Computer Networking
Data link layer retransmits the damaged frames in most networks. If the probability of a frame's being damaged is p, what is the mean number of transmissions required to send a frame if acknowledgements are never lost.

P I (K + 1)
KIK (1 + F)
K I (K - P)
None of these
1/ (1 - F)

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Computer Networking
What command is used to stop RIP routing updates from exiting out an interface but still allow the interface to receive RIP route updates?

Router (config-router) # no routing updates
Router (config-if) # passive-interface
Router (config-if) # no routing
Router (config-router) # passive-interface s0

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Computer Networking
You are connecting your access point and it is set to root. What does Extended Service Set ID mean?

That you have more than one access point and they are in the same SSID connected by a distribution system.
That you have multiple access points, but they are placed physically in different buildings.
That you have more than one access point and they are in separate SSIDs connected by a distribution system.
That you have multiple access points, but one is a repeater access point.

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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.

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

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