Computer Networking
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

3, 3, 2, none
3, 2, 1, none
3, 3, 1, 7
3, 2, 1, 7
All of these

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Computer Networking
You are working on a router that has established privilege levels that restrict access to certain functions. You discover that you are not able to execute the command show running-configuration. How can you view and confirm the access lists that have been applied to the Ethernet 0 interface on your router?

show interface Ethernet 0
show ip access-lists
show access-lists
show ip interface Ethernet 0

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Computer Networking
X.21 is

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

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