Computer Networking
You type the following command into the router and receive the following output:Router#show serial 0/0 ^% Invalid input detected at '^' marker.Why was this error message displayed?

You need to be in privileged mode.
Part of the command is missing.
You cannot have a space between serial and 0/0.
The router does not have a serial0/0 interface.

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

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