TCP/IP is the most common LAN protocol.
Your question is quiet confusing but if you are asking for the protocol for a computer inside the LAN to be able to communicate through the internet then it is the TCP/IP.
The older protocol for this purpose was BOOTP, but modern addressing LAN schemes today will use DHCP.
wpa2
ATM protocol is a WAN technology
A spanning tree protocol, or STP, is characteristic to a LAN. It provides a loop-free topology for networks within the system.
a collision
ethernet
HTTP
***EIGRP traffic will use the path Router1, Router3, Router4, Router5 because it has the best metric.
RIP listener waits for route updates sent by routers that use the routing information protocol in a corporate LAN.
Local Area Network A data network that does not include routing to remote locations. The most common protocol for wired LAN is currently Ethernet. The most common cabling for wired LAN is currently UTP (unshielded twisted pair) copper.