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- Wildcard_mask abstract "A wildcard mask is a mask of bits that indicates which parts of an IP address are available for examination. In the Cisco IOS, they are used in several places, for example: To indicate the size of a network or subnet for some routing protocols, such as OSPF. To indicate what IP addresses should be permitted or denied in access control lists (ACLs).At a simplistic level a wildcard mask can be thought of as an inverted subnet mask. For example, a subnet mask of 255.255.255.0 (binary equivalent = 11111111.11111111.11111111.00000000) inverts to a wildcard mask of 0.0.0.255.A wild card mask is a matching rule The rule for a wildcard mask is:0 means that the equivalent bit must match1 means that the equivalent bit does not matterAny wildcard bit-pattern can be masked for examination: For example, a wildcard mask of 0.0.0.254 (binary equivalent = 00000000.00000000.00000000.11111110) will allow even-numbered IP addresses to be examined. A 0 octet in the wildcard mask indicates that the corresponding octet in the network must match exactly. On the other hand, a 254 indicates that you don't care what the corresponding octet is in the network except for the host(255) bit.A network and wildcard mask combination of 1.1.1.1 0.0.0.0 would match an interface configured exactly with 1.1.1.1 only, and nothing else. This is really useful if you want to activate OSPF on a specific interface in a very clear and simple way. If you insist on matching a range of networks, the network and wildcard mask combination of 1.1.0.0 0.0.255.255 would match any interface in the range of 1.1.0.0 to 1.1.255.255. Because of this, it's simpler and safer to stick to using wildcard masks of 0.0.0.0 and identify each OSPF interface individually, but once configured, they function exactly the same -- one way is not better than the other.Wildcard masks are used in situations where subnet masks may not apply. For example, when two affected hosts fall in different subnets, the use of a wildcard mask will group them together.".
- Wildcard_mask wikiPageID "17160426".
- Wildcard_mask wikiPageLength "2572".
- Wildcard_mask wikiPageOutDegree "10".
- Wildcard_mask wikiPageRevisionID "654343689".
- Wildcard_mask wikiPageWikiLink Access_control_list.
- Wildcard_mask wikiPageWikiLink Bit.
- Wildcard_mask wikiPageWikiLink Category:Internet_architecture.
- Wildcard_mask wikiPageWikiLink Category:Network_addressing.
- Wildcard_mask wikiPageWikiLink Category:Routing.
- Wildcard_mask wikiPageWikiLink Cisco_IOS.
- Wildcard_mask wikiPageWikiLink IP_address.
- Wildcard_mask wikiPageWikiLink Mask_(computing).
- Wildcard_mask wikiPageWikiLink OSPF.
- Wildcard_mask wikiPageWikiLink Open_Shortest_Path_First.
- Wildcard_mask wikiPageWikiLink Subnet_mask.
- Wildcard_mask wikiPageWikiLink Subnetwork.
- Wildcard_mask wikiPageWikiLinkText "wildcard mask".
- Wildcard_mask hasPhotoCollection Wildcard_mask.
- Wildcard_mask wikiPageUsesTemplate Template:Reflist.
- Wildcard_mask subject Category:Internet_architecture.
- Wildcard_mask subject Category:Network_addressing.
- Wildcard_mask subject Category:Routing.
- Wildcard_mask hypernym Mask.
- Wildcard_mask type Weapon.
- Wildcard_mask type Identifier.
- Wildcard_mask type Protocol.
- Wildcard_mask comment "A wildcard mask is a mask of bits that indicates which parts of an IP address are available for examination. In the Cisco IOS, they are used in several places, for example: To indicate the size of a network or subnet for some routing protocols, such as OSPF. To indicate what IP addresses should be permitted or denied in access control lists (ACLs).At a simplistic level a wildcard mask can be thought of as an inverted subnet mask.".
- Wildcard_mask label "Wildcard mask".
- Wildcard_mask sameAs m.043m82f.
- Wildcard_mask sameAs Q8000986.
- Wildcard_mask sameAs Q8000986.
- Wildcard_mask wasDerivedFrom Wildcard_mask?oldid=654343689.
- Wildcard_mask isPrimaryTopicOf Wildcard_mask.