单项选择题

Refer to the exhibit. The Linksys router in the diagram……

Refer to the exhibit. The Linksys router in the diagram is performing pNAT (port network address translation). What hash algorithm should you choose and why?（）

A.Use hash MD5 to ensure that IKE works through NAT.
B.Use ah-sha-hmac, as it does not check the integrity of the IP header. The IP header will change due to NAT.
C.Use 3DES, as it will encrypt the IPSec header IP addresses and bypass addressing issues.
D.Use esp-sha-hmac, as it does not check the integrity of the IP header. The IP header will change due to NAT.

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热门试题

单项选择题Refer to the exhibit. A Teleworker router is deployed behind a broadband Cable service. If the Teleworker router has the configuration shown, what will be the DNS server selected for DHCP clients on the LAN-side interface?（）

A.DHCP clients will automatically default to the DNS root servers for all DNS requests in the IP stacks locally.
B.DHCP clients will use the IP set in the option 150 command.
C.DHCP clients will use the DNS entry assigned by the ISP.
D.DHCP clients will have no DNS server set in the IP stack.

多项选择题Authenticationforuserdatatrafficisimportant,butsoisauthenticationforIPvoicetraffic.TheCisco830802.1featureprovidesaneasiermethodforallowingIPvoicetrafficthroughtheVPN,becauseit（）.

A.requires access lists to identify the voice traffic
B.can allow traffic from a device without 802.1X authentication, by MAC address
C.can allow traffic from Cisco IP phones by listening to their CDP advertisements
D.allows all packets marked with a ToS of 5 to bypass authentication
E.allows all IP voice packets to bypass authentication via stateful inspection

多项选择题YourServiceProviderdoesnotsupportLinkFragmentationandInterleave,butupstreamserializationdelayonyourbroadbandlinkisaffectingvoicequality.Whichtwomitigationstrategiesareviable?（）

A.Upgrade your residential broadband service to at least 768kbps uplink.
B.Switch your home router to use PPP encapsulation.
C.Use the ip tcp adjust-mss interface command.
D.Employ QoS techniques to drop large data packets.
E.Use traffic shaping to interrupt large data packets.

单项选择题Refer to the exhibit. Given the CPE deployment model, the Enterprise applications shown, and the functions being provided as designated, the appropriate product choice is（）.

A.Cisco PIX 501 Firewall
B.Cisco 831 router
C.Cisco 837 router
D.Cisco VPN3002 Hardware Client
E.Cisco ubr925 cable modem
F.Cisco SW VPN Client

单项选择题SelectakeybenefitofDSL.（）

A.TCP packet sizes can be optimized by the router so there is no IPSec or AAL5 padding.
B.The local loop is a dedicated connection for a single subscriber to the DSLAM.
C.Access to the WAN media uses a poll/response mechanism so no two subscribers transmit at the same time.
D.There are no distance requirements from the Central Office (CO).