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
Examine the diagram. A network administrator has recently installed the above switched network using 3550s and would like to control the selection of the root bridge.Which switch should theadministrator configure as the root bridge and which configuration command must theadministrator enter to accomplish this？（）
During routine maintenance， G1/0/1 on DS1 was shutdown. All other interface were up. DS2 became the active HSRP device for Vlan101 as desired. However， after G1/0/1 on DS1 was reactivated. DS1 did not become the active HSRP device as desired. What need to be done to make the group for Vlan101 function properly ？ （）
Which statement is correct about the use of the virtual interface on a WLC ？（）
Which three statements are true of the Link Aggregation Control Protocol （LACP）？（）
Refer to the exhibit and the partial configuration of switch SW_A and SW_B. STP is configured on all switches in the network. SW_B receives this error message on the console port：00：06：34： %CDP-4-DUPLEX_MISMATCH： duplex mismatch discovered on FastEthernet0/5 （not half duplex）， with SW_A FastEthernet0/4 （half duplex） ， with TBA05071417（Cat6K-B） 0/4 （half duplex）. What would be the possible outcome of the problem？（）
During routine maintenance， it became necessary to shutdown G1/0/1 on DS1 and DS2. All other interface were up. During this time， DS1 became the active device for Vlan104’s HSRP group. As related to Vlan104’s HSRP group. What can be done to make the group function properly ？ （）
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. Switch S2 contains the default configuration. Switches S1 and S3 both have had the command spanning-tree mode rapid-pvst issued on them. What will be the result？（）
Refer to the exhibit. What command was issued on the Layer 3 switch Sw1 between Exhibit #1 and Exhibit #2？（）
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？（）