CORRECT TEXT
When configuring the source NAT and having no pat configuration parameters, which of the following statements is true? (Radio)

• A.Simultaneous source P address and source port translation
• B.Perform destination IP address and destination port translation
• C.Only destination IP address translation occurs
• D.Only source P address translation occurs

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NSF (Non-StoppingForwarding) and non-stop circuits are transmitted NSR (Non-Stopping Routing) are two highly reliable solutions, and the following statement is correct

• A.NSR backers require the ability to support NSR through specific message negotiation
• B.After NSF is enabled, the router is switched back, and the routing table and forwarding table remain unchanged, so traffic is not lost during grf time
• C.After NSR enablement, if the business batch backup has not yet ended, a master board failure occurs, the NSR cannot be completed
• D.NSF routers do not need to negotiate the ability to support NSF through specific messages

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The following statement about IPSG technology is correct (single choice).

• A.The IPSG can perform binding table match checks on IP packets entering and leaving the interface.
• B.If an interface is configured as the OKCP Scooing Tust interface, the interface can normally receive DHCP ACK and DHCPNAK responded to by the OHHNP server and DHCPOffer packets, other untrusted ports cannot receive these packets properly.
• C.The ip source checkuser-bind check-item command is used to configure VLAN- or interface-based IP packet checks, which take effect for both dynamic and static table entries.
• D.On Huawei routers, ipSG functions can be configured in Vlanif.

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Which of the following are used in Ethernet?

• A.Mac address in canonical format
• B.A MAC address in a non-canonical format
• C.CSMA/CD in multiplexed interviews
• D.8025 encapsulated frames
• E.8023 Encapsulated Frame

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There is an existing switch running the RSTP protocol. If the network topology changes, what happens to the Layer 2 forwarding table that is automatically learned by the switch?

• A.Table entries are dropped except for table entries related to edge ports and table entries related to ports that receive TC messages
• B.If the aging time is set to 15 seconds, entries that exceed the aging time are deleted
• C.Except for the table entry related to the edge port that is not deleted, all other table entries are deleted
• D.Only table entries related to the port that received the TC message are dropped
• E.All table entries are dropped

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