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

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Computer Networking
Modulation is the process of

converting analog signals to digital signals
performing data encryption.
converting digital signals to analog signals
Multiplexing various signals into high speed line signals

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