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Unformatted text preview: duration of the TTL and then discarded. What should a security aware resolver do if t + n > t 1 ? Problem 7 (Optional) In your own words, what purpose does the type bit maps eld serve in the NSEC resource record? Problem 8 (Optional) In your own words, describe the meaning of each eld in the DNSKEY resource record. Problem 9 In your own words, what is the purpose of the key tag in the RRSIG resource record? While it is a required eld in the wire format, would it be possible to write a security-aware resolver that didnt use this eld? Page 1 of 2 CS 217A (Lixia Zhang ): Homework 8 Problem 10 Problem 10 (Optional) In your own words, why does the RRSIG resource record need to have the original TTL eld, and why cant the TTL eld that all RRsets have in them be used instead? Page 2 of 2...
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This note was uploaded on 01/20/2012 for the course CS 217 taught by Professor Staff during the Winter '08 term at UCLA.
- Winter '08