A DNS lookup, in a general sense, is the process by which a DNS record is returned from a DNS server. The basic idea of DNS is that humans can't easily remember long strings of digits like machines can, but can much more easily remember words. So, when you type in a domain name like www.techopedia.com, the request is forwarded to a DNS server (whether locally or at an ISP), which returns the corresponding IP address. This address is then used by all the computers and routers to channel the request and responses of a user's session. The result is the user sees web pages as expected or has email show up in an in-box. The two types of DNS lookups are forward DNS lookups and reverse DNS lookups. -~-~~-~~~-~~-~- Please watch: "An Introduction to Reinforcement Learning" https://www.youtube.com/watch?v=w2TsIDEq8NE -~-~~-~~~-~~-~- Best deals on SmartPhone OnePlus 3T (Midnight Black, 6GB RAM + 128GB memory) - http://amzn.to/2o0xLTi OnePlus 3T (Gunmetal, 6GB RAM + 64GB memory) - http://amzn.to/2oGLotE Moto G5 (3 GB, Fine Gold) - http://amzn.to/2nGVwhD Redmi 4A - http://amzn.to/2nGKPLY Apple iPhone 6 (Space Grey, 32GB) - http://amzn.to/2nNBLWB Honor 6X - http://amzn.to/2nNw76B Coolpad Cool 1 (Silver, 4GB) - http://amzn.to/2nNtoKr Visit My Website: http://idiotdeveloper.tk/ Visit my Blog: http://idiotdeveloper.tk/