Notion of an Internet protocol How is it possible to send bits across incompatible LANs and wans? Solution: protocol software running on each host and router smooths out differences between different networks Implements an internet protocol(i.e, set of rules that governs how hosts and routers should cooperate when they transfer data from network to network TCP /IP is protocol (family) for global P InternetNotion of an Internet Protocol How is it possible to send bits across incompatible LANs and WANs? Solution: protocol software running on each host and router smooths out differences between different networks Implements an internet protocol (i.e., set of rules) that governs how hosts and routers should cooperate when they transfer data from network to network • TCP/IP is protocol (family) for global IP Internet