LANDThe attack method is that the attacker sends a source address to the target host and the destination address is the target host, and the source port and the destination port are the same.
When the receiving end is waiting for the final ACK packet to be sent, the connection is always in a semi-connected state, resulting in a waste of receiving full and limited TCP resources.

• A.True
• B.False

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In the process of using the LACP protocol, which of the following descriptions is correct? (multiple choice) Eth can be avoided by-Trunk interface frequently flaps interface due to physical link eth-trunk 1 lacp preempt enable lacp preempt delay delay-time You can configure the source IP address for load balancing in an enabled link aggregation group through the following commands: interface eth-trunk 1 load-balance src-dst-ip Member interfaces can be removed from an enabled link aggregation group with the following command:
interface GigabitEthermet0/0/1 shutdownwn

• A.interface GigabitEthernet0/0/1 undo eth-trunk 1
• B.interface GigabitEthernet0/0/1 undo shutdownwn
• C.Member interfaces can be added to a link aggregation group enabled by the following command:
  interface GigabitEthermet0/0/1 shutdownwn
• D.interface GigabitEthernet0/0/1 trunkport GigabitEthernet0/0/1 interface GigabitEthermet0/0/1 undo shutdownwn

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The HW device network administrator plans to migrate the multicast network from IGMPv2 to IGMPv3. What is the improvement of IGMPv3 compared to IGMPv2? .

• A.IGMPv3 removes the ability to join all sources with a wildcard in a multicast group
• B.IGMPv3 adds the function of specifying a multicast group for a host to join a specific multicast source
• C.IGMPv3 adds between source and local IGMP queriersRequest-to-send andClear-to-send
• D.IGMPv3 adds the function of specifying a multicast group not to join a specific multicast source for a host
• E.IGMPv3 removed for membership reportingReport-suppression Features

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Which of the following statements about stacked MAD detection is wrong?

• A.MAD detection methods are divided into direct connection detection and proxy detection.
• B.MAD direct connection detection can be done through an intermediate device or full-mgsh.
• C.MAD proxy detection requires that all stack members are connected to the proxy, and the connected links are added to an Eth-Trunk.
• D.When the stacking systems act as agents for each other to perform MAD detection, the two stacking systems can use the same Domain ID

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In which of the following scenarios will gratuitous ARP packets be sent?

• A.After the DHCP client receives the confirmation message sent by the server
• B.When a host connected to the switch sends a Ping after the message
• C.When a new host with an IP address is connected to the network
• D.After the VRRP protocol master and backup role elections are completed

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