Unicast IP vs Anycast IP

Unicast IP

• Each server has its own unique IP address.

• Clients must connect to the specific IP for the desired server.

• Example:
• Server A → 12.34.56.78
• Server B → 98.76.54.32

Anycast IP

• Multiple servers share the same IP address.

• Clients are automatically routed to the closest or best-performing server based on network topology.

• Example:
• Servers A, B, and C all respond to 12.34.56.78
• A client is routed to the nearest server, minimizing latency.

Summary

• Unicast → One IP per server.

• Anycast → One IP shared across multiple servers, with routing based on proximity or performance.