How is CIDR different from an autonomous system?

Question

Computer networks

How is CIDR different from an autonomous system? There is an example for distributing ip addresses for a small network according to CIDR. But what is the distinguishing feature of AS and will this table be true for AS?
Class B range given: 172.16.0.0-172.31.255.255

Answer 1

CIDR is one way to write IP address ranges, nothing more.
Just a way to write that "ip-addresses of accounting computers are in the range 172.16.0.0-172.16.255.255":
172.16.0.0/16 departments and, accordingly, the ip-subnets of the enterprise as a whole or, at least, an isolated branch, because:
- there is a separate plan for allocating ip-addresses -
there is a separate network administrator
routing protocols, such as BGP, it is customary for each enterprise to allocate its own identifier - the so-called. ASN, Autonomous System Number.
It must be understood that ASN is a purely BGP term.
If an organization is connected to the Internet through a single interface of a single provider, then it does not need BGP.
Accordingly, it turns out that formally it still has an autonomous system (as a set of ip-networks used in the organization and mechanisms for managing them), it’s just that it has not been assigned an ASN number.
In real life, as a rule, the concept of an autonomous system appears not in the description of the network infrastructure of an organization, but in the rules for exchanging traffic between two different organizations:
- parameters of the physical and ip-junctions of two autonomous systems
- which ip-subnets belonging to each AS should be available to the partner at the junction

Answer 2

An autonomous system is a group of IP networks.
CIDR is a routing method.
Your question is similar to something like this: what is the difference between a tomato and an antenna.

Answer 3

CIDR - The principle of addressing networks without classes (theory).
AS - autonomous system (specific value).
I think that "principle" and "system" are completely different in their semantic meaning.
In the table you proposed, I did not find AS. Perhaps because this concept does not apply to 172.16.xx.