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# TCP/IP Protocols * * * TCP/IP is a large collection of different communication protocols. * * * ## Protocol Family TCP/IP is a large collection of different communication protocols based on TCP and IP, the two original protocols. * * * ## TCP - Transmission Control Protocol TCP is used for data transmission control from applications to the network. TCP is responsible for splitting data into IP packets before sending them, and then reassembling them when they arrive. * * * ## IP - Internet Protocol IP is responsible for communication between computers. IP is responsible for sending and receiving packets on the Internet. * * * ## HTTP - Hyper Text Transfer Protocol HTTP is responsible for communication between web servers and web browsers. HTTP is used to send requests from web clients (browsers) to web servers, and to return content (web pages) from web servers to web clients. * * * ## HTTPS - HTTP Secure HTTPS is responsible for secure communication between web servers and web browsers. As a representative application, HTTPS is used to handle credit card transactions and other sensitive data. * * * ## SSL - Secure Sockets Layer The SSL protocol is used to encrypt data for secure data transmission. * * * ## SMTP - Simple Mail Transfer Protocol SMTP is used for email transmission. * * * ## MIME - Multi-purpose Internet Mail Extensions The MIME protocol enables SMTP to transmit multimedia files over TCP/IP networks, including audio, video, and binary data. * * * ## IMAP - Internet Message Access Protocol IMAP is used to store and retrieve emails. * * * ## POP - Post Office Protocol POP is used to download emails from email servers to personal computers. * * * ## FTP - File Transfer Protocol FTP is responsible for file transfer between computers. * * * ## NTP - Network Time Protocol NTP is used to synchronize time (clocks) between computers. * * * ## DHCP - Dynamic Host Configuration Protocol DHCP is used to assign dynamic IP addresses to computers on a network. * * * ## SNMP - Simple Network Management Protocol SNMP is used for management of computer networks. * * * ## LDAP - Lightweight Directory Access Protocol LDAP is used to gather information about users and email addresses from the Internet. * * * ## ICMP - Internet Control Message Protocol ICMP is responsible for error handling in networks. * * * ## ARP - Address Resolution Protocol ARP is used to find the hardware address of a computer's network card based on its IP address. * * * ## RARP - Reverse Address Resolution Protocol RARP is used to find the IP address of a computer's network card based on its hardware address. * * * ## BOOTP - Boot Protocol BOOTP is used to start computers from the network. * * * ## PPTP - Point to Point Tunneling Protocol PPTP is used for connections (tunneling) between private networks.