computer networks

7. Hubs: A. Create a logical bus topoliogy B. Vimit the distance of a network to a few meters in length C. Are a difficult method to connect network cables D. Operate at the application layer. E. Create a phrrical bus topologr 8. Which of the following is a potential bottleneck for LAN performance? A. Speed of hard dinks in rhe senver B. Amount of memory in the setreer C. Speed of server's CPy D. Nominal diata rates supportied by the itertwork interface card 6. Als of the answers are poitential botiliruechs for LaN performance: 9. Which of the following statements about linyer-2 nwitehes is (are) False? A. They can be tosed at the access liyee and the dhtributican layer B. They can be used at the core linyer C. They create a logical star topoloty D. They are ithernet compllant E. Fone of the above statements are falhe 10. Which of the foflowing statements abcut 1coplase-t is (are) true? A. It supports 100 mbos data rate and runs on twisted pair cables B. It is inexpetidive C. If can run at enther full-or haif-dupiex D. All of the above E. None of the above 11. Which of the following is Nor defermined by a site survey for WLANs? A. Feasibifity of the detired coverage 8. Potential sources of interference C. The security issues D. fstimated number of access points neteded to provide coverage E. All of the above are determined by a site survey 12. Which of the following statements about Ethernet nominal data rates is (are) true? A. Avallable data rates include 100 Mbgs, 1000 Mbps, 10 Gbps and 406bps 8. 100Mbps and 1000 Mbgs are typically used in access layers C. 1000 Mbps and higher data rates, if justified, are used for bBNs D. a and b E. a, b and c 13. Which of the following is NOT a type of device that can be used for BBNs? A. Layer 2 switches B. Wireless routers C. Layer 3 switches D. Routers E. All of the above can be used