Which of the following description about interfaces on the switch Access procedure receives data frame mode is correct?

• A.In Access mode, the VLAN tag of the data frame will be stripped when sending.
• B.When the data frame enters the handshaker interface, the switch will learn the destination MAC address in the data frame.
• C.In Access mode, when a tagged data frame is received, it is directly discarded.
• D.In Access mode, only data without marking is received.

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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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Regarding BGP recognized arbitrary attributes, which of the following descriptions are correct? (Multiple choice)

• A.BGP router may not recognize
• B.Must be transmitted between BGP neighbors
• C.All BGP routers must be identified
• D.It is not required to be in the Update message, and it can be decided whether to add to the Update message according to the specific situation

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The correct description in the following of BGP loop protection is: (Multiple Choice)

• A.Through the AS-PATH attribute, discard any update information received from EBGP peers that contains its own AS number in the AS-PATH attribute
• B.Any routing information from IBGP peers will be advertised to other IBGP peers
• C.Non-RR BGP routers will not announce any update information from IBGP peers to other IBGP peers
• D.DBGP routers will not announce any updates from EBGP peers to their EBGP peers

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

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