Hop Limit field in the IPv6 basic header is similar to which field in the IPv4 header?

• A.Time to Live
• B.identification
• C.Protocol
• D.Flags

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What is the relationship between CIR, BC and TC?

• A.TC=CIR/BC
• B.TC=BC/CIR
• C.CIR=TC/BC
• D.CIR=BE/TC

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QinQ technology is a technology that expands the VLAN space. It achieves the function of expanding the VLAV space by adding a layer of 802.10 Tag on the basis of the 802.1Q tag message.
Which of the following statements about QINQ is wrong?

• A.Flexible 0ino can add different outer tags according to different inner tags, which makes the division of user VLANs more detailed
• B.QinQ increases the number of VLANs to 4095*4095
• C.QinQ technology can make the private network VLA transparently transmitted on the public network
• D.Basic QinQ is implemented based on the interface method

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A bookstore provides a wired network for customers to learn online. However, some users are found unable to access the network one day. After checking, the IP resource of the DHCP address pool has been exhausted. Which of the following is the best way to solve the current problem?

• A.Configure DAI
• B.Configure a static ARP binding table.
• C.Configure IPSG
• D.Limit the maximum number of DHCP snooping binding entries that an interface can learn.

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As shown in the figure, in the IPv4 and IPv6 environment, the SEL field in the ISIS NET address always takes the value 00.

• A.True
• B.False

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