Which of the following is the correct understanding of the LVS+tomcat cluster model? (Multiple choices)

Which of the following is the correct understanding of the LVS+tomcat cluster model? (Multiple choices)
A . LVS-NAT, Network Address Translation, modify the target IP of the request message
B . This load scheduling technology implemented in the Linux kernel is called Linux Virtual Server (LVS)
C . LVS-DR: Direct Routing, controlling the encapsulation of new MAC addresses
D . LVS-TUN: IP Tunneling, adding a new IP header to the original request IP message

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Answer: ABCD