Question 1

What is an IP address?

Accepted Answer

An IP (Internet Protocol) address is a unique numerical label assigned to every device connected to a computer network. It enables routing hardware, APIs, and servers to route traffic accurately back to your gateway.

Question 2

How do I find my public IP address?

Accepted Answer

You can find your public IP address instantly by visiting https://whatismyipaddress.tech/. Your IPv4/IPv6 address, ISP name, and location are automatically detected and displayed.

Question 3

What is CIDR subnet notation?

Accepted Answer

CIDR (Classless Inter-Domain Routing) notation appends a slash and prefix number (e.g. /24) to an IP address, representing the number of leading bits in the subnet mask. For instance, /24 corresponds to 255.255.255.0 and provides 254 usable host addresses.

Question 4

How does DNS-over-HTTPS (DoH) improve privacy?

Accepted Answer

DNS-over-HTTPS encrypts DNS queries via HTTPS protocols, preventing ISPs, public Wi-Fi operators, or malicious eavesdroppers from viewing or tampering with the domain names you resolve.

Question 5

What is the difference between IPv4 and IPv6?

Accepted Answer

IPv4 uses 32-bit numerical addresses giving ~4.3 billion addresses. IPv6 uses 128-bit hexadecimal addresses giving 340 undecillion addresses, designed to replace IPv4 address exhaustion.