What Is TCP/IP and How Does It Work?

TCP/IP is the family of protocols used to move data across networks. IP handles addressing and routing; TCP provides an ordered, reliable connection for applications such as HTTPS, email and file transfer.

Core Roles

IP: addresses and routes packets
TCP: establishes reliable connections and retransmits missing data
UDP: sends datagrams without TCP's connection and delivery guarantees
DNS: maps names to network destinations

Why It Matters for Troubleshooting

Resolve the hostname to an IP address.
Check whether the destination can be reached.
Confirm that the application listens on the expected TCP or UDP port.
Check server and network firewalls.
Test the application protocol itself.

Frequently Asked Questions

How do I know the change worked?

Check the current status in your NiceNIC account, then test the service that depends on the TCP/IP connection. Do not rely only on the absence of an error message.

When should I contact NiceNIC Support?

Submit a ticket when the required control is unavailable, the status remains pending after the checks in this guide, or the issue depends on an account-specific order or registry decision.

Related NiceNIC Guides

If the issue continues after you complete these checks, submit a NiceNIC support ticket. Include the affected domain or product, the exact error message, the time of the issue and the troubleshooting already completed.