In different scenarios, RSTP provides different protection functions, and the wrong statement about this statement is

• A.The root protection feature is enabled for the specified port, and its port role can only remain as the specified port
• B.Start the specified port of root protection, when the port receives a better RSTBPDU, the port will enter the Discarding state and is no longer forwarding packets. If the port does not receive a better RSTBPD for a period of time then automatically revert to the normal Forwarding state
• C.When the anti-TC-BPDU packet attack feature is enabled, the number of times the switching device processes IC BPDU packets per unit time is configurable
• D.after the BPDU protection function is enabled on the switching device, if the edge port receives RST BPDU, the edge port will be set to a non-remote port and the spanning tree calculation will be re-performed

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You are now troubleshooting a LAN, and you suspect that the error is due to a mismatch in the work mode.
Which switch interface error indicates that the 10/100/100O IEE gigabit interface operating mode does not match? (Multiple choice questions).

• A.Super Small Frame
• B.Lag conflicts
• C.Excess Conflict
• D.Alignment error
• E.FCS error

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Regarding IPv6 over IP4(19) road, the following statement is correct

• A.The ISATAP tunnel determines the destination IPV4 address of the tunnel based on the destination IP6 address.
• B.The 6to4 automatic tunnel requires the use of a specific IP6 address segment, and the assigned address segment is preceded by 3ffe::/16
• C.Automatic tunneling has great advantages over manual tunneling, and manual tunneling will be phased out
• D.When configuring manual tunneling on the VRP platform, a Tunnel interface is generally created; When configuring automatic tunneling, a Vrua-Template interface is usually created
• E.All automatic tunnels encapsulate data in the same way.

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What is wrong with the following statement about digital certificates?

• A.Authentication fails when the peer certificate is received within the validity period, but the device itself is in the wrong time if it is not within the validity period of the certificate.
• B.Digital certificates contain public key information.
• C.Digital signatures guarantee the integrity of digital certificates.
• D.Even if two PRI entities are not in the same CA system, authentication can be completed as long as both parties can recognize each other's CA.

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When DLDP detects the presence of a one-way link in the fiber, the default actions of Huawei equipment include: the DLDP state machine migrates to the Disable state, outputs Trap information, and automatically sets the interface to a blocked state.

• A.True
• B.False

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