Computer Networking
Interconnected networks need communication processors such as switches, routers, hubs, and gateways. Select the best fit for answer:

Internetwork processor
Open Systems
TCP/IP
Protocol

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

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

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Computer Networking
The network layer, in reference to the OSI model, provide

the interface between the X.25 network and packet mode device
All 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
None of these

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