In this chapter, we examined the basic characteristics of Ethernet, which is the underlying network system used to support most TCP/IP systems. Ethernet is very flexible, supporting multiple speeds, bandwidths, and transmission media, and is mostly reliable. Ethernet can detect and remedy problems occurring because of multiple simultaneous transmissions on the same channel.
1. |
What is the bandwidth for 10Base-2?
|
|
2. |
What is the bandwidth for 10Base-5?
|
|
3. |
What is the bandwidth for 10Base-T?
|
|
4. |
What is the bandwidth for 100Base-T?
|
|
5. |
What is the role of physical media segments?
|
|
6. |
What is the role of Media Access Control (MAC) rules?
|
|
7. |
What is the role of a frame?
|
|
8. |
What is the generic title of each host connected to Ethernet?
|
|
9. |
In what form does transmission across Ethernet occur?
|
|
10. |
What is the mechanism for preventing packet collision?
|
|
11. |
If a CD event occurs, how can two stations prevent retransmitting at the same time?
|
|
12. |
When more stations are added to a single LAN, what is the likely impact on the number of collisions?
|
|
13. |
How many times will the delivery of a packet be attempted before a transmission failure occurs?
|
|
14. |
What is the range of the data field in an Ethernet frame?
|
|
15. |
Which of the following is a valid MAC address?
|
|
Answers
1. |
A. The bandwidth for 10Base-2 is 2 Mbps. |
2. |
B. The bandwidth for 10Base-5 is 5 Mbps. |
3. |
C. The bandwidth for 10Base-T is 10 Mbps. |
4. |
D. The bandwidth for 100Base-T is 100 Mbps. |
5. |
A. The role of physical media segments is to interconnect systems. |
6. |
B. The role of Media Access Control (MAC) rules is to implement access to Ethernet channels. |
7. |
C. The role of a frame is to organize data to be transmitted in a standard way. |
8. |
D. The generic title of each host connected to Ethernet is station. |
9. |
C. Transmission across Ethernet occurs in bitwise form. |
10. |
C. The mechanism for preventing packet collision is Carrier Sense Multiple Access with Collision Detection (CSMA/CD). |
11. |
A. Two stations can prevent retransmitting at the same time by randomizing the delay between retransmission for each network interface. |
12. |
A. When more stations are added to a single LAN, the number of collisions occurring will increase. |
13. |
D. The delivery of a packet will be attempted 16 times before a transmission failure occurs. |
14. |
B. The range of the data field in an Ethernet frame is 46–1500 bytes. |
15. |
A. Only 11:22:33:44:55:AA is a valid MAC address. |