Uses port 110. Can encrypt POP3 traffic using TSL or SSL.

Internet Message Access Protocol (IMAP or IMAP4) is a prevalent Internet standard protocol for e-mail retrieval. It is an application layer Internet protocol operating on port 143 that allows a local client to access e-mail on a remote server. IMAP supports both connected (online) and disconnected (offline) modes of operation. E-mail clients using IMAP generally leave messages on the server until the user explicitly deletes them. This and other facets of IMAP operation allow multiple clients to access the same mailbox.