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单选题
Which of the following devices is used to move frames between a source and destination basedon a MAC address?（）
A
Repeater
B
Hub
C
Router
D
Switch
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What will an Ethernet switch do if it receives a unicast frame with a destination MAC that is listed in the switch table()。
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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
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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.
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考题
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
考题
Which of the following devices is used to connect multiple devices to a network and does not stopbroadcast traffic?（）A、SwitchB、HubC、ModemD、Repeater
考题
Which of the following devices is used to move frames between a source and destination basedon a MAC address?（）A、RepeaterB、HubC、RouterD、Switch
考题
A layer 3 switch can move packets between subnets based on which of the following criteria?（）A、802.1q tagB、PortC、ApplicationD、IP address
考题
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？（）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
考题
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?（）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.
考题
单选题Which of the following descriptions about IP spoofing is correct？（）A
IP source address is forgedB
IP destination address is forgedC
IP TCP source port is forgedD
IP TCP destination port is forgedE
None of above
考题
单选题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
考题
单选题A layer 3 switch can move packets between subnets based on which of the following criteria?（）A
802.1q tagB
PortC
ApplicationD
IP address
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