Computer Networking
The data-link layer, in reference to the OSI model, specifies

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

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Computer Networking
How should a router that is being used in a Frame Relay network be configured to keep split horizon issues from preventing routing updates?

Configure many subinterfaces in the same subnet.
Configure a separate subinterface for each PVC with a unique DLCI and subnet assigned to the subinterface.
Configure a single subinterface to establish multiple PVC connections to multiple remote router interfaces.
Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic.

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