Computer Networking
Avalanche photodiode receivers can detect hits of transmitted data by receiving

100 photons
300 photons
None of these
400 photons
200 photons

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Computer Networking
Error detecting code is

an error-detecting code based on a summation operation performed on the bits to be checked
a check bit appended to an array of binary digits to make the sum of all the binary digits.
the ratio of the data units in error to the total number of data units
None of these
a code in which each expression conforms to specify rules of construction, so that if certain errors occur in an expression, the resulting expression will not conform to the rules of construction and

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Computer Networking
Why does the data communication industry use the layered OSI reference model?1. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.2. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.3. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.4. It encourages industry standardization by defining what functions occur at each layer of the model.

2 and 3
3 only
1 only
1 and 4

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Computer Networking
Which is true regarding EIGRP successor routes?1. A successor route is used by EIGRP to forward traffic to a destination.2. Successor routes are saved in the topology table to be used if the primary route fails.3. Successor routes are flagged as "active" in the routing table.4. A successor route may be backed up by a feasible successor route.5. Successor routes are stored in the neighbor table following the discovery process.

2 and 3
3, 4 and 5
1 and 3
1 and 4

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