Which of the following describes CIDR as it relates to routing?

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Multiple Choice

Which of the following describes CIDR as it relates to routing?

Explanation:
CIDR is the routing method that uses variable-length IP prefixes to identify networks, replacing the old fixed classful boundaries. By assigning a prefix length like /20 or /23, routers can group several smaller networks into one entry. This enables route aggregation (supernetting), so a single routing table entry can represent many subnets, which reduces the size of routing tables and speeds up lookups. NAT translates addresses between networks, and APIPA is the self-assigned 169.254.x.x range used when DHCP fails, so they’re not CIDR. Subnetting is the process of dividing networks, and CIDR builds on that idea by using arbitrary prefix lengths to enable efficient routing and aggregation.

CIDR is the routing method that uses variable-length IP prefixes to identify networks, replacing the old fixed classful boundaries. By assigning a prefix length like /20 or /23, routers can group several smaller networks into one entry. This enables route aggregation (supernetting), so a single routing table entry can represent many subnets, which reduces the size of routing tables and speeds up lookups. NAT translates addresses between networks, and APIPA is the self-assigned 169.254.x.x range used when DHCP fails, so they’re not CIDR. Subnetting is the process of dividing networks, and CIDR builds on that idea by using arbitrary prefix lengths to enable efficient routing and aggregation.

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