Computer Networking
Which of the following frequency ranges is used for AM radio transmission?

High Frequency : 3 MHz to 30 MHz
Medium Frequency : 300 kHz to 3 MHz
Very Low Frequency : 3 kHz to 30 kHz
None of these
Very High Frequency : 30 MHz to 300 MHz

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Computer Networking
Which of the following is true when describing a global unicast address?

These are your typical publicly routable addresses, just like a regular publicly routable address in IPv4.
These are like private addresses in IPv4 in that they are not meant to be routed.
Packets addressed to a unicast address are delivered to a single interface.
These addresses are meant for nonrouting purposes, but they are almost globally unique so it is unlikely they will have an address overlap.

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Computer Networking
The application layer of a network

defines the user's port into the network
All of these
None of these
consists of software being run on the computer connected to the network
establishes, maintains, and terminates virtual circuits

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Computer Networking
The Token-Ring architecture was developed for a more efficient way to determine who should be transmitting at any one time. With Ethernet, collisions may take place, causing the transmitting computers to have to retransmit their data. The use of token guarantees that only one computer can transmit at a time. What happens as the network increases in size? Choose the best answer

The network becomes more efficient
The speed of the Token-Ring network must be 16Mbps if the number of nodes is greater then 500
After the number of nodes exceeds 550, the Multistation Access Unit must be replaced by the more powerful Hyperstation Unified Bandwidth device
The network becomes less efficient
An additional token is added for every 1,000 nodes

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