You mention LAN, ethernet, TCP/IP and internet, so it's not 100% clear which layer of the stack you're talking about. There are multiple layers that each have their own set of defined protocols.
Take a look at the wikipedia page for the 7-layer OSI model: http://en.wikipedia.org/wiki/OSI_model
At the physical layer, you may be talking rj45.
At the datalink layer, if you're talking about wired LAN, then you're probably taking about IEEE 802.3 or 802.11 for wireless (there are others).
At the network layer, you could be talking about IP, IPsec, ICMP, IGMP, OSPF, etc.
At the transport layer, TCP and UDP are the common ones.
You didn't mention bits of the stack about that, specifically, but there are, by the OSI model, another three layers.