Quick computer question WP

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I have wifi and of course IP address' on devices. connecting reconnecting they have the same IP address nothing changes. I'm curious if a device is off completely or sleep mode is the wifi (wireless) not being used?) Example PS3 PS4 are OFF so I THINK (assume) there is NO wireless being used or IP address assigned WHEN IT'S OFF Correct!! ! Thanks.

When a device deactivates its wireless antenna (which doesn't always happen on sleep mode, just FYI, to speed up reconnect), then the IP is indeed unused and available for other devices, assuming you use 'dynamic IP'. if you use 'static IP', the IP adress will remain reserved and unavailable for a different device, regardless of the status of the original one.

now, it shouldn't matter, since you can add 100's of IPs to even the most basic routers, so conflicts should not arrive, as long as most devices use a dynamic IP and you make sure that the static ones (if any) are unique

Depends on the DHCP lease time. A device 'leases' an address for that period, and will be given that same address the next time that it is turned on within the period. It will also have to renew the lease for the address if it expires while connected.

Addresses are only available for use by other devices if they do not have an active lease.

Each of my iOS devices have certain IP address' assigned no matter if they are on the regular network or 5G network and they stay the same. The same can be stated for the Apple TV and PS3 and 4. Oddly the 3DS gathers an IP address "automatically" so there's no idea how to look up its IP address since it's assigned to it without me knowing the IP address. Sometimes our router says "Offline" for our iPhones yet it shows we have wifi on the phones. WEIRD! Yet my Mac after going into sleep mode I ALWAYS have to find the router again and sometimes have to switch between 5G or 2. whatever G (forgot what it's called) If 5G isn't working.

My phone is really bad at cutting out in the middle of streaming music REAL bad about that issue.

Thanks!

What brand router?