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 phút đọc

2

Public vs Private IP Addresses

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

5 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

13

Multicast, Anycast, and Broadcast Explained

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

8 phút đọc

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 phút đọc

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 phút đọc

16

IPv4 Header Structure Explained

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

9 phút đọc

17

IANA and IP Address Governance

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

7 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc

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 phút đọc