Computer Networking
A network administrator wants to upgrade the IOS of a router without removing the image currently installed. What command will display the amount of memory consumed by the current IOS image and indicate whether there is enough room available to hold both the current and new images?

show buffers
show flash
show memory
show version

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Computer Networking
The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?

A physical address that is assigned by the manufacturer
A physical address that is randomly assigned each time the computer is started
A logical address that identifies the workstation
The logical domain address for the workstation
An alias for the computer name

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