Which of the following statements is true about the role of ping and tracert?

• A.Pingthrough one-wayicmp echo requestPacket inspection and bidirectional reachability of the correct end
• B.pingThe reachability from the local end to the peer end is verifieD. but it does not mean that the peer end to the local end must be reachable
• C.tracertandpingThe function is the same, just the name is different
• D.TracertMust be able to trace every hop from source to destinationIPaddress

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IGP converges faster than BGP, which may cause network traffic loss. By enabling the OSPF and BGP linkage feature of the device, the device remains as a () router within the set linkage time, so that the link metric value in the advertised LSA is the maximum value, thereby telling other OSPF devices not to use this router to forward data, so as to avoid the loss of traffic. (Note: If English letters are involved, all capitals are required)

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Which of the following statements about VLAN aggregation is correct? (Multiple choice)

• A.A Super-VLAN can contain one or more SUb-VLANs
• B.Sub-VLAN is used to isolate the broadcast domain
• C.Sub-VLAN contains physical interfaces. A three-layer VLANIF interface can be established
• D.Super-VLAN only contains physical interfaces and cannot establish a Layer 3 VLANIF interface

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As shown below:

• A.R3andR1different area codes
• B.R3andR1ofIIHAuthentication failed
• C.R3andR1ofIS-LevelMismatch
• D.R3andR1ofSystem

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Regarding the description of the MPLS forwarding mechanism, which of the following is correct? (Multiple choice)

• A.The system automatically assigns an ID to the upper-layer application that uses the tunnel, also known as Tunnel ID
• B.If the Tunnel ID value is 0x0, and then enter the MPLS forwarding process
• C.If the Tunnel ID value is not 0x0, and then enter the normal IP forwarding process
• D.When an IP packet enters the MRLS domain, the FIB table is the first to be checked

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