Which term describes a connected group of IP prefixes run by operators with a single routing policy?

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Multiple Choice

Which term describes a connected group of IP prefixes run by operators with a single routing policy?

Explanation:
A single routing policy applied across a connected set of IP prefixes describes an Autonomous System. In Internet routing, organizations group their networks into an AS, administered under one policy and identified by an Autonomous System Number. Inside the AS, internal routing can use various protocols, but externally it presents a unified policy to other networks via BGP, which is what makes this unit meaningful for inter-domain routing. The other terms don’t capture that same scope: a domain is more about naming and scope, a VLAN is a Layer 2 segmentation within a local network, and a subnet is just a block of addresses within a larger network.

A single routing policy applied across a connected set of IP prefixes describes an Autonomous System. In Internet routing, organizations group their networks into an AS, administered under one policy and identified by an Autonomous System Number. Inside the AS, internal routing can use various protocols, but externally it presents a unified policy to other networks via BGP, which is what makes this unit meaningful for inter-domain routing.

The other terms don’t capture that same scope: a domain is more about naming and scope, a VLAN is a Layer 2 segmentation within a local network, and a subnet is just a block of addresses within a larger network.

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