Computer Networking
A WATS arrangement

is always less expensive than flat-rate service
is never less expensive than flat-rate service
None of these
is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
is less expensive than flat-rate service only when the number of calls is small and the duration of each is long

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

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Computer Networking
X.21 is

None of these
network access standard for connecting stations to a circuit-switched network
a very common bit-oriented data link protocol issued by ISO
a method of determining which device has access to the transmission medium at any time
a method access control technique for multiple-access transmission media

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