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As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the device. For what two reasons can this happen?()A. The data is moving from 10BASE-TX to 100BASE-TX.B. The WAN encapsulation type has c

题目
As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the device. For what two reasons can this happen?()

A. The data is moving from 10BASE-TX to 100BASE-TX.

B. The WAN encapsulation type has changed.

C. The data format has changed from analog to digital.

D. The source and destination hosts are in the same subnet.

E. The source and destination MAC addresses have changed.

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相似问题和答案

第1题：

Which of the following correctly describe steps in the OSI data encapsulation process?()

A. Transport layer divides a data stream into segments & adds reliability & flow control information

B. Data link layer adds physical source & destination address & an FCS to the segment

C. Packets are created when the network layer encapsulate a frame with source & destination host address& protocol related control information

D. Packets are created when the network layers adds layers 3 address & control information to a segment

E. The presentation layer translated bits into bits into voltages for transmission across the physical link


参考答案：A, D

第2题：

What can a network administrator utilize by using PPP Layer 2 encapsulation (Choose three.) ()。

A.VLAN support

B.compression

C.authentication

D.sliding windows

E.multilink support

F.quality of service


参考答案：B, C, E

第3题：

CDP is being used throughout the Ezonexam network. What are two reasons why the Ezonexam network administrator would use CDP? (Choose two)

A. To determine the status of network services on a remote device

B. To obtain the IP Address of a connected device in order to telnet to the device

C. To verify the type of cable interconnecting two devices

D. To verify Layer 2 connectivity between two devices when Layer 3 fails

E. To obtain VLAN information from directly connected swticehs

F. To determine the status of the routing protocols between directly connected routers

G. To support automatic network failover during outages


正确答案：BD
B,D

第4题：

In which two locations in an enterprise network can an IPS sensor be placed？ （）

  • A、 bridging VLANs on two switches
  • B、 bridging two VLANs on one switch
  • C、 between two Layer 2 devices with trunking
  • D、 between two Layer 2 devices without trunking
  • E、 between a Layer 2 device and a Layer 3 device with trunking

正确答案:C,D

第5题：

For what two purposes does the Ethernet protocol use physical addresses？（）

  • A、to uniquely identify devices at Layer 2
  • B、to allow communication with devices on a different network
  • C、to differentiate a Layer 2 frame from a Layer 3 packet
  • D、to establish a priority system to determine which device gets to transmit first
  • E、to allow communication between different devices on the same network
  • F、to allow detection of a remote device when its physical address is unknown

正确答案:A,E

第6题：

What are two reasons a network administrator would use CDP?()

A. to verify the type of cable interconnecting two devices

B. to determine the status of network services on a remote device

C. to obtain VLAN information from directly connected switches

D. to verify Layer 2 connectivity between two devices when Layer 3 fails

E. to obtain the IP address of a connected device in order to telnet to the device

F. to determine the status of the routing protocols between directly connected routers


参考答案：D, E

第7题：

Overlay Transport Virtualization （OTV） overlay interface is a logical multiaccess and multicast- capable interface that must be explicitly defined by the user and where the entire OTV configuration is applied. Which statements are true about OTV overlay interface？（）

  • A、 When an OTV edge device receives a Layer 2 frame destined for a remote data center site， the frame is logically forwarded to the overlay interface.
  • B、 The OTV edge device performs the dynamic OTV encapsulation on the Layer 2 packet and sends it to the join interface toward the routed domain.
  • C、 When the OTV edge device receives a Layer 2 frame destined for a remote data center site， the frame is logically forwarded to the join interface.
  • D、 The OTV edge device performs the dynamic OTV encapsulation on the Layer 2 packet and sends it to the overlay interface toward the routed domain.

正确答案:A,B

第8题：

What are two routing requirements for a device to communicate with another device?()

A. end-to-end communications path

B. hosts on the same Layer 2 broadcast domain

C. hosts on the same Layer 3 broadcast domain

D. routing information on participating Layer 3 devices


参考答案：A, D

第9题：

As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the devicE.For what two reasons can this happen? （）

  • A、The data is moving from 10BASE-TX to 100BASE-TX.
  • B、The WAN encapsulation type has changed.
  • C、The data format has changed from analog to digital.
  • D、The source and destination hosts are in the same subnet.
  • E、The source and destination MAC addresses have changed.

正确答案:B,D

第10题：

As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the device. For what two reasons can this happen?（）

  • A、The data is moving from 10BASE-TX to 100BASE-TX.
  • B、The WAN encapsulation type has changed.
  • C、The data format has changed from analog to digital.
  • D、The source and destination hosts are in the same subnet.
  • E、The source and destination MAC addresses have changed.

正确答案:B,E

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