多项选择题

Which two statements are true about broadband cable （HFC） systems？（）

A.Cable modems only operate at Layer 1 of the OSI model.
B.Cable modems operate at Layers 1 and 2 of the OSI model.
C.Cable modems operate at Layers 1， 2， and 3 of the OSI model.
D.A function of the cable modem termination system （CMTS） is to convert the modulated signal from the cable modem into a digital signal.
E.A function of the cable modem termination system is to convert the digital data stream from the end user host into a modulated RF signal for transmission onto the cable system.

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多项选择题

Which two mechanisms can be used to detect IPsec GRE tunnel failures？（）

A.Dead Peer Detection （DPD）
B.CDP
C.isakmp keepalives
D.GRE keepalive mechanism
E.The hello mechanism of the routing protocol across the IPsec tunnel

单项选择题

Refer to the exhibit. Which statement is true about the partial MPLS configuration that is shown？（）

A.The route-target both 100：2 command sets import and export route-targets for vrf2.
B.The route-target both 100：2 command changes a VPNv4 route to a IPv4 route.
C.The route-target import 100：1 command sets import route-targets routes specified by the route map.
D.The route-target import 100：1 command sets import route-targets for vrf2 that override the other route-target configuration.

单项选择题

Refer to the exhibit. Which statement is true about the configuration of split tunnels using SDM？（）

A.Any protected subnets that are entered represent subnets at the end user’s site that will be accessed without going through the encrypted tunnel.
B.Any protected subnets that are entered represent subnets at the end user’s site that will be accessed through the encrypted tunnel.
C.Any protected subnets that are entered represent subnets at the VPN server site that will be accessed without going through the encrypted tunnel.
D.Any protected subnets that are entered represent subnets at the VPN server site that will be accessedthrough the encrypted tunnel.