Computer Networking
What are reasons for creating OSPF in a hierarchical design?1. To decrease routing overhead2. To speed up convergence3. To confine network instability to single areas of the network4. To make configuring OSPF easier

1, 2 and 3
3 and 4
3 only
2, 3 nd 4

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Computer Networking
MAC is

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

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