Network subnets

Sometimes, you will be given subnet masks (a range of IP addresses) to test, and in some cases, you will test only one single IP address. If you're using a subnet mask, then use the following table as a reference:

CIDR	Hosts	Net mask
/30	2	255.255.255.252
/29	6	255.255.255.248
/28	14	255.255.255.240
/27	30	255.255.255.224
/26	62	255.255.255.192
/25	126	255.255.255.128
/24	254	255.255.255.0
/23	510	255.255.254.0
/22	1022	255.255.252.0
/21	2046	255.255.248.0
/20	4094	255.255.240.0
/19	8190	255.255.224.0
/18	16382	255.255.192.0
/17	32766	255.255.128.0
/16	65534	255.255.0.0