Computer Networking
HDLC (High-level Data Link Control) is

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

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Computer Networking
What is a stub network?

A network with more than one exit point.
A network with more than one exit and entry point.
A network that has only one entry and exit point.
A network with only one entry and no exit point.

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Computer Networking
Synchronous protocols

are more reliable
allow faster transmission than asynchronous protocols do
None of these
are generally used by personal computers
transmit characters one at a time

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Computer Networking
Which of the following is true when describing a multicast address?

Packets addressed to a unicast address are delivered to a single interface.
Packets are delivered to all interfaces identified by the address. This is also called a one-to-many address.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.
Identifies multiple interfaces and is only delivered to one address. This address can also be called one-to-one-of-many.

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