IPv6 Addressing - CIDR (Classless Inter-Domain Routing)
What is CIDR?
CIDR (Classless Inter-Domain Routing) is a method for allocating IP addresses and routing IP packets, replacing the older class-based system by using variable-length subnet masking (VLSM).
Why is CIDR useful?
CIDR allows for more efficient allocation of IP addresses and helps reduce routing table size by enabling route aggregation (supernetting).
How it works?
CIDR uses a suffix (e.g., /24) to indicate how many bits are used for the network portion of the address. This allows flexible subnetting and efficient IP space utilization.
Where is CIDR used?
CIDR is used in IP address allocation by ISPs, routing within and between organizations, and internet backbone routing to aggregate prefixes.
Which OSI layer does this protocol belong to?
CIDR operates at the Network Layer (Layer 3) as it deals with IP addressing and routing.
Is CIDR Windows specific?
No, CIDR is not Windows specific. It is a general IP addressing method supported by all operating systems.
Is CIDR Linux specific?
No, CIDR is not Linux specific. It is supported universally across all platforms that use IP networking.
Which Transport Protocol is used by CIDR?
CIDR is not tied to any transport protocol. It affects IP routing, which works with both TCP and UDP, among others.
Which Port is used by CIDR?
CIDR does not use any ports. It is a method of IP address representation and routing, not a service or application.
Is CIDR using client-server model?
No, CIDR is not a communication protocol but an addressing scheme. It does not follow the client-server model.
In this section, you are going to learn
Terminology
Version Info
rfc details
setup
setup
packet details
usecases
features
Reference links