Which of the following statements about the "S" field in the MPLS packet header are true? (Choose all that apply.)
Which of the following statements about the "S" field in the MPLS packet header are true? (Choose all that apply.)
The 'S' field in the MPLS packet header is 1 bit long and indicates whether there are additional labels in the stack. When the value is 0, it means there are other labels following the current label, and when the value is 1, it signifies that this is the last label in the stack. Hence, option A is incorrect, while option C is correct. The 'S' field indeed exists in each MPLS packet header, making option D correct.
AD CORRECT
C and D, I have checked in AI (Chat GPT and Gemini)
A. "The field indicates whether there are other labels behind the current label. 1: Yes; 0: No." — This is incorrect. It's the opposite. B. "The 'S' field is 1 bit long in frame mode and 2 bits long in cell mode." — This is false. The 'S' field is always 1 bit long. C. "The field indicates whether there are other labels behind the current label. 0: Yes; 1: No." — This is true. D. "The 'S' field exists in each MPLS packet header." — This is true.
Incorrect. For A it is exactly as described. S label set to 1 means there are no more labels behind it. So the sentence is correct. C & D are correct.
A&D* (not C&D)
A&D* (not C&D)