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This is how long a remote nameserver can cache negative responses about the zone, answers that say that a particular domain name or the type of data sought for a particular domain name doesn't exist.
The main difference between Bind on FreeBSD and Bind on Linux is the path of the files or how to start the server on boot time, but major things are the same. Like the content of the configuration files.
Differences in DNS between freeBSD and Linux:
1. What is the version number of the installed BIND package?
2. What is bind tool called "named-checkconf" use for?
4. What are the names of all the other tools in the bind package?
5. We have used the dig and nslookup bind utilities in this lab, what are the other two bind utilities and what are they for?