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

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Computer Networking
If routers in a single area are configured with the same priority value, what value does a router use for the OSPF Router ID in the absence of a loopback interface?

The lowest IP address of any physical interface
The lowest IP address of any logical interface
The highest IP address of any physical interface
The highest IP address of any logical interface

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