What is true about SYN cookies？（）
- A、 All TCPoptions are supported， such as largewindows.
- B、 The server can have more than8 unique MSS values.
- C、 SYN cookies are not implemented as a method of defending against SYN floods.
- D、 SYN cookies are implemented as a method of defending against SYN floods.
正确答案:D
答案解析:有
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