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.
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.
相关考题：
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 deviceB. To obtain the IP Address of a connected device in order to telnet to the deviceC. To verify the type of cable interconnecting two devicesD. To verify Layer 2 connectivity between two devices when Layer 3 failsE. To obtain VLAN information from directly connected swticehsF. To determine the status of the routing protocols between directly connected routersG. To support automatic network failover during outages
What are two routing requirements for a device to communicate with another device?() A. end-to-end communications pathB. hosts on the same Layer 2 broadcast domainC. hosts on the same Layer 3 broadcast domainD. routing information on participating Layer 3 devices
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 informationB. Data link layer adds physical source destination address an FCS to the segmentC. Packets are created when the network layer encapsulate a frame with source destination host address protocol related control informationD. Packets are created when the network layers adds layers 3 address control information to a segmentE. The presentation layer translated bits into bits into voltages for transmission across the physical link
Which WAN service utilizes two different encapsulation types (one for data and one for signaling) on its data link layer?() A. ISDNB. Frame RelayC. ATMD. FDDI
Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built－in security mechanisms?() A. Frame RelayB. HDLCC. x.25D. PPP
What are two reasons a network administrator would use CDP?() A. to verify the type of cable interconnecting two devicesB. to determine the status of network services on a remote deviceC. to obtain VLAN information from directly connected switchesD. to verify Layer 2 connectivity between two devices when Layer 3 failsE. to obtain the IP address of a connected device in order to telnet to the deviceF. to determine the status of the routing protocols between directly connected routers
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.
For what two purposes does the Ethernet protocol use physical addresses?() A. to uniquely identify devices at Layer 2B. to allow communication with devices on a different networkC. to differentiate a Layer 2 frame from a Layer 3 packetD. to establish a priority system to determine which device gets to transmit firstE. to allow communication between different devices on the same networkF. to allow detection of a remote device when its physical address is unknown
What are two reasons a network administrator would use CDP (Choose two.)()。 A.to verify the type of cable interconnecting two devicesB.to determine the status of network services on a remote deviceC.to obtain VLAN information from directly connected switchesD.to verify Layer 2 connectivity between two devices when Layer 3 failsE.to obtain the IP address of a connected device in order to telnet to the deviceF.to determine the status of the routing protocols between directly connected routers
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.
Which of the following correctly describe steps in the OSI data encapsulation process?（）A、The transport layer divides a data stream into segments and may add reliability and flow control information.B、The data link layer adds physical source and destination addresses and an FCS to the segment.C、Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.D、Packets are created when the network layer adds Layer 3 addresses and control information to a segment.E、The presentation layer translates bits into voltages for transmission across the physical link.
Which WAN service utilizes two different encapsulation types (one for data and one for signaling) on its data link layer?（）A、ISDNB、Frame RelayC、ATMD、FDDI
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 informationB、Data link layer adds physical source destination address an FCS to the segmentC、Packets are created when the network layer encapsulate a frame with source destination host address protocol related control informationD、Packets are created when the network layers adds layers 3 address control information to a segmentE、The presentation layer translated bits into bits into voltages for transmission across the physical link
What is the most common cause of network congestion？（）A、aggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switchesB、speed mismatches when moving from a low-speed LAN environment to a higher speed WAN environmentC、flapping Ethernet interfaces caused by misconfigured LAN interfacesD、flapping serial interfaces caused by misconfigured WAN interfacesE、speed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment
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.
For what two purposes does the Ethernet protocol use physical addresses？（）A、to uniquely identify devices at Layer 2B、to allow communication with devices on a different networkC、to differentiate a Layer 2 frame from a Layer 3 packetD、to establish a priority system to determine which device gets to transmit firstE、to allow communication between different devices on the same networkF、to allow detection of a remote device when its physical address is unknown
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.
Which layer 2 protocol encapsulation type supports synchronous and asynchronous circuis and has built-in security mechanisms?（）A、Frame RelayB、HDLCC、x.25D、PPP
What are two reasons a network administrator would use CDP (Choose two.)（）。A、to verify the type of cable interconnecting two devicesB、to determine the status of network services on a remote deviceC、to obtain VLAN information from directly connected switchesD、to verify Layer 2 connectivity between two devices when Layer 3 failsE、to obtain the IP address of a connected device in order to telnet to the deviceF、to determine the status of the routing protocols between directly connected routers
Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? （）A、HDLCB、EthernetC、Token RingD、PPPE、FDDIF、Frame Relay
What are two reasons a network administrator would use CDP?（）A、to verify the type of cable interconnecting two devicesB、to determine the status of network services on a remote deviceC、to obtain VLAN information from directly connected switchesD、to verify Layer 2 connectivity between two devices when Layer 3 failsE、to obtain the IP address of a connected device in order to telnet to the deviceF、to determine the status of the routing protocols between directly connected routers
What are two routing requirements for a device to communicate with another device?（）A、end-to-end communications pathB、hosts on the same Layer 2 broadcast domainC、hosts on the same Layer 3 broadcast domainD、routing information on participating Layer 3 devices
单选题Which WAN service utilizes two different encapsulation types (one for data and one for signaling) on its data link layer?（）AISDNBFrame RelayCATMDFDDI
多选题What are two reasons a network administrator would use CDP? （）Ato verify the type of cable interconnecting two devicesBto determine the status of network services on a remote deviceCto obtain VLAN information from directly connected switchesDto verify Layer 2 connectivity between two devices when Layer 3 failsEto obtain the IP address of a connected device in order to telnet to the deviceFto determine the status of the routing protocols between directly connected routers
单选题What is the most common cause of network congestion？（）Aaggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switchesBspeed mismatches when moving from a low-speed LAN environment to a higher speed WAN environmentCflapping Ethernet interfaces caused by misconfigured LAN interfacesDflapping serial interfaces caused by misconfigured WAN interfacesEspeed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment
多选题Which of the following correctly describe steps in the OSI data encapsulation process?（）ATransport layer divides a data stream into segments adds reliability flow control informationBData link layer adds physical source destination address an FCS to the segmentCPackets are created when the network layer encapsulate a frame with source destination host address protocol related control informationDPackets are created when the network layers adds layers 3 address control information to a segmentEThe presentation layer translated bits into bits into voltages for transmission across the physical link
多选题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？（）AWhen 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.BThe OTV edge device performs the dynamic OTV encapsulation on the Layer 2 packet and sends it to the join interface toward the routed domain.CWhen 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.DThe OTV edge device performs the dynamic OTV encapsulation on the Layer 2 packet and sends it to the overlay interface toward the routed domain.