Networking Basics

Networking Basics DNS Lookups with nslookup and dig

When inspecting DNS, record which server received which record-type query, not just the returned address. Different resolvers can have different cache...

Networking Basics What Is DNS? Records, Resolvers and Caching

DNS is a distributed system for records associated with domain names. Finding a website's IP address is its best-known use, but mail routing and servi...

Networking Basics What Is an IP Address? IPv4, IPv6 and Local Addresses

An IP address is not a permanent personal identity. It identifies a source or destination in IP communication, and one device can have several address...