Which statements about the edge access layer is true?

• A.Using the packet technology it provides a comprehensive transport platform that boasts high reliability, quality of service (QoS) assurance, and large capacity.
• B.It connections users to the network by providing various access means, and converts the format of information can be transmitted on the network.
• C.It process additional value-added service and operation support for established callas.
• D.It implement call control. With the software technology as the core, it completes basic real-time call control and connection control.

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The Huawei router is the hop RD where the SSM mapping function is enabled at the interface. Some IGMPv2 hosts expect to receive (1.0.01,232.1.0.1) (1.0.0.1232.1.0.2), and (2.0.0,232.1.3.2) dat a. How can you satisfy the preceding requirement with the least configurations?

• A.ssm-mapping 232. 1 308 2 00.1
• B.ssm-mapping 232 1.0. 1 32. 1. 0. 0. 1
• C.ssm-mapping 232.1.3.2 16.2.0.0.1
• D.ssm-mapping 232. 1.0. 2. 32. 1. 0. 0. 1
• E.ssm-mapping 232. 1. 0. 0. 24. 1. 0. 0. 1
• F.ssm mapping 232.1.3.1.24.2.0.0.1

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Which statement about MPLS Echo packets is true?

• A.The type value of the MPLS Echo reply packet is 8
• B.The MPLS Echo request is an ICMP packet.
• C.The type value of the MPLS Echo request packet is 0.
• D.The MPLS Echo request is a UDP packet.

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Which of the following statements describe the reliability requirements of the voice service for the IP bearer network?

• A.The IP network uses a full/half-meshed structure and provides redundant links to strengthen the self-healing capability.
• B.Link protection switching time = 50 ms
• C.Key modules of equipment must support active/standby switching or other redundancy backup functions.
• D.Link protection switching time can larger than 150 ms

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BFD for RSVP is a mechanism that uses BFD to check the connectivity of RSVP neighbors. As shown in the figure, TE FRR node protection is deployed to protect a node, the blue path is the primary LSP (RTA -> RTB -> RTC -> RTD -> RTE) and the red one is the bypass LSP (RTB -> RTF -> RTD). Which of the following statements about BFD for RSVP are true?

• A.The BFD session triggered by RSVP is for the exclusive use of RSVP.
• B.Only RSVP HELLO needs to be enabled if RSVP GR instead of TE FRR is deployed on a network.
• C.BFD for RSVP needs to be enabled only on RTB if you expect to set up a BFD for RSVP session on RTB to check the connectivity between RTB and RTC.
• D.TE FRR will be triggered only when the link between RTB (acting as the PLR) and RTC (the node under protection) is faulty or RTC is faulty but will not be triggered when the link between RTC and RTD (acting as the MP) is faulty. This problem can be solved by establishing a BFD session between RTB and RTD. In this case, faults may be reported falsely or be missed.

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