what is tcp ip protocol

what is tcp ip protocol?

TCP/IP is most commonly associated with the Unix operating system. While developed separately, they have been historically tied, as mentioned above, since 4.2BSD Unix started bundling TCP/IP protocols with the operating system. Nevertheless, TCP/IP protocols are available for all widely-used operating systems today and native TCP/IP support is provided in OS/2, OS/400, and Windows 9x/NT/2000, as well as most Unix variants.

Figure 2 shows the TCP/IP protocol architecture; this diagram is by no means exhaustive, but shows the major protocol and application components common to most commercial TCP/IP software packages and their relationship.

Application Layer	HTTP   FTP   Telnet   Finger     SSH   DNS POP3/IMAP   SMTP   Gopher   BGP Time/NTP   Whois   TACACS+   SSL	DNS   SNMP   RIP RADIUS   Archie Traceroute   tftp	Ping
Transport Layer	TCP	UDP	ICMP	OSPF
Internet Layer	IP				ARP
Network Interface Layer	Ethernet/802.3   Token Ring (802.5)   SNAP/802.2   X.25   FDDI   ISDN Frame Relay   SMDS   ATM   Wireless (WAP, CDPD, 802.11) Fibre Channel   DDS/DS0/T-carrier/E-carrier   SONET/SDH   DWDM PPP   HDLC   SLIP/CSLIP   xDSL   Cable Modem (DOCSIS)
FIGURE 2. Abbreviated TCP/IP protocol stack.