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

None of these
All of these
the interface between the X.25 network and packet mode device
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
You have created a named access list called Blocksales. Which of the following is a valid command for applying this to packets trying to enter interface s0 of your router?

(config-if)# ip access-group 110 in
(config)# ip access-group 110 in
(config-if)# blocksales ip access-list in
(config-if)# ip access-group Blocksales in

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Computer Networking
Which of the following statements is correct for the use of packet switching?

the employment of additional intelligence within the network enabled more sophisticated error control and link control procedures to be applied
by employing wide bandwidth circuits for the trunk networks substantial economies through extensive sharing of capacity could be achieved.
None of these
the subdivision of information into individually addressed packets in conjunction with alternative routing arrangement enabled the transmission path to be altered in the event of congestion or individ
All of these

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