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.
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.
相关考题：
Two stations on the Ezonexam LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network? (Choose all that apply)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.
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.
Regarding PAR (Positive Acknowledgement and Re－transmission), which of the answer choices below are correct?() A. The source device will only retransmit lost packets on the request of the destination device.B. The source device starts a timer when it sends a segment and retransmits if an acknowledgment is not received before the timer expires.C. The destination device acknowledges receipt of a segment by sending a packet with a new sequence number and the ACK bit sent.D. The destination device acknowledges receipt of a segment by sending a packet that indicates the next sequence number it expects.E. If the destination device does not receive a segment, all segments are retransmitted.F. The source device keeps a record of all segments sent and expects and acknowledgment of each.
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.
Which of the following devices can an administrator use to segment their LAN?() A. HubsB. RepeatersC. SwitchesD. BridgesE. RoutersF. Media ConvertersG. All of the above
Which of the following statements are true for routers but not true for Layer 3 Ethernet switches？（Choose all that apply.）（）A、May have Ethernet as well as non-Ethernet interfacesB、Traditionally used as a standalone device for inter-VLAN communicationC、Makes use of TCAMsD、Uses subinterfaces to define trunksE、Can use both Layer 2 and Layer 3 to make forwarding decisionsF、Allows the definition of Switched Virtual Interfaces（SVI）
Which statement about VPLS is true？（）A、All CE devices emulate a bridgeB、All provider devices emulate a bridgeC、Hierarchical VPLS reduces signaling overheadD、Each PE device emulates a bridgeE、Each CE device emulates a bridge
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.
Which two statements are true regarding an Ethernet collision domain?（）A、If a switch is used, the collision domain is limited to each device and the switchB、If a hub is used, the collision domain is limited to each device and the hubC、If a hub is used, the collision domain includes all devices connected to the hubD、If a switch is used, the collision domain includes all devices connected to the switch
Which of the following are true of Ethernet technology?（）A、Hosts use a logical ring topology.B、Hosts use a logical bus topologyC、Hosts must wait for an electronic signal to transfer data.D、Hosts are directly connected to a wiring concentrator called a MSAU.
Which of the following devices can an administrator use to segment their LAN?（）A、HubsB、RepeatersC、SwitchesD、BridgesE、RoutersF、Media ConvertersG、All of the above
A customer is concerned about excessive media jamming in their device. Which of the following is the FIRST thing a technician should check？（）A、Media feed rollersB、Cassette drawersC、Fusing sectionD、Device log data
When creating a Virtual Ethernet adapter， which of the following steps is done FIRST？（）A、Generate a unique MAC address.B、Run cfgmgr to create device special files.C、Create a virtual device with "smitty vlan".D、Add a virtual Ethernet adapter to the partition profile.
Which of the following problems has occurred when a message appears on the system console indicating that a dump must be copied to external media? （）A、 The external dump device is full. B、 The dump device was not mirrored 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.
Which two statements are true regarding an Ethernet collision domain?（）A、If a switch is used, the collision domain is limited to each device and the switch.B、If a hub is used, the collision domain is limited to each device and the hub.C、If a hub is used, the collision domain includes all devices connected to the hub.D、If a switch is used, the collision domain includes all devices connected to the switch.
Two devices on an Ethernet segment sent frames at the same time causing a collision.Which two statements are true?（）A、Both devices stop transmitting, wait a random period of time, verify the wire is idle, and re- transmit.B、The device with the lowest MAC address is permitted to retransmit first.C、The device with the lowest MAC address sends a jam signal to notify all other devices of the collision.D、Both devices send a jam signal to notify all other devices of the collision.
Two devices on an Ethernet segment sent frames at the same time causing a collision. Which two statements are true?（）A、Both devices stop transmiting, wait a random period of time, verify the wire is idle, and re-transmitB、The device with the lowest MAC address is permitted to retrannsmit firstC、The device with the lowest MAC address sends a jam signal to notify all other devices of the collisionD、Both devices send a jam signal to notify all other devices of the collision
Which statement is true regarding an Ethernet collision domain?（）A、If a router is used, the collision domain includes all devices connected to the routerB、If a hub is used, the colision domain is limited to each device and the hubC、If a switch is used, the collision domain is limited to each device and the switchD、If a bridge is used, the collision domain includes all devices connected to the bridge
单选题When creating a Virtual Ethernet adapter， which of the following steps is done FIRST？（）AGenerate a unique MAC address.BRun cfgmgr to create device special files.CCreate a virtual device with smitty vlan.DAdd a virtual Ethernet adapter to the partition profile.
多选题With regard to Ethernet media access methods, which of the following are true?（）AA device waits for an electronic signal before transmitting.BA device listens and waits until the media is not busy before transmitting.CAll devices on an Ethernet segment see data that passes on the network medium.DOnly the sender and the receiver devices see data that passes on the network medium.EEthernet networks allow you to configured devises with higher transmission priority.
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.
多选题Which of the following statements are true for routers but not true for Layer 3 Ethernet switches？（Choose all that apply.）（）AMay have Ethernet as well as non-Ethernet interfacesBTraditionally used as a standalone device for inter-VLAN communicationCMakes use of TCAMsDUses subinterfaces to define trunksECan use both Layer 2 and Layer 3 to make forwarding decisionsFAllows the definition of Switched Virtual Interfaces（SVI）
多选题Your computer has a TV tuner card installed. You install a wireless router and a Microsoft Windows Media Center Extender device. You need to access all the digital media on your computer from a different room in your house. Which two actions should you perform？ （）AIdentify the setup key from the Windows Media Extender device， and input the key on your Microsoft Windows Vista computer.BConfigure the Windows Media Center Extender device and your Microsoft Windows Vista computer to be on the same subnet.CConfigure the Windows Media Center Extender device and your Microsoft Windows Vista computer to be on different subnets.DEnter the password for your Microsoft Windows Vista user account as the setup key for the Windows Media Center Extender device.
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
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.