WHAT IS A PROTOCOL?
A set of formal rules describing how to transmit data, especially across a network. Low level protocols define the electrical and physical standards to be observed, bit- and byte-ordering and the transmission and error detection and correction of the bit stream. High level protocols deal with the data formatting, including the syntax of messages, the terminal to computer dialogue, character sets, sequencing of messages etc.
TCP: Also called Transmission Control Protocol is one of the core principles from the internet protocol suite
IP: Internet Protocol, is the principal communications protocol used for relaying internet packets across an internetwork using the Internet Protocol Suite.
HTTP: Hypertext Transfer Protocol is a networking protocol for distributed, collaborative, hypermedia information systems
SMTP: Simple Mail Transfer Protocol is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks.
POP: the Post Office Protocol (POP) is an application-layer Internet standard protocol used by local e-mail clients to retrieve e-mail from a remote server over a TCP/IP connection
FTP: File Transfer Protocol (FTP) is a standard network protocol used to copy a file from one host to another over a TCP-based network, such as the Internet.
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