What does a Layer 2 switch do if it receives a frame with a destination MAC address that is not found in its MAC address table?() A. The frame is dropped.B. The frame is addressed with a broadcast MAC address and sent out all ports.C. The frame is sent out all ports except the receiving port.D. An ARP request is sent out all ports except the receiving port.E. A destination unreachable message is sent back to the source address.F. None of the above.
What does a Layer 2 switch do if it receives a frame with a destination MAC address that is not found in its MAC address table?()
A. The frame is dropped.
B. The frame is addressed with a broadcast MAC address and sent out all ports.
C. The frame is sent out all ports except the receiving port.
D. An ARP request is sent out all ports except the receiving port.
E. A destination unreachable message is sent back to the source address.
F. None of the above.
相关考题：
A Ezonexam Ethernet switch receives a unicast frame. with a destination MAC that is listed in the switch table. What will this switch do with the frame?A. The switch will forward the frame. to a specific portB. The switch will forward the frame. to all ports except the port on which it was receivedC. The switch will return a copy of the frame. out the source portD. The switch will not forward unicast framesE. The switch will remove the destination MAC from the switch tableF. None of the above.
What information is used by a switch to forward an Ethernet frame to its destination?() A. IP addressB. destination MAC addressC. ARP table entryD. FCS checksum
Which of one the following fields is contained within an IEEE Ethernet frame header?() A. source and destination MAC addressB. source MAC address and destination network address onlyC. source and destination network address onlyD. source network address and destination MAC addressE. source and destination MAC address and source and destination network address
What does a Layer 2 switch use to decide where to forward a received frame?() A. source MAC addressB. source IP addressC. source switch portD. destination IP addressE. destination port addressF. destination MAC address
What dose a Layer 2 switch use to decide where to forward a received frame?() A.source MAC addressB.source IP addressC.source switch portD.destination IP addressE.destination port addressF.destination MAC address
Refer to the exhibit. What will Router1 do when it receives the data frame shown?() A.Router1 will strip off the source MAC address and replace it with the MAC address 0000.0c36.6965.B.Router1 will strip off the source IP address and replace it with the IP address 192.168.40.1.C.Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.D. Router1 will strip off the destination IP address and replace it with the IP address of 192.168.40.1.E.Router1 will forward the data packet out interface FastEthernet0/1.F.Router1 will forward the data packet out interface FastEthernet0/2.
What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table()。 A.The switch will not forward unicast frames.B.The switch will forward the frame to a specific port.C.The switch will return a copy of the frame out the source port.D.The switch will remove the destination MAC from the switch table.E.The switch will forward the frame to all ports except the port on which it was received.
What three pieces of information can be used in an extended access list to filter traffic (Choose three.)()。 A.protocolB.VLAN numberC.TCP or UDP port numbersD.source switch port numberE.source IP address and destination IP addressF.source MAC address and destination MAC address
What dose a Layer 2 switch use to decide where to forward a received frame?（）A、source MAC addressB、source IP addressC、source switch portD、destination IP addressE、destination port addressF、destination MAC address
During the IPv6 autoconfiguration, what does the device append to the 64- bit prefix that it receives from the router to create its IPv6 address?（）A、a pseudora ndom generated numberB、its locally configured IPv4 addressC、the DHCP - supplied device IDD、its MAC address
What information is used by a switch to forward an Ethernet frame to its destination?（）A、IP addressB、destination MAC addressC、ARP table entryD、FCS checksum
You suspect that a hacker may be performing a MAC address flooding attack somewhere within the network. Which description correctly describes a MAC address flooding attack？（）A、The attacking device spoofs a source MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device.B、Frames with unique， invalid destination MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports.C、The attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the destination address found in the Layer 2 frames sent by the valid network device.D、The attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the source address found in the Layer 2 frames sent by the valid network device.E、The attacking device spoofs a destination MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device.F、Frames with unique， invalid source MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports.G、None of the other alternatives apply
What does a Layer 2 switch use to decide where to forward a received frame?（）A、source MAC addressB、source IP addressC、source switch portD、destination IP addressE、destination port addressF、destination MAC address
What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table?（）A、The switch will not forward unicast frames.B、The switch will forward the frame to a specific port.C、The switch will return a copy of the frame out the source port.D、The switch will remove the destination MAC from the switch table.E、The switch will forward the frame to all ports except the port on which it was received.
How does a switch respond when it receives a message?（）A、It reads the Layer-5 information and sends the message directly to the intended computer.B、It reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.C、It reads the Media Access Control (MAC) address and sends the message directly to the intended computer.D、It reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.
What three pieces of information can be used in an extended access list to filter traffic (Choose three.)（）。A、protocolB、VLAN numberC、TCP or UDP port numbersD、source switch port numberE、source IP address and destination IP addressF、source MAC address and destination MAC address
If the router R1 has a packet with a destination address 192.168.1.255, what describes the operation of the network（）。A、R1 will forward the packet out all interfaces.B、R1 will drop this packet because this it is not a valid IP address.C、As R1 forwards the frame containing this packet, Sw-A will add 192.168.1.255 to its MAC table.D、R1 will encapsulate the packet in a frame with a destination MAC address of FF-FF-FF-FF-FF-FFE、As R1 forwards the frame containing this packet, Sw-A will forward it to the device assigned the IP address of 192.168.1.255.
Which of one the following fields is contained within an IEEE Ethernet frame header?（）A、source and destination MAC addressB、source MAC address and destination network address onlyC、source and destination network address onlyD、source network address and destination MAC addressE、source and destination MAC address and source and destination network address
What does a Layer 2 switch do if it receives a frame with a destination MAC address that is not found in its MAC address table?（）A、The frame is dropped.B、The frame is addressed with a broadcast MAC address and sent out all ports.C、The frame is sent out all ports except the receiving port.D、An ARP request is sent out all ports except the receiving port.E、A destination unreachable message is sent back to the source address.F、None of the above.
单选题You suspect that a hacker may be performing a MAC address flooding attack somewhere within the network. Which description correctly describes a MAC address flooding attack？（）AThe attacking device spoofs a source MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device.BFrames with unique， invalid destination MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports.CThe attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the destination address found in the Layer 2 frames sent by the valid network device.DThe attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the source address found in the Layer 2 frames sent by the valid network device.EThe attacking device spoofs a destination MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device.FFrames with unique， invalid source MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports.GNone of the other alternatives apply
单选题What information is used by a switch to forward an Ethernet frame to its destination?（）AIP addressBdestination MAC addressCARP table entryDFCS checksum
单选题Which of one the following fields is contained within an IEEE Ethernet frame header?（）Asource and destination MAC addressBsource MAC address and destination network address onlyCsource and destination network address onlyDsource network address and destination MAC addressEsource and destination MAC address and source and destination network address
单选题What does a Layer 2 switch use to decide where to forward a received frame?（）Asource MAC addressBsource IP addressCsource switch portDdestination IP addressEdestination port addressFdestination MAC address
单选题R1 forwards a packet from Host 1 to remote Server 1. Which statement describes the use of a MAC as the frame carrying this packet leaves the s0/0/0 interface of R1（）。AThe frame does not have MAC addresses.BThe source MAC address in the frame is the MAC address of the NIC of Host 1.CThe source MAC address in the frame is the MAC address of the s0/0/0 interface of R1.DThe destination MAC address in the frame is the MAC address of the NICof server 1.EThe destination MAC address in the frame is the MAC address of the s0/0/0 interface of R2
单选题What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table（）。AThe switch will not forward unicast frames.BThe switch will forward the frame to a specific port.CThe switch will return a copy of the frame out the source port.DThe switch will remove the destination MAC from the switch table.EThe switch will forward the frame to all ports except the port on which it was received.
单选题How does a switch respond when it receives a message?（）AIt reads the Layer-5 information and sends the message directly to the intended computer.BIt reads the Media Access Control (MAC) address and broadcasts the message to all the computers that are connected to the switch.CIt reads the Media Access Control (MAC) address and sends the message directly to the intended computer.DIt reads the Layer-5 information and broadcasts the message to all the computers that are connected to the switch.
多选题What three pieces of information can be used in an extended access list to filter traffic (Choose three.)（）。AprotocolBVLAN numberCTCP or UDP port numbersDsource switch port numberEsource IP address and destination IP addressFsource MAC address and destination MAC address
单选题What dose a Layer 2 switch use to decide where to forward a received frame?（）Asource MAC addressBsource IP addressCsource switch portDdestination IP addressEdestination port addressFdestination MAC address