Cisco certified network associate (CCNA). As a developer with roots in networking, being able to troubleshoot the network — even as little as understanding the

Cisco certified network associate (CCNA). As a developer with roots in networking, being able to troubleshoot the network — even as little as understanding the 3-way TCP hand shake to identify whether even a socket has been established — helps you isolate fairly quickly whether it's your app, the server, or some intermediate device that's causing headaches.