Refer to the exhibit. Which two of these statements are correct? (Choose two.)（） 
- A、PE11 originated label 20.
- B、PE11 originated label 21.
- C、ThePE11 upstream neighbor originated label 21.
- D、The PE11 downstream neighbor originated label 20.
- E、PE11 will append label 21 to incoming packets labeled 32.
- F、PE11 will impose label 20 on incoming packets labeled 32.
正确答案:A,C
答案解析:有
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