IP Address Basics

1

What Is an IP Address?

Learn what IP addresses are, how they work, and why every device on the internet needs one.

5 min de lecture

2

Public vs Private IP Addresses

Understand the difference between public and private IPs, RFC 1918 ranges, and how NAT connects them.

5 min de lecture

3

How to Find Your IP Address

Step-by-step instructions to find your public and private IP on Windows, Mac, Linux, and mobile.

4 min de lecture

4

IP Geolocation: How Accurate Is It Really?

Explore how IP geolocation works, its accuracy limitations, and why your IP might place you in the wrong city.

10 min de lecture

5

IP Reputation and Blacklists Explained

Understand how IP reputation scoring works, why addresses get blacklisted, and how to check and restore your IP's standing.

11 min de lecture

6

Carrier-Grade NAT (CGNAT): What It Means for You

Learn how ISPs use CGNAT to share public IPs among hundreds of customers and what it means for gaming, hosting, and privacy.

10 min de lecture

7

Network Address Translation (NAT) Explained

Learn how NAT translates private IP addresses to public ones, enabling millions of devices to share a single public IP.

8 min de lecture

8

IP Address Classes (A, B, C, D, E)

Understand the original classful IP addressing system with Class A through E, their ranges, and why CIDR replaced it.

7 min de lecture

9

Loopback & Localhost: 127.0.0.1 Explained

Understand the loopback interface, why 127.0.0.1 is special, and how localhost is used for local development and testing.

6 min de lecture

10

How IP Addresses Are Assigned (IANA, RIRs, ISPs)

Trace the chain of IP address allocation from IANA to Regional Internet Registries to ISPs and finally to your device.

8 min de lecture

11

IP Spoofing: Risks and Prevention

Learn how attackers forge source IP addresses, the threats IP spoofing enables, and the defenses that protect against it.

7 min de lecture

12

What's My IP: How IP Detection Works

Discover how websites detect your IP address, the role of HTTP headers, proxies, VPNs, and what your IP reveals about you.

6 min de lecture

13

Multicast, Anycast, and Broadcast Explained

Learn the three methods of one-to-many communication in IP networks: multicast, anycast, and broadcast.

8 min de lecture

14

IPv4 Address Exhaustion: Causes and Solutions

Understand why the 4.3 billion IPv4 addresses ran out, the timeline of exhaustion, and the technologies extending IPv4's life.

8 min de lecture

15

IP Address Conflicts: Causes and Fixes

Learn what causes IP address conflicts on your network, how to diagnose them, and proven methods to resolve and prevent duplicate IP issues.

6 min de lecture

16

IPv4 Header Structure Explained

Break down the IPv4 packet header field by field, understanding version, TTL, protocol, checksum, and addressing fields.

9 min de lecture

17

IANA and IP Address Governance

Understand how IANA, ICANN, and the multistakeholder model govern IP address allocation and internet numbering resources.

7 min de lecture

18

Regional Internet Registries (ARIN, RIPE, APNIC)

Explore the five RIRs that manage IP address distribution globally, their service regions, policies, and WHOIS databases.

8 min de lecture

19

IP Address Privacy: What Your IP Reveals

Learn what personal information your IP address exposes, how it is used for tracking, and practical steps to protect your privacy.

7 min de lecture

20

IP Address Lookup: Best Tools and Databases

Discover the best tools and databases for looking up IP addresses, including WHOIS, geolocation services, and threat intelligence platforms.

7 min de lecture

21

IP Geolocation: How Accurate Is It Really?

How IP geolocation databases work, why they are often wrong, and what factors determine accuracy at country, region, and city levels.

11 min de lecture

22

Carrier-Grade NAT (CGNAT) Explained

What CGNAT is, how ISPs share IPv4 addresses across thousands of subscribers, and how it affects hosting, gaming, P2P, and remote access.

12 min de lecture