Unit Five Technology  
Computer Networks
In general a computer network, as we know today, may be said to have gotten its start with the ARPANET development in the late 1960s and early 1970s. The initial ARPANET design had a definite structure of network architecture and introduced another key concept: protocol layering.
ARPANETAdvanced Research Project Agency Network阿帕网络


Much of our present knowledge about network   is a direct result of the ARPANET project. The ISO, in the late 1970s, formu ...