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.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.
• C.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.
• D.After LDP FRR is enabled, a backup LSP is generated both the primary and backup LSPs are stored in
  the forwarding table.

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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.Rivest-Shamir-Adleman (RSA)
• D.md5

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Which statement about the MPLS LSP Ping is true?

• A.A unique Sender's Handle is generated during each LSP Ping operation
• B.A uniquesequence number is generated during each LSP Ping operation
• C.The LSP Ping Echo request must contain the downstream mapping TLV
• D.The LSP Ping Echo request may contain the FEC stack TLV

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In the access architecture of an IP bearer network, the OSPF protocol is enabled between two access routers, two firewalls (in transparent mode), and two Layer 3 switches. Softswitches work in active/standby mode. VRRP is enabled between the softswitches to provide a gateway. In normalcases, SW1 is the master router and SW2 is the backup router. Considering the reliability of the access network, how would you plan the cost value of each link in the OSPF area?

• A.a=b=c=d
• B.d>a+b+c
• C.c>a+b+d
• D.a=b>c=d

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Which statement about the Ethernet clock synchronization technology used in actual solutions is true?

• A.The IEEE1588 technology requires the intermediate node to support transparent clock transmission.
• B.The 802.1as technology requires the intermediate node to support transparent clock transmission.
• C.The CES packet recovery technology requires the intermediate node to support transparent clock transmission.
• D.The NTP technology requires the intermediate node to support transparent clock transmission.

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