I was a VAR network engineer for years. I worked on location in data centers and network closets to install network gear, perform various types of cutovers, and troubleshoot network problems. Even when I moved to a solutions architect role, I always kept several items with me at all times in my laptop bag when going on-site, just in case. Some items are obvious, and some I carried because I got burned when I didn’t have it with me that one time.

If you’re a network engineer managing your own network or your customers’ network, here’s a list of 10 networking tools that you should consider keeping in your bag.