Computer Networking
Which of the following summation operation is performed on the bits to check an error-detecting code?

None of these
Attenuation
Codec
Checksum
Coder-decoder

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Computer Networking
A network administrator views the output from the show ip route command. A network that is advertised by both RIP and IGRP appears in the routing table flagged as an IGRP route. Why is the RIP route to this network not used in the routing table?

IGRP has a lower administrative distance.
RIP has a higher metric value for that route.
The IGRP route has fewer hops.
IGRP has a faster update timer.

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Computer Networking
The packets switching concept was first proposed

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

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Computer Networking
How does a host on an Ethernet LAN know when to transmit after a collision has occurred?1. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.2. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.3. You can improve the CSMA/CD network by adding more hubs.4. After a collision, the station that detected the collision has first priority to resend the lost data.5. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.

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

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