maximum hosts on one LAN

Solution
It would depend on if any particular equipment had a limitation and what exactly you mean "lan". We have some buildings that have 30,000 employees with multiple devices each in one lan. The port count is close to 45,000. But this lan is run on layer 3 switches to reduce the broadcast domains.

If you mean subnet then you are likely going to be limited by the number of unique mac addresses a switch can hold per vlan or the size of a arp tables in routers. It still is many many thousand even though it is a horrible design.

Now some cheap consumer routers restrict you to a /24 subnet so you can not have more than 253 user machines.
It would depend on if any particular equipment had a limitation and what exactly you mean "lan". We have some buildings that have 30,000 employees with multiple devices each in one lan. The port count is close to 45,000. But this lan is run on layer 3 switches to reduce the broadcast domains.

If you mean subnet then you are likely going to be limited by the number of unique mac addresses a switch can hold per vlan or the size of a arp tables in routers. It still is many many thousand even though it is a horrible design.

Now some cheap consumer routers restrict you to a /24 subnet so you can not have more than 253 user machines.
 
Solution