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  2. Classless Inter-Domain Routing - Wikipedia

    en.wikipedia.org/wiki/Classless_Inter-Domain_Routing

    Shorter CIDR prefixes match more addresses, while longer prefixes match fewer. In the case of overlaid CIDR blocks, an address can match multiple CIDR prefixes of different lengths. CIDR is also used for IPv6 addresses and the syntax semantic is identical. The prefix length can range from 0 to 128, due to the larger number of bits in the address.

  3. Template:IP range calculator - Wikipedia

    en.wikipedia.org/wiki/Template:IP_range_calculator

    The result uses CIDR notation and can be used by an administrator to block a range of IP addresses. The template can be used by editing any page, inserting the template, and previewing the result. There is no need to save the edit. As an example, you could edit your sandbox and replace its contents with

  4. Supernetwork - Wikipedia

    en.wikipedia.org/wiki/Supernetwork

    The ISP might then assign subnetworks to each of their downstream clients, e.g., Customer A will have the range 172.1.1.0 to 172.1.1.255, Customer B would receive the range 172.1.2.0 to 172.1.2.255 and Customer C would receive the range 172.1.3.0 to 172.1.3.255, and so on. Instead of an entry for each of the subnets 172.1.1.x and 172.1.2.x, etc ...

  5. Longest prefix match - Wikipedia

    en.wikipedia.org/wiki/Longest_prefix_match

    For example, consider this IPv4 forwarding table (CIDR notation is used): 192.168.20.16/28 192.168.0.0/16 When the address 192.168.20.19 needs to be looked up, both entries in the forwarding table "match". That is, both entries contain the looked up address.

  6. Template:IPnr - Wikipedia

    en.wikipedia.org/wiki/Template:IPnr

    Such a range cannot be written as a single CIDR range, but consists of two CIDR ranges, i.e. 123.123.123.0/24 and 123.123.124.0/24. Please note that this is a very simple example, much more complicated cases do exist in reality.

  7. Talk:Classless Inter-Domain Routing - Wikipedia

    en.wikipedia.org/wiki/Talk:Classless_Inter...

    Both of these are not really CIDR Calculators. A CIDR calculator needs to tell you if your CIDR is valid and then do the expansion and show the mask the range and stuff. These two are subneting calculators. The second does not really work. The first would be OK for the subneting article but someone can already see all these tables in the article .

  8. Reserved IP addresses - Wikipedia

    en.wikipedia.org/wiki/Reserved_IP_addresses

    Address range Number of addresses Scope Description ... (CIDR) First address ... Addresses used in documentation and example source code [19] 5f00::/16

  9. Subnet - Wikipedia

    en.wikipedia.org/wiki/Subnet

    Since the introduction of CIDR, however, the assignment of an IP address to a network interface requires two parameters, the address and a subnet mask. Given an IPv4 source address, its associated subnet mask, and the destination address, a router can determine whether the destination is on a locally connected network or a remote network.