In an MPLS domain, LSR can be divided into Ingress LSR, Transit LSR and Egress LSR according to the different processing methods of LSRs for dat a. For the same FEC. a certain LSR can be the Ingress LSR of the FEC or the Transit LSR of the FEC. LSRO

• A.False
• B.True

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esigth uses different colors to distinguish different alarm levels, red represents emergency, orange represents important, and yellow represents The table is secondary, and blue represents the prompt. Which of the following statements about different alarm levels is correct: (multiple choice)

• A.Minor: There is currently a certain impact on the business, but corrective actions are required to prevent serious failure alarms
• B.Urgent: Alerts that have affected the business and require immediate corrective action
• C.Prompt: A potential or imminent business-impacting failure has been detecteD. but currently has little business impact
• D.Important: An alarm that has affected the business and will have serious consequences if not handled in time

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Which of the following is wrong about DHCP Snooping?

• A.Enable the DHCP Snooping function in the VLAN view, and the command function of DHCP messages belonging to the VLAN received by all interfaces of the device will take effect
• B.Enable the DHCP Snooping function in the interface view, then all the DHCP message command functions under the interface will take effect
• C.Enable DHCP Snooping globally, without any post parameters, the device only processes DHCPv4 messages by default
• D.DHCP Snooping can prevent illegal attacks by setting trusted ports (all interfaces are untrusted by default)

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From the user's point of view, any phenomenon that affects the business can be defined as a fault.

• A.False
• B.True

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Regarding BGP/MPLS IPVPN routing interaction, which of the following description is wrong?

• A.The ingress PE will convert the IPv4 route received from the CE into a VPNv4 route, and save it according to different VPN instances
• B.The egress PE can send IPv4 routes to the remote CE through BGP, IGP or static routing
• C.The exchange between PE and CE is IPv4 routing information
• D.After the egress PE receives the VPNv4 route advertised by the ingress PE, it filters the VPNv4 route according to the RT attribute carried by the route

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