CompTIA A+® Certification All-In-One For Dummies®, 2nd Edition

1.14. Answers

1. C. Category 4 UTP cabling transfers data at 16 Mbps. See "Twisted pair".

2. B. Simplex devices deliver information in only one direction. Review "Understanding Communication Methods".

3. B. Category 3 cabling transfers information at 10 Mbps. Check out "Twisted pair".

4. D. The maximum distance of a Thinnet segment is 185 meters. Peruse "Coaxial".

5. C. The recommended number of computers in a peer-to-peer network is ten or fewer. Take a look at "Peer-to-peer networks".

6. D. CSMA/CD is the access method that is used in all Ethernet environments. Token passing is used in token ring architectures, and CSMA/CA has been used in AppleTalk networks. Peek at "Ethernet".

7. A. Half-duplex devices allow you to send and receive information, but not at the same time. Look over "Understanding Communication Methods".

8. D. Category 5e UTP cabling transfers data at 1 Gbps. Study "Twisted pair".

9. C. A bus topology must have all loose ends terminated to prevent signal bounce. Refer to "Bus".

10. C. With CSMA/CA, your computer avoids a collision with the real data by placing dummy data on the wire first. If the dummy data collides, your computer knows that it isn't safe to send the real information; if it doesn't collide, then the real data is sent. Examine "CSMA/CA".

11. B. Client-server environments are implemented for the purpose of centralized administration and security. It is much easier for an administrator to control resources if he is sitting at one computer and all users connect to that one computer. See "