多項選擇題With regard to Ethernet media access methods, which of the following are true?（）

A. A device waits for an electronic signal before transmitting.
B. A device listens and waits until the media is not busy before transmitting.
C. All devices on an Ethernet segment see data that passes on the network medium.
D. Only the sender and the receiver devices see data that passes on the network medium.
E. Ethernet networks allow you to configured devises with higher transmission priority.


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1.單項選擇題Which of the following are true of Ethernet technology?（）

A. Hosts use a logical ring topology.
B. Hosts use a logical bus topology
C. Hosts must wait for an electronic signal to transfer data.
D. Hosts are directly connected to a wiring concentrator called a MSAU.

2.多項選擇題Two stations on a LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network?（）

A. Each device on the Ethernet segment stops transmitting for a short time.
B. A jam signal informs all devices that a collision occurred.
C. When data transmission resumes, the devices that were involved in the collision have priority to transmit.
D. The devices that are involved in the collision stops transmitting for a short time.
E. The collision invokes a random back-off algorithm.

3.單項選擇題Which of the addresses below is an example of a valid unicast address?（）

A.172.31.128.255./18
B.255.255.255.255
C.192.168.24.59/30
D.224.0.0.5
E.All of the above

4.單項選擇題Which one of the protocols below allows a router to respond to an ARP request destined to a remote host?（）

A. Gateway DP
B. Reverse ARP
C. proxy ARP
D. Inverse ARP
E. indirect ARP

5.單項選擇題Which of the following processes, is used to find the hardware address of a LAN device?（）

A. Inverse-ARP
B. Reverse-ARP
C. Proxy ARP
D. ARP