Chapter_17.66105429 - Chapter 17 REVIEWING THE BASICS 1....

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Chapter 17 REVIEWING THE BASICS 1. Name three types of Ethernet. What transmission speed does each support? 10-Mbps Ethernet (10 Mbps), Fast Ethernet (100 Mbps), and Gigabit Ethernet (1000 Mbps) 2. What is the maximum length of a cable on a 100BaseT network? 100 meters (328 feet) 3. What does the 100 in the name 100BaseT indicate? The transmission speed (100 Mbps) 4. What is broadcasting? Name a network connection device that uses it and one that does not. Broadcasting occurs when a device sends packets to every device to which it is connected, regardless of the packet’s destination. Hubs use broadcasting, and switches do not. 5. What IEEE standards describe Ethernet? What IEEE standards describe wireless LAN? Ethernet: 802.3 Wireless LAN: 802.11, 802.11b, 802.11a, 802.11g, 802.11d 6. What are three ways a wireless network can be secured? Filter MAC addresses, use WEP encryption, and use a VPN. 7. What connecting device do you use for a small LAN? Two or more connected networks? For a small network, a switch is best. To connect two or more networks, a router is required. 8. Describe the structure of an IP address. How is it different from a MAC address? An IP address is a series of four numbers, each no larger than 255, separated by periods. A MAC address is expressed as six pairs of hex numbers separated by dashes. A MAC address cannot change, but an IP address can change on a computer; a MAC address is like a local address; and an IP address is like a long-distance address. 9. How many potential IP addresses are there? 4.3 billion
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10. How many networks and addresses are available for Class A IP addresses? Class B? Class C? Class A: 127 networks; 16 million addresses Class B: 16,000 networks; 65,000 addresses Class C: 2 million networks; 254 addresses 11. Why are Class D and E addresses not available to individuals and companies? Class D addresses are used for multicasting, and Class E addresses are reserved for research.
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This note was uploaded on 08/29/2011 for the course COMP 129 taught by Professor Na during the Spring '11 term at DeVry Irving.

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Chapter_17.66105429 - Chapter 17 REVIEWING THE BASICS 1....

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