IOT on Guest Wifi

Our TP-Link AC1750 provides services for a Guest Network.  It also allows me to prohibit guests from access to my local network however I see IP addresses with same octet being assigned to guest devices as in  I would have thought the guest IPs would be on a different segment address such as or  How is the isolation being done?  I wanted to isolate our IOT devices from our local area network but still allow them access to Internet.  Maybe best to finish installing the Ubiquity EdgeRouter X for this purpose?
Lance McGrewRETIREDAsked:
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Somew products I have used create a basic VLAN for the Guest network.  It would be  agood question to post on the TPLInk website and see.
Sam Simon NasserIT Support ProfessionalCommented:
check these links from tp-link website regarding creating different subnets and vlans
Lance McGrewRETIREDAuthor Commented:
The AC1750 already has a built in preconfigured "guest network".  My question is, how does this isolate guest users from the local area network when all the IP addresses are on the same subnet?
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Sam Simon NasserIT Support ProfessionalCommented:
i did not use the guest network, but i would rather create a vlan or different subnet

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Lance McGrewRETIREDAuthor Commented:
Apparently this summarizes things:  Wireless Isolation features are less fancy. Simply enable the isolation option and all clients connected to the Wi-Fi network will be blocked from communicating with other devices on the local network. Through a system of firewall rules, clients connected to the Wi-Fi will only be able to communicate with the Internet, not each other or any machines on the wired network.

I will continue exploring the idea of creating a separate subnet.  Thanks to those who responded.
Lance McGrewRETIREDAuthor Commented:
Having a different subnet for guest network with additional firewall rules seems to be the best solution for me.
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