How to explain this LAN connection scheme?

Question

Network administration

Good afternoon! Help to understand the scheme of connection of a local area network. I have a slightly different profile, but I want to delve into and understand. The scheme is available at the link .
Briefly about the network: from the switch, the Internet enters the router, from which it goes to the switch of subscribers on the 10.0.10.0/24 network and to another router, behind which subscribers also sit on the 192.168.1.0/24 network. With this, everything is clear. I can’t understand why, and most importantly, how the switches are connected:
1) in diagram 10, port is connected to port 28 of another switch. I assume that this is so that the second switch is accessible from the 192.168.1.0/24 network, because its address is on this subnet.
2) why is the central switch, from which the Internet goes to the main router, connected to the switch 192.168.1.10? What is the point of the administrator in this?
And most importantly, how could this be implemented, because there are no Wealans! I looked at the settings, all ports are in one standard wealan, no tagged traffic. How, in this scenario, can a switch accept both the 10.0.10.0/24 subnet and the 192.168.1.0/24 subnet from another switch ??

Answer 1

1. yes, the most similar explanation to the truth. Why it was impossible to give the switch 192.168.1.11 an address from 10.0.10.0 is unknown.
2. You have already given the answer in paragraph 1 - to manage the switch.
the switch (aka switch) does not care about IP, it works one level lower, at the level of MAC addresses. On computers there are addresses from their subnets, with a gateway of 10.0.10.1 or 192.168.1.1, respectively - and that's it.
PS Entertainer Your admin is the same ....

Answer 2

I found such a feature as Traffic Segmentation. Apparently the dog is buried here. I keep searching :)