There are some early visionaries:
- J.C.R. Licklider
- Doug Engelbart
- Len Kleinrock
James R.Killian: advocated the creation of the Defense Advanced Research Agency (DARPA)
->Advanced Project Research Agency (APRA, 1958)
J.C.R. Licklider: establish a time-sharing network, lead to ARPANet
There are several different networks
(1) Messenger Networks:
passing messages from runner to runner
(2) Store & Forward Networks
(3) Circuit Switching:
good for continuous information streams, e.g. the phone network
(4)Packet Switching
No comments:
Post a Comment