Computer Networking
What is route poisoning?

It prevents regular update messages from reinstating a route that has just come up.
It describes when a router sets the metric for a downed link to infinity.
It sends back the protocol received from a router as a poison pill, which stops the regular updates.
It is information received from a router that can't be sent back to the originating router.

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

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Computer Networking
The packets switching concept was first proposed

None of these
in the late 1950s for Defense Ministry of US
in the early 1960s for military communication systems, mainly to handle speech
All of these
in the late 1980s for the Defense Ministry of US.

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