In the network shown in the figure, the R1 device is configured with route penetration, then the R1 device sends the LSP of Leve1-2 to R3, so that R3 can learn the entire network route.

• A.True
• B.False

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Which of the following scenarios is not suitable for deploying interface policy routing?

• A.On the core switch, draw the traffic from the internal network and external network to the AC device that is connected to the bypass
• B.In the scenario of multiple ISP outlets in the corporate network, different network segments of the intranet access the Internet through different ISP outlets
• C.Modify the traffic originated locally-hop
• D.On the core switch, the traffic of mutual access between the internal network and the external network is dragged to the side-mounted security detection device

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Compared with routers and switchies, what are the unique modules for firewall forwarding?

• A.LPU
• B.Switching network board
• C.MPU
• D.SPU

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Which of the following description of roaming is wrong? (Multiple choice)

• A.The working channels of the two APs before and after the immersion can be different
• B.When roaming, the STA that associates with the new AP sends a re-association request and contains the information of the original associated AP
• C.When roaming, the STA that associates with the new AP sends an association request and contains the information of the original associated AP
• D.The working channels of the two APs before and after roaming must be the same

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Which of the following statements about BFD applications is correct? (Multiple choice)

• A.The linkage between BFD and OSPF is to associate BFD with OSPF, and then notify OSPF through BFD's rapid sensing of link failures, thereby speeding up OSPF's response to network topology changes
• B.BFD multi-hop detection means that BFD can detect any path between two systems. These paths may span many hops or overlap in some parts.
• C.BFD single-hop detection refers to the IP connectivity detection of two directly connected systems
• D.The single-arm echo function is to detect the connectivity of the forwarding link through the loopback operation of BFD packets

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