Which of the following descriptions about the ACL matching mechanism are correct? (Multiple choice)

• A.After the packet matches the ACL, only two results will be generated: "match" and "mismatch"
• B.When the matching order of the ACL is the config mode, it will be matched in descending order of the serial number
• C.If the ACL exists but there is no rule inside the ACL, the result will be directly returned as "does not match"
• D.When the packet matches the ACL, if the packet hits the rule and the ACL action is "permit", the matching result is "match". When the packet hits the rule and the ACL action is "deny", it returns The result is "does not match"

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The default value of the ospf dr-prioritye command is 1, and the value range is 0~255.

• A.FALSE
• B.TRUE

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Which of the following descriptions about the four forwarding models of WLAN roaming traffic are correct? (Multiple choice)

• A.During the forwarding of the Layer 3 roaming tunnel, if the STA wants to access the atomic network, it needs to return the message to the HAP
• B.The difference between direct forwarding in Layer 3 roaming and tunnel forwarding in Layer 3 roaming is whether the packet needs to be returned to the HAP
• C.The difference between Layer 2 roaming forwarding and Layer 3 roaming forwarding is whether the subnet before and after STA roaming is the same subnet
• D.There is no difference between direct forwarding in layer 2 roaming and tunnel forwarding in layer 2 roaming, both are forwarded directly in the local network of FAP or FAC

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The Origin attribute is used to define the origin of BGP path information. There are three types of Origin attributes. Which of the following lists the Origin attributes in descending order of priority?

• A.IGP > EGP > Incomplete
• B.Incomplete > IGP > EGP
• C.EGP > IGP > Incomplete
• D.Incomplete > EGP > IGP

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To prevent inter-area routing loops, OSPF does not allow advertising routing information between two non-backbone areas and allows sing routing information only within an area or between the backbone area and a non-backbone area. Therefore, each ABR must be connected to the backbone area.

• A.TRUE
• B.FALSE

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