Computer Networking
Which of the following describe the process identifier that is used to run OSPF on a router?1. It is locally significant.2. It is globally significant.3. It is needed to identify a unique instance of an OSPF database.4. It is an optional parameter required only if multiple OSPF processes are running on the router.

IS-IS
3 and 5
1 and 3
1, 2 and 4
All of these

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Computer Networking
The physical layer, in reference to the OSI model, defines

the virtual circuit interface to packet-switched service
the interface between the X.25 network and packet mode device
None of these
data link procedures that provide for the exchange of data via frames that can be sent and received
All of these

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