[单项选择]In the Ethernet LAN, an algorithm was chosen to dynamically adapt to the number of stations trying to send. It is called
A. backward learning
B. binary exponential backoff
C. spanning tree
D. CRC

[单项选择]

In the Ethernet LAN, an algorithm was chosen to dynarnically adapt to the number of stations trying to send. It is called（）

A. backward learning
B. binary exponential backoff
C. spanning tree
D. CRC

[单项选择] There are three routers on a Gigabit Ethernet LAN: Router A, Router B, and Router C. Router A is the Designated Intermediate System (DIS) at Level 1 for that LAN. Router A's DIS priority is 64. The LAN is a Level 1-only link. Router D has just been powered up on that same LAN and its DIS priority is 80. Which statement is true?（）
A. Router A remains the DIS and generates a new pseudonode LSP for that LAN
B. Router A remains the DIS and NO new pseudonode LSP is generated for that LAN
C. Router D becomes the new DIS, generates a new pseudonode LSP for that LAN, and purges the old pseudonode LSP generated by Router A
D. Router D becomes the new DIS, does NOT generate a new pseudonode LSP for that LAN, and does NOT purge the old pseudonode LSP generated by Router A

[单项选择]On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously,resulting in a collision. Following this collision, what will the hosts do?（）
A. The destination host sends a request to the source for retransmission.
B. The jam signal indicates that the collision has been cleared.
C. The hosts will attempt to resume transmission after a time delay has expired.
D. An electrical pulse indicates that the collision has cleared.
E. The router on the segment will signal that the collision has cleared.
F. The hosts will do nothing, as the higher layers are responsible for data error correction and re-transmission.

[单项选择]Gigabit Ethernet 的传输速率比传统的 10Mbps Ethernet 快 100 倍，但是它仍然保留着和传统的 Ethernet 的相同的______。
A. 物理层协议
B. 帧格式
C. 网卡
D. 集线器

[单项选择]Gigabit Ethernet的传输速率比Fast Ethernet快( )倍。
A. 10
B. 5
C. 8
D. 100

[单项选择]

10Gbps Ethernet与10Mbps、100Mbps和1Gbps Ethernet采用了完全相同的（）。
Ⅰ.帧格式
Ⅱ.逻辑链路控制子层协议
Ⅲ.物理层标准
Ⅳ.数据编码方法

A. Ⅰ和Ⅱ
B. Ⅰ、Ⅱ和Ⅲ
C. Ⅱ和Ⅳ
D. Ⅱ、Ⅲ和Ⅳ

[单项选择]Gigabit Ethernet 的传输速率比传统的10Mbps Ethernet 快100倍，但是它们然保留着和传统的Ethrnet的相同的( )。
A. 物理层协议
B. 桢格式
C. 网卡
D. 集线器

[单项选择]Gigabit Ethernet的传输速率比传统的10Mbps Ethernet快100倍，但是它们然保留着和传统的Ethernet的相同的
A. 物理层协议
B. 帧格式
C. 网卡
D. 集线器

[单项选择]与快速以太网 Fast Ethernet相同之处是：千兆位以太Gigabit Ethernet同样保留着传统的10 Mbps Ethernet的基本特征，而且把每个比特的发送时间降低为
A. 100ns
B. 10 ns
C. 0.1ns
D. 1ns

[单项选择]千兆位以太Gigabit Ethernet与快速以太网Fast Ethernet相同之处是：同样保留着传统的10 Mbps Ethernet的基本特征，而且把每个比特的发送时间降低为
A. 100ns
B. 10ns
C. 0.1ns
D. 1ns

[单项选择]下列属于共享介质局域网的是( )。 Ⅰ．Ethernet Ⅱ．SwiShed Ethernet Ⅲ．FDDI Ⅳ．ATM LAN Ⅴ．Token Bus Ⅵ．Token Ring
A. Ⅰ、Ⅱ、Ⅲ、Ⅵ
B. Ⅰ、Ⅱ、Ⅳ、Ⅴ
C. Ⅱ、Ⅲ、Ⅳ、Ⅴ
D. Ⅰ、Ⅲ、Ⅴ、Ⅵ

[单项选择]Gigabit Ethernet的传输速率比传统的10Mbps Ethernet快100倍，但是它仍然保留着和传统的 Ethernet的相同的______。
A. 物理层协议
B. 帧格式
C. 网卡
D. 集线器