What are the header sizes for point-to-point and multi-point GRE（also known asmGRE） with tunnel key？（）A、 4 bytes for bothB、 4 bytes， and 8 bytes respectivelyC、 8 bytes for bothD、 24 bytes for both
What are the header sizes for point-to-point and multi-point GRE（also known asmGRE） with tunnel key？（）
- A、 4 bytes for both
- B、 4 bytes， and 8 bytes respectively
- C、 8 bytes for both
- D、 24 bytes for both
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