多項(xiàng)選擇題

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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多項(xiàng)選擇題

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

單項(xiàng)選擇題

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.

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

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

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

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

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