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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Study the exhibit shown below carefully.
In this scenario the service provider wants to ensure that switch S1 is the root switch for its own network and the network of .
On which interfaces should root guard be configured to ensure that this happens？（）
A.Interfaces 11 and 12
B.Interfaces 1， 2， 3， and 4
C.Interfaces 5 and 6
D.Interfaces 5， 6， 7， and 8
E.Interfaces 1 and 2
F.Interfaces 1， 3， 5， and 6
In order to enhance worker productivity， a Cisco wireless network has been implemented at all locations.
Which three statements regarding WLAN are true？（）
A.A WLAN client will operate in half-duplex mode.
B.The Aironet 1230 access point is an example of an access point that operates solely as a lightweight access point.
C.Ad hoc mode allows mobile clients to connect directly without an intermediate AP.
D.WLANs are designed to share the medium and can easily handle an increased demand of channel contention.
E.A lightweight AP receives control and configuration from a WLAN controller to which it is associated.
F.Another term for infrastructure mode is independent service set （IBSS）.
Switch 1 was configured as shown below：
Based on the output shown above，
which statement is true？ （）
A.IP traffic matching access list is forwarded through VLANs 5-10.
B.All VLAN traffic in VLANs 5-10 that match access list will be forwarded， and all else will be dropped.
C.IP traffic matching VLAN list 5-10 will be forwarded， and all other traffic will be dropped.
D.All VLAN traffic matching VLAN list 5-10 will be forwarded， and all traffic matching access list is dropped.
E.None of the other alternatives apply
A. QoS
B. call setup and teardown
C. call routing
D. call supervision
E. audio signal compression
A. device PoE requirements
B. device IP address
C. device voice VLAN ID
D. device platform
最新試題
Refer to the exhibit. For what purpose is the command show ip cef used？（）
Refer to the exhibit. STP has been implemented in the network. Switch SW_A is the root switch for the default VLAN. To reduce the broadcast domain， the network administrator decides to split users on the network into VLAN 2 and VLAN 10. The administrator issues the command spanning-tree vlan 2 root primary on switch SW_A. What will happen as a result of this change？（）
Refer to the exhibit. The command switchport mode access is issued on interface FastEthernet0/13 on switch CAT1. What will be the result？（）
Refer to the exhibit. Which Virtual Router Redundancy Protocol （VRRP） statement is true about the roles of the master virtual router and the backup virtual router？（）
Which statement is correct about RSTP port roles？（）
Refer to the exhibit. All network links are FastEthernet. Although there is complete connectivity throughout the network， Front Line users have been complaining that they experience slower network performance when accessing the server farm than the Reception office experiences. Based on the exhibit， which two statements are true？（）
Which three statements are true of the Link Aggregation Control Protocol （LACP）？（）
Refer to the exhibit. What command was issued on the Layer 3 switch Sw1 between Exhibit #1 and Exhibit #2？（）
Refer to the exhibit. On the basis of the output of the show spanning-tree inconsistentports command， which statement about interfaces FastEthernet 0/1 and FastEthernet 0/2 is true？（）
Refer to the exhibit. What will happen when one more user is connected to interface FastEthernet 5/1？ （）