Computer Networking
A distributed data processing configuration in which all activities must pass through a centrally located computer is called a:

data control network
spider network
None of these
ring network
hierarchical network

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Computer Networking
A T-switch is used to

transmit characters one at a time
echo every character that is received
rearrange the connections between computing equipment
None of these
control how messages are passed between computers

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Computer Networking
You get a call from a network administrator who tells you that he typed the following into his router:Router (config) #router ospf 1Router (config-router) #network 10.0.0.0 255.0.0.0 area 0He tells you he still can't see any routes in the routing table. What configuration error did the administrator make?

The AS configuration is wrong.
The OSPF Process ID is incorrect.
The OSPF area is wrong.
The wildcard mask is incorrect.

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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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