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Enterprise Network Architect

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$ traceroute adjacentnode.com6 hops · 21.3 ms
  1. Your laptop192.168.1.24source
  2. Home router192.168.1.10.8 ms
  3. ISP edge (CGNAT)100.64.0.16.2 ms
  4. ISP core198.51.100.1711.4 ms
  5. Internet exchange198.51.100.13018.9 ms
  6. adjacentnode.com203.0.113.1021.3 ms
How does data get from your computer to a website? One hop at a time. Every video starts with a question like this one.

Things worth figuring out

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Networking basicsHow does data get from your computer to a website?PrivacyWhat are you agreeing to when you accept website cookies?TroubleshootingHow do you figure out where a connection is failing?Home labWhat can you build and test in a home lab?

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· 10:35Don't Plug In That Fiber Until You Watch This · 3:23Why your internet used to scream at you

Field notes

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All field notes
Home LabHow to Run Cisco Modeling Labs on ProxmoxCML can run inside a Proxmox VM, but nested virtualization is the part you need to get right. Here's the setup, what to check, and where the usual problems hide.CareerMy Favorite Network Engineer Interview QuestionA good networking interview question should show how someone thinks, not just whether they memorized a command. This enterprise design prompt does exactly that.CertificationsThe CCNA Is Changing in 2027. Here Is What Actually Matters.Cisco is updating the CCNA 200-301 exam in February 2027. AI is the headline, but the more important shift is practical troubleshooting.

Free resources

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Cheat sheets, guides, checklists, packet filters and lab references. No email gate. Open what you need and get back to the problem.

Browse free resources
Wireshark display filtersCheat sheet
ip.addr == 192.168.1.24
Traffic to or from one host
tcp.flags.syn == 1 && tcp.flags.ack == 0
New TCP connections
dns
DNS queries and answers
tcp.analysis.retransmission
Segments that were sent again
http.request.method == "GET"
HTTP GET requests

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Kevin Nanns

About Kevin

I'm Kevin.

I'm a Network Architect, and I love networking and teaching how it works. You might know me as @adjacentnode.

I taught for four years before I ever touched a network, then took a NOC job in 2012 I wasn't ready for. Now I show you what your own Wi-Fi and devices are really doing, and help people starting out in networking get ready for the job.

  • Enterprise networks
  • Wi-Fi and fiber
  • Home labs
  • IT careers
Read my story

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