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 version
show memory
show flash
show buffers

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Computer Networking
The difference between a multiplexer and a statistical multiplexer is

Multiplexers use Time Division Multiplexing (TDM) while statistical multiplexers use Frequency Division Multiplexing (FDM)
Multiplexers often waste the output link capacity while statistical multiplexers optimize its use
Statistical multiplexers need buffers while multiplexers do not need buffers
Multiplexer use X.25 protocol, while statistical multiplexers use the Aloha protocol
None of these

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

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Computer Networking
Satellite-Switched Time-Division Multiple Access (SS/TDMA) is

None of these
All of these
the method of determining which device has access to the transmission medium at any time.
a form of TDMA in which circuit switching is used to dynamically change the channel assignments
a medium access control technique for multiple access transmission media

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Computer Networking
The network layer, in reference to the OSI model, provide

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

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