Nslookup is deprecated in favor of dig
Answer: Bottom up approach
Explanation:
We should start from the bottom i.e.starting from the physical layer by inspecting the lan, switches, router and also as we move up the level we also need to check the software application and the various routing protocols at each successive levels.
Hence, we use bottom up approach.
A primary key is a field that contains data unique to a record
I believe the answer is A. While inserting a checkbox
<em>Answer:</em>
<em>The first option.</em>
