Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- initialism Classless Inter-Domain Routing; normally an
IP address notation such as 192.168.1.0/24 indicating a block of addresses. The number after theslash indicates how manybits are in themask ; bits to the right are not masked. - initialism Controlled Internal Drug Release; technology for the controlled release of a hormone or drug, for example as used to release
progesterone in beef cattle.
Etymologies
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Examples
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Only vetted CIS employees will be able to perform searches on CIDR, which is composed of mirror copies of information in the original databases.
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As Internet architects realized this approach was inefficient, they created something called "CIDR" or classless inter-domain routing, enabling addresses to be assigned into smaller blocks.
Nemertes Research - Independence, Integrity, Insight JonathanBlock 2008
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For example, in 1993, the Internet engineering community created Classless Inter-Domain Routing (CIDR) to slow the growth of the Internet's routing tables and to delay IPv4 address exhaustion.
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Further more these tier connectivity provider may choose to manage the delegation of these addresses by updating the RIPE and ARIN database with detailed information about the use of CIDR ranges by companies they have sold blocks too, or they may not.
Archive 2007-08-01 2007
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Many organisation's that have CIDR ranges delegated to them do not maintain distinctive records with RIPE and ARIN to define the difference between corporate space and user space.
Archive 2007-08-01 2007
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Regarding Blocking: One might as well block 38.0.0.0/8 CIDR.
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Regarding Blocking: One might as well block 38.0.0.0/8 CIDR.
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I have a list of over 60 networks in CIDR notation that I ban at the Apache level in a Directory section with Deny from n.0.0.0/8″, etc.
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Assume the service provider has provided the subscriber with the CIDR block
CA-95:01 CERT Advisory IP Spoofing Attacks and Hijacked Terminal Connections 1996
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In this example, a single filter can protect multiple contiguous IP networks numbers assigned as a CIDR block.
CA-95:01 CERT Advisory IP Spoofing Attacks and Hijacked Terminal Connections 1996
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