An Ethernet cable connects RTA to RTB through Ethernet 0/0.the OSPF neighbor relationship can be established without enabling the OSPF authentication function is enabled, Which of the following statements about the OSPF relationship between RTA and RTB are true?

• A.MD5 authentication is used between RTA and RTB
• B.The OSPF neighbor relationship cannot be established between RTA and RTB due to failure of area authentication
• C.The OSPF neighbor relationship can be established between RTA and RTB
• D.Simple authentication is used between RTA and RTB

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In the VRP, which of the following authentication modes are supported by the secure shell (SSH)?

• A.password
• B.password-rsa
• C.md5
• D.Rivest-Shamir-Adleman (RSA)

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Exhibit:

RTA is an edge router of the MPLS backbone network. It provides the access services for users under Layer 2 switches and different users by subinterface . User A access VLAN 12 and has subscribed to the His, VoIP, and IPTV services. According to 802 1p priorities, the value indicates the His service, 1 indicates the VoIp service, and 4 indicates the IPTV service. RTA is configured on he access side as follows.

What is the descending order of service priorities?

• A.VoIP, IPTV, HSI
• B.HSI, VoIP, IPTV
• C.IPTV, VoIP, HSI
• D.HSI, IPTV, VoIP

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As shown I the figure, the asymmetric VLL FRR networking is used AC interfaces on PE 1, PE 2 and PE 3 are
configured as follows:

Which of the following statements are the true on the condition that IGP and MPLS are configured correctly
on the public network?

• A.If a forwarding fault is detected on the PW between PE a and PE 2 , traffic can be switched to the
  backup PW on PE 1.
• B.If a forwarding fault is detected on the public network side of the between PE 1 and PE 2, traffic from
  CE 2 to CE 1 can be switched to the PW between PE 1 and PE3.
• C.The PW between PE1 and PE 2 is the primary PW.
• D.If a forwarding fault is detected on the PW between PE a and PE 2 , traffic from CE 1 to CE 2 can be
  switched to the PW between PE 1 and PE 3.

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Which of the following statements about the working principle f LDAP FRR are true?

• A.After LDP FRR enable, a backup can degenerated for a primary LSP to prevent serious packet loss during fats flapping of the primary LSP.
• B.After LDP FRR is enabled, a backup LSP is generated both the primary and backup LSPs are stored in the forwarding table.
• C.LDP TFRR can be deployed on the ingress node and the intermediate node. The primary and backup LSPas are recorded in the ILM table on the intermediate node and on the FIB table on the ingress node.
• D.Multiple LSPs can be up on the ingress node, that is entries about multiple backup LSPs are generated in the forwarding table according to the priority of the FRR, implementing multi-layer protection.

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