Gateway, Repeater, Hub, NIC, Cables

Layer 1

Physical

Gateway, Switch, Bridge, Wireless Access Point (WAP), NIC

802.1Q, 802.3 (Ethernet), 802.11a/b/g (wireless), ATM, Frame Relay, L2TP, PPP,PPTP, SLIP, and Token ring

Layer 2

Data Link

Gateway, Router, Brouter

ARP, ICMP, IP, ISec, IPX, NetBIOS/NetBEUI, ISPF, and RIP

Layer 3

Network

Gateway

Apple Talk Protocol (ATP), Name Binding Protocol (NBP), NetBEUI, Point to Point Tunneling Protocaol (PPTP), Sequenced Packet Exchange (SPX), TCP, and UDP

Layer 4

Transport

Gateway

NetBIOS, SAP, RPC, AQL, and X-Windows

Layer 5

Session

Gateway

ASCII, DIC, EBC, GIF, JPEG, PICT, and TIFF

Layer 6

Presentation

Gateway and Proxy server

DNS, FINGER, FTP, HTTP, MIME, NFS,NNTP, POP3, SMB, SMTP, SNMP, Telnet, and TFTP

Layer 7

Application