The CIDR number comes from the number of 1's in the subnet mask when converted to binary. The common subnet mask 255.255.255. is 11111111.11111111.11111111.00000000 in binary. This adds up to 24 1's, or /24 (pronounced 'slash twenty four').
IP/mask Up to the last IP in the subnet Mask Address count Class; a.b.c.d/32 +0.0.0.0: 255.255.255.255: 1: 1 / 256 C: a.b.c.d/31 +0.0.0.1: 255.255.255.254: 2: 1/128 C Internet Protocol (IPv4) Subnet Chart Aug 16, 2003 Subnet mask limitation - Linksys Community You can't set any other subnet masks. Linksys considers a LAN with more then 254 network devices to large to run on a WRT router. 255.255.255.0 is the largest LAN subnet mask you can set on a Linksys WRT. You don't explain why you think you need a 255.255.0.0 LAN subnet mask on your WRT. Solved: You Have A Subnet Mask Of 255.255.255.248, What Is You have a subnet mask of 255.255.255.248, what is the Classless InterDomain Routing (CIDR) notation? /27 /26 /28 /29 How many subnets do you get with a subnet of 192.168.1.0/28? 12 16 20 13 What are the two methods used to prevent loops in a distance vector routing protocol?
Subnet Masks - CNES
Mar 23, 2020 Classless Inter-Domain Routing - Wikipedia A subnet mask is a bitmask that encodes the prefix length associated with an IPv4 address or network in quad-dotted notation: 32 bits, starting with a number of 1 bits equal to the prefix length, ending with 0 bits, and encoded in four-part dotted-decimal format: 255.255.255.0. A subnet mask encodes the same information as a prefix length but
CIDR. Subnet Mask. Total IPs. Usable IPs /32: 255.255.255.255: 1: 1 /31: 255.255.255.254: 2: 0 /30: 255.255.255.252: 4: 2 /29: 255.255.255.248: 8: 6 /28: 255.255.255
Netmask Converter - Bitmask | Decimal | Hex | Binary Netmask Conversions If you have ever needed to know what a netmask looks like expressed in some other format this table of equivalents should help.