Computer Networking
When a router is connected to a Frame Relay WAN link using a serial DTE interface, how is the clock rate determined?

By the far end router
By the clock rate command
Supplied by the CSU/DSU
By the Physical layer bit stream timing

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Computer Networking
CSMA (Carrier Sense Multiple Access) is

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

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