In case you want to document a network diagram in a fast way without using a graphical tool, you can find the necessary ASCII characters on this wiki page . In this way you can draw boxes and connectors. See the following example.
Internet
---------------------------------------------------------------------------
❰PUBLIC-IP❱
|
┌────────────┐ ┌────────────┐ ┌────────────┐ ┌────────────┐
│Master-Node │ │ Worker-1 │ │ Worker-2 │ │ Worker-3 │
└────────────┘ └────────────┘ └────────────┘ └────────────┘
├───────────────────┼─────────────────┼──────────────────┤
❰10.0.0.2❱ ❰10.0.0.3❱ ❰10.0.0.4❱ ❰10.0.0.4❱
---------------------------------------------------------------------------
Private Network 10.0.0.0/24
And here is another example:
╔═╧═╧═╧═╧═╧═╧══╗
║ Ardoino Nano ║
╚═╤═╤═╤═╤═╤═╤══╝
│ │ ╭────────╮
│ ╰──────────┤Sensor-2│
│ ╰────────╯
╭────┴───╮
│Sensor-1│
╰────────╯