Glue records ≠ A record replacement

Anurag Bhatia
Someone recently reached out to me discussing DNS and as that person started taking deep dive in DNS, he came across the glue records. He asked me “Why not just use A records on a sub-zone with glue record at the parent zone”? This was a fantastic question. I am going to document it in this post on why not. First and foremost let’s have a clear understanding of glue records.