Are IP Segments with the same Subnet mask isolated at the basic network layer

[fozzie bear]

This is a very basic newbie question so please be kind

I am setting up a new router for my home network, and I want to create 4 Vlans:-

• Vlan0-DEFAULT-10.0.0.0/24 This will be my main secure network for my pc laptops and server
• Vlan1- GUEST-10.0.1.0/24 For guest internet access. I know from reading that selecting Guest in the setup that they are isolated from everything but the internet.
• Vlan2- IOT-10.0.2.0/24 For my wireless IOT devices
• Vlan 3-CCTV-10.0.3.0/24 For all my CCTV cameras

Q1 Are these all different subnets even though they share the same netmask and do they provide basic separation?

Q2 On my current ISP gateway I’m running out of IP addresses as I have numerous static IPs for devices I don’t want changing. Does each of the above have 253 separate available IP addresses?

Q3 When configuring VLans in a router does the DHCP server serve out IP addresses for each Vlan range as above

The router is a TP-Link ER7212PC (I know..... but that’s what I’ve purchased because its got built in Omada controller to mange my TP-Link EAP245 access points) and by default all Vlans can communicate with each other rather than be isolated by default.
I’m talking to TP-link to see if I can use Gateway ACLs to block traffic from Vlans 2 and 3 from communicating with Vlan0 whilst still being able to access devices on these Vlans 2 and 3 from Vlan0

This is a home network and I’m not looking for enterprise security just something better than my current setup where everything is on the same subnet

Many thanks
John

 

[ColinTaylor]

A1 Yes. VLANs are separate networks. The IP addresses and netmasks used don't really have anything to do with that (provided they don't conflict).
A2 Yes.
A3 Usually, but I'm not familiar with your specific hardware.

 

[fozzie bear]

A1 Yes. VLANs are separate networks. The IP addresses and netmasks used don't really have anything to do with that (provided they don't conflict).
A2 Yes.
A3 Usually, but I'm not familiar with your specific hardware.

Many thanks @ColinTaylor . I appreciate your reply and confirmation
John