Computer Networking
MAC is

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

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Computer Networking
You connect a host to a switch port, but the new host cannot log into the server that is plugged into the same switch. What could the problem be?

The VTP configuration on the switch is not updated for the new host.
The router is not configured for the new host.
The switch port the host is connected to is not configured to the correct VLAN membership.
The host has an invalid MAC address.

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Computer Networking
When a new trunk link is configured on an IOS-based switch, which VLANs are allowed over the link?

By default, all VLANs are allowed on the trunk.
Only configured VLAN's are allowed on the link.
No VLAN's are allowed, you must configure each VLAN by hand.
Only extended VLAN's are allowed by default.

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