Does a vlan require a extra host for VLSM

Basically I'm using the IP 192.168.0.0/16 on a network I'm making.
I have:
Staff: 250 hosts
Support: 30 hosts
Admin: 8 hosts
Servers: 5 hosts
HR: 50 hosts
Do i need to basically add 1 on to each so staff is 251 hosts.
I know we need to use a default gateway for VLAN.
I'm going to be using a 4 vlans and servers will be left as it is.

Leo
Your response would be quite appropriate if you read the first line of the original post and then composed your response without reading further. But if you read further and especially when you get to this line
I'm going to be using a 4 vlans and servers will be left as it is
then it becomes very evident that treating it as a single network space /16 is not the appropriate response.
Lee
I am not clear where you are going with this statement
Do i need to basically add 1 on to each so staff is 251 hosts. As I think about how you ask the question I wonder if this is an attempt to include/add an address for the gateway for each vlan.
But if you think carefully and clearly about the situation that you describe it becomes a series of questions about classical subnetting:
- if Staff needs 250 hosts then what subnet is large enough (but not larger) to fit 250 hosts? answer is /24. (with 254 usable host addresses)
- if Support needs 30 hosts then what subnet is large enough (but not larger) to fit 30 hosts? answer is /27. (with 30 usable host addresses) But if we also need to allow an address for the gateway (if there really are 30 Support hosts) the the address requirement becomes 31 and the subnet becomes a /26 (with 62 host addresses)
- if Admin needs 8 hosts then what subnet is large enough(but not larger) to fit 8 hosts? answer is /28. (with 14 usable host addresses) note that this may be a bit tricky since a /29 actually has 8 addresses but if you reserve an address for the subnet and an address for the broadcast then it is no longer large enough for 8 hosts.
- if Server needs 5 hosts then what subnet is large enough (but not larger) to fit 5 hosts? answer is /29. (with 6 usable host addresses)
- if HR needs 50 hosts then what subnet is large enough (but not larger) to fit 50 hosts? answer is /26. (with 62 usable hosts addresses)
HTH
Rick

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