Explain different types of VPNs and their uses.

VPN (Virtual Private Network) creates encrypted tunnel over public network. Types: Site-to-Site (connects networks, gateway-to-gateway), Remote Access (individual users to network), SSL/TLS VPN (browser-based, application access), IPSec VPN (network layer, comprehensive). Protocols: OpenVPN (SSL, flexible), WireGuard (modern, fast), IPSec/IKEv2 (stable, native support), L2TP (with IPSec). Uses: secure remote work, bypass geo-restrictions, privacy. Consider: latency, device support, split tunneling.