ch4-2. A group of N stations share a 56-kbps pure ALOHA channel. Each station outputs a 1000-bit frame on an average of once every 100 sec, even if the previous one has not yet been sent (e.g., the stations can buffer outgoing frames). What is the maximum value of N?
Q. What is the baud rate of the standard 10-Mbps Ethernet?
A. Mbaud
Q. Consider building a CSMA/CD network running at 10 Mbps over a 1-km cable with no repeaters. The signal speed in the cable is 200,000 km/sec. What is the minimum frame size?
A. bits
The reason for binary exponential backoff in the classical Ethernet is that________
- this algorithm is simple
- this algorithm is fast
- this algorithm is adaptive to network load
- this algorithm is scalable to network size
maybe c
When binary exponential backoff is used, a random number between 0 and ________ is chosen and that number of slots is skipped
- 511
- 1023
- 2047
- 4095
Box 1: Select the best answer
maybe 1023
网络接口卡主要在________层工作
- 物理和数据链接
- 数据链接和网络
- 物理和网络
- 数据链接和传输
方框1：选择最佳答案
A
桥接器提供的重要功能之一不是？
- 减少碰撞域
- 增加数据速率
- 增加域的长度
- 减少广播域
方框1：选择最佳答案
B
There is a 10 Mbps Ethernet switch with 10 ports each of which is connected to a single computer. Then every computer’s data rate is ________Mbps.
- 1
- 2
- 10
- 100
Box 1: Select the best answer
10
________ work at the physical layer while ________ work at the data link layer.
- Hubs, routers
- Hubs, switches
- Bridges, routers
- Repeaters, hubs
Box 1: Select the best answer
________在物理层工作，而________在数据链路层工作。
- 集线器，路由器
- 集线器，交换机
- 桥接器，路由器
- 中继器，集线器
方框1：选择最佳答案
A
What kind of media used by 1000Base-F network?
- Coaxial Cable
- Twisted Pairs
- Fiber Optics
- Power Lines
Box 1: Select the best answer
C
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