Computer Networking
Which of the following is not a disadvantage of wireless LAN?

Slower data transmission
higher error rate
interference of transmissions from different computers
All of these

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

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

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