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试卷名称:思科认证640-802模拟试卷23

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Refer to the exhibit． What two facts can be determined from the WLAN diagram?

A．The area of overlap of the two cells represents a basic service set (BSS)．

B．The network diagram represents an extended service set (ESS)．可扩展的服务节点

C．Access points in each cell must be configured to use channel 1．

D．The area of overlap must be less than 10% of the area to ensure connectivity．

E．The two APs should be configured to operate on different channels．相交的地方可以设置成不同的频率

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Refer to the exhibit． Which statement describes DLCI 17? [*] DLCI 17 describes the ISDN circuit between R2 and R3． DLCI 17 describes a PVC on R2． It cannot be used on R3 or R1． DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3． DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider．

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Refer to the exhibit． The network administrator has created a new VLAN on Switch1 and added host C and host D． The administrator has properly configured switch interfaces FastEthernet0/13 through FastEthernet0/24 to be members of the new VLAN． However, after the network administrator completed the configuration, host A could communicate with host B, but host A could not communicate with host C or host D． Which commands are required to resolve this problem? [*] Router(config)# interface fastethernet 0/1．3 Router(config-if)# encapsulation dot1q 3 Router(config-if)# ip address 192．168．3．1 255．255．255．0 Router(config)# router rip Router(config-router)# network 192．168．1．0 Router(config-router)# network 192．168．2．0 Router(config-router)# network 192．168．3．0 Switch1# vlan database Switch1(vlan)# vtp v2-mode Switch1(vlan)# vtp domain cisco Switch1(vlan)# vtp server Switch1(config)# interface fastethernet 0/1 Switch1(config-if)# switchport mode trunk Switch1(config-if)# switchport trunk encapsulation isl

Which type of attack is characterized by a flood of packets that are requesting a TCP connection to a server? denial of service brute force reconnaissance Trojan horse

Refer to the exhibit．If the devices produced the given output,what is the cause of the EtherChannel problem? [*] There is a speed mismatch between SW1’s Fa0/1 and SW2’s Fa0/1 interfaces． There is an MTU mismatch between SW1’s Fa0/1 and SW2’s Fa0/1 interfaces． There is an encapsulation mismatch between SW1’s Fa0/1 and SW2’s Fa0/1 interface． SW1’s Fa0/1 interface is administratively shut down．

What SNMP message alerts the manager to a condition on the network? response trap cet capture

Which spread spectrum technology does the 802．11b standard define for operation? IR DSSS FHSS DSSS and FHSS IR, FHSS, and DSSS

Refer to the exhibit． What is the most efficient summarization that R1 can use to advertise its networks to R2? [*] 172．1．0．0/22 172．1．0．0/21 172．1．4．0/22 172．1．4．0/24 172．1．5．0/24 172．1．6．0/24 172．1．7．0/24 172．1．4．0/25 172．1．4．128/25 172．1．5．0/24 172．1．6．0/24 172．1．7．0/24

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