I can logon to a Window 2000 Server (domain controller) as administrator. But I allowed (via group) policies some other non-administrator users to logon to the server. When they logon, the system automatically after logging on goes into logoff mode and promts again for username and password...
The speed of light is a constant in vacuum. In materials the speed is a function of index of refraction. v (actual velocity) = c (speed of light in vacuum) / n (index of refraction).
For telecom fiber n is between 1.5 and 1.6. Hence in fiber light only travels at about 2/3 of 8 x 10^8 m/s.
The...
