How to understand the architecture of an organization's local network?

Question

Computer networks

I am an IT specialist, but not an admin. They hired me as an administrator in a place where there had not been a normal IT specialist for a long time. So far, I understand that there is such and such a number of computers, one router, a server and 6 points that distribute Wi-Fi.
They ask to understand the architecture of the local network and present the scheme to the management. Tell me how to do it better?

Answer 1

Start with an inventory of all equipment, and when it is clear how many switches and where they are, you can start tracing the wiring.
Preferably a "smart" lantester, and not a stupid dial tone.

Answer 2

Start by sitting down at one of the computers, looking at its settings, exploring the network environment, pinging this and that, typing in the console arp -a, and then how it goes.

Answer 3

It is important to find out: is there DHCP? if so, is it on the router or on the server? DNS local is? if so, is it on the router or on the server? Among the switches there are managed ones (google characteristics according to the switch model)?
The rest has already been well answered, there is no point in repeating it.

Answer 4

Pencil in hand and walk around and sketch the diagram freehand. And then draw beautifully in visio or LO Draw. This is for starters..

Answer 5

The scheme is drawn in ms visio from the subscriber device to the gateway and uplink internet. A couple of hours would be enough for me. Tools - logic, ping and traceroute.

Answer 6

Here is such a program.
Everything is automated, almost like in Visio it turns out. Walking with a pencil, and then importing into Visio with pens, I think yesterday, ..
Here's what the site says

With it, you can scan the network topology and find all connected devices. All discovered computers, switches and routers are placed on the map.
If your switches support the SNMP protocol, the program will detect the network topology and draw connections between devices automatically. It also supports trace route and LLDP protocol.