With regard to Ethernet media access methods, which of the following are true?(Choose all that apply.)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.
With regard to Ethernet media access methods, which of the following are true?
(Choose all that apply.)
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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多选题Which two statements are true regarding an Ethernet collision domain?（）AIf a switch is used, the collision domain is limited to each device and the switch.BIf a hub is used, the collision domain is limited to each device and the hub.CIf a hub is used, the collision domain includes all devices connected to the hub.DIf a switch is used, the collision domain includes all devices connected to the switch.
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多选题Which two statements are true regarding an Ethernet collision domain?（）AIf a switch is used, the collision domain is limited to each device and the switchBIf a hub is used, the collision domain is limited to each device and the hubCIf a hub is used, the collision domain includes all devices connected to the hubDIf a switch is used, the collision domain includes all devices connected to the switch
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单选题Which statement is true regarding an Ethernet collision domain?（）AIf a router is used, the collision domain includes all devices connected to the routerBIf a hub is used, the colision domain is limited to each device and the hubCIf a switch is used, the collision domain is limited to each device and the switchDIf a bridge is used, the collision domain includes all devices connected to the bridge
多选题Two devices on an Ethernet segment sent frames at the same time causing a collision. Which two statements are true?（）ABoth devices stop transmiting, wait a random period of time, verify the wire is idle, and re-transmitBThe device with the lowest MAC address is permitted to retrannsmit firstCThe device with the lowest MAC address sends a jam signal to notify all other devices of the collisionDBoth devices send a jam signal to notify all other devices of the collision
单选题Which of the following problems has occurred when a menu appears and prompts the user to "copy a dump to external media?（）A The external dump device is full. B The dump device was set to /dev/hd7 before the dump happened. C The boot failed while copying the dump from paging space to a file. D The dump device was not set to a paging device before the dump happened.