LPIC-1 Exam 102 v5 (Linux Administrator) — Question 109

What is true about the Hop Limit field in the IPv6 header?

Answer options

• A. The field is not changed during the transport of a package.
• B. The field is transmitted within a hop-by-hop extension header.
• C. Each router forwarding the packet increases the field's value.
• D. Each router forwarding the packet decreases the field's value.
• E. For multicast packages, the field's value is always 1.

Correct answer: D

Explanation

The Hop Limit field is decremented by each router that processes the packet, which is why option D is correct. Options A and C are incorrect as they misrepresent how the Hop Limit is adjusted. Option B is incorrect because the Hop Limit is part of the main IPv6 header, not a hop-by-hop extension header. Option E is also incorrect since multicast packets can have varying Hop Limit values.