Classless Inter-Domain Routing: Difference between revisions

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The standard notation for a CIDR block includes a network number (padded on the right with zero bits up to 4 [[octet]]s for [[IPv4]], and a variable length set of up to 8 16-bit [[hexadecimal]] fields for [[IPv6]]), and a prefix length, in bits, defining the size of the network in question.
 
For example : (a more complete [[Ipv4IPv4 subnetting reference]] table is available)
:192.168.0.0/24 represents the [[IPv4]] addresses 192.168.0.0 through 192.168.0.255 inclusive, with 192.168.0.255 being the broadcast address for the network.
:192.168.0.0/22 represents the [[IPv4]] addresses 192.168.0.0 through 192.168.3.255 inclusive, with 192.168.3.255 being the broadcast address for the network.