Static vs. Dynamic IP Addresses
Learn why some IP addresses stay fixed while others change automatically.
Static IP Addresses
A static IP address is manually configured and remains constant over time. It does not change unless manually updated.
Common Uses:
- Servers hosting websites or applications require static IPs to ensure accessibility.
- Networked devices like printers and security cameras often use static IPs to simplify management.
Advantages:
- Reliability for hosting services.
- Easier remote access and configuration.
Disadvantages:
- Configuration requires manual setup.
- Static IPs can be more vulnerable to hacking if not properly secured.
Dynamic IP Addresses
Dynamic IP addresses are automatically assigned by a DHCP server and may change periodically.
Common Uses:
- General internet users and devices that don’t require a fixed address, such as smartphones, laptops, and IoT devices.
Advantages:
- Easier to manage and configure automatically.
- Provides better security through periodic address changes.
Disadvantages:
- Less suitable for services requiring consistent access, like hosting a website.
Key Takeaways
- Static IPs are useful for servers, allowlists, VPNs, and predictable access.
- Dynamic IPs are assigned automatically and are simpler for most users.
- DHCP is the common system that assigns dynamic addresses.
Practice Exercise
Check your router or network settings to see whether your local IP address is assigned automatically.