Which port is commonly used by OpenVPN for UDP tunneling by default?

• A. 1194 TCP
• B. 1194 UDP
• C. 5000 UDP
• D. 53 UDP

Answer: (C)

OpenVPN’s default setup uses UDP for tunneling on a specific port, which is 1194. UDP is chosen because it has lower overhead than TCP, reducing latency and improving throughput for VPN traffic. This makes the connection quicker to establish and maintain, especially for real-time or streaming data, where the occasional dropped packet is preferable to the delays that TCP’s reliability mechanisms can introduce.

Using the default UDP 1194 simplifies configuration and compatibility: many guides, firewalls, and NAT setups assume this port and protocol, so it’s the most widely supported starting point. While you can configure OpenVPN to use a different protocol (TCP instead of UDP) or a different port, the common, recommended default for UDP tunneling is UDP on port 1194. Other ports (like 5000 or 53) are not typical defaults and would require extra firewall and routing adjustments.