TCP/IP interface type. Possible TCP/IP interface types include: - 01 = other
- 05 = RFC877 X25
- 06 = Ethernet CSMACD
- 07 = ISO88023 CSMACD
- 09 = ISO88025 Token Ring
- 15 = FDDI
- 23 = PPP
- 24 = Software Loopback
- 28 = SLIP
- 32 = Frame Relay
This is a partial list. For a full list, see RFC 1213.