Classless interdomain routing (CIDR) allows for the aggregation of different classes of IPv4 addresses. In the original IPv4 scheme, IP addresses were designated according to class, and this designation was illustrated in the values of the different octets of a given IPv4 address. When the IETF and other similar organizations began to recognize...
A client access license (CAL) is a type of license binding the licensee to a set of user terms limiting how the organization's services are used. This is typically done using software accompanied by a certificate of authenticity and a several digit license key. The end user is required to verify their CAL by transposing the license key numbers into a designated field prior to downloading the software.
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