What is the fine-grained topic of the following text: When we can't connect to a database server, we are most likely to suggest to a colleague to look at the firewall configuration first, or connect directly to IP address, or connect to named pipes instead of TCP/IP, etc, it's rare of us to suggest to look first if the network cable is disconnected, you get my drift. Only return the topic.
Troubleshooting Connection Issues with a Database Server