The end-to-end delay is equal to the sum of all processing delays and queue delays on the path

• A.True
• B.False

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When Mr. Wang unpacked and inspected the goods, he found that the appearance of the equipment was not damaged, and all the modules of the equipment were running normally when the power was first turned on, but after 24 hours of continuous operation, the board failed, then this situation is not eligible for the DOA process.

• A.TRUE
• B.FALSE

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A DHCP server can use different address ranges to assign to clients. Which description is correct about assigning addresses? (Multiple choice)

• A.It can be the IP address used by the client, that is, the address of the Requested IP Addr Option in the DHCP DISCOVER message sent by the client
• B.It can be the IP address that the client used to conflict with other clients
• C.In the DHCP address pool, the IP address that can be allocated is searched sequentially, that is, the IP address found first
• D.It can be the IP address statically bound to the client MAC address in the database of the DHCP server
• E.Regarding the IP addresses that are over-lease and conflicting IP addresses queried by the DHCP server, if an available IP address is found, it can be assigned

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DHCP Snooping is a DHCP security feature that can be used to defend against a variety of attacks, including ( ). (Multiple choice)

• A.Defense against starvation attacks that change the CHADOR value
• B.Defense against man-in-the-middle attacks and IP/MAC Spoofing attacks
• C.Defense against DHCP spoofing attacks
• D.Defense against TCP flag attacks

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Among the following options, which of the following descriptions is wrong?

• A.LSP established by statically assigning labels can also be dynamically adjusted according to network topology changes without administrator intervention
• B.Dynamic LSPs are dynamically established through label distribution protocols such as MP-BGP
• C.The principle to be followed when manually assigning labels is: the value of the outgoing label of the upstream node is the value of the incoming label of the downstream node
• D.LSP are classified into static LSP and dynamic LSP. Static LSP are manually configured by administrators, and dynamic LSP are dynamically established using label protocols.

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