Computer Networking
When you connect to an online information service, you are asked to provide some kind of identification such as your name, an account number and a password. What is the name given to this brief dialogue between you and the information system?

Safeguard procedure
None of these
Security procedure
Identification procedure
Log-on procedure

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Computer Networking
X.21 is

None of these
a very common bit-oriented data link protocol issued by ISO
a method access control technique for multiple-access transmission media
network access standard for connecting stations to a circuit-switched network
a method of determining which device has access to the transmission medium at any time

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