Computer Networking
Which one of the following is true regarding VLANs?

Two VLANs are configured by default on all Cisco switches.
VLANs only work if you have a complete Cisco switched internetwork. No off-brand switches are allowed.
You should not have more than 10 switches in the same VTP domain.
VTP is used to send VLAN information to switches in a configured VTP domain.

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Computer Networking
The physical layer, in reference to the OSI model, defines

All of these
data link procedures that provide for the exchange of data via frames that can be sent and received
None of these
the interface between the X.25 network and packet mode device
the virtual circuit interface to packet-switched service

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