Internet Protocol Suite

The TCP/IP model consists of four layers (RFC 1122).[1][2] From lowest to highest, these are the Link Layer, the Internet Layer, the Transport Layer, and the Application Layer.

Application Layer: BGP · DHCP · DNS · FTP · HTTP · IMAP · IRC · LDAP · MGCP · N[[NTP]] · NTP · POP · RIP · RPC · RTP · SIP · SMTP · SNMP · SSH · Telnet · TLS/SSL · XMPP ·(more)

Transport Layer: TCP · UDP · DCCP · SCTP · RSVP · ECN ·(more)

Internet Layer: IP (IPv4, IPv6) · ICMP · I C M Pv6 · IGMP · IPsec ·(more)

Link Layer: ARP/In A R P · NDP · OSPF · Tunnels (L2TP) · PPP · Media Access Control (EtherNet, DSL, ISDN, FDDI) · (more)


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