You want to set the DSCP value of VoIP traffic in HW network equipment to EF.
According to the differentiated services model RFC, the flow mark EF should be set as _____.

• A.Bitstream 101110
• B.DSCP is set to decimal 36
• C.IP Experimental ECN
• D.IPTos is set to 0xEF
• E.DSCP is set to decimal 5

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Which of the following statements about VXLAN is wrong?

• A.VXLAN packets are forwarded by routing in the Underlay network, and the Underlay does not pay attention to the terminal MAC address of the inner data frame when forwarding
• B.Introducing VXLAN technology into the campus network can realize Layer 2 and Layer 3 communication
• C.VXLAN uses MAC in UDP encapsulation to extend the Layer 2 network, encapsulating Ethernet packets on top of IP packets
• D.When deploying VXLAN, in addition to the devices at both ends of the VXLAN tunnel that need to support VXLAN, the forwarding device in the middle must also support it, otherwise VXLAN packets cannot be forwarded normally

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Regarding the processing mode of MPLS for TTL, which description is correct?

• A.Uniform simulation, when the IP packet passes through the MPLS network, the IP TTL of the ingress node is decremented by 1, and the MPLS TTL field is a fixed value.
• B.In MPLS VPN, if you want to hide the structure of the MPLS backbone network, you can use the uniform mode for Ingress packets for private network packets.
• C.The TTL of the MPLS label has the same meaning as the TTL in the IP header, which can prevent the MPLS network from generating a routing loop
• D.In Pipe mode, when an IP packet passes through the MPLS network, the IP TTL is decremented by 1 to the MPLS TTL field on the ingress node.

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As shown in the following figure, the corresponding peer relationship is established. The AS400 receives the 1.1.1.1/32 network route from the AS100. What is the AS-Path attribute?

• A.100, 200, 300, 400
• B.300, 200, 100
• C.100, 200, 300
• D.400, 300, 200, 100

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The second-layer network architecture of a company is as shown in the figure. After the engineer is configured, the services between the departments cannot be communicated. Check the status of the device as follows. Which is the possible reason? (No figure is shown, the MSTP three elements are different, causing the entry to appear on the master port.) (Multiple Choice)

• A.Instance VLAN mapping configuration between the switches is inconsistent
• B.The Region Name configuration between the switches is inconsistent
• C.The BPDU interval configuration between switches is inconsistent.
• D.The Revision Level configuration between switches is inconsistent

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