Can any one provide me the network classification i.e Different Tier of network that can clear me the what are the req of every tier.
>> I heard : Network Tier 1 , Network Tier 2 & Network Tier 3
this refers to ISP classification in the internet
Tier 1 ISP are the oldest and big ones that do not import full BGP tables by other ones
A tier2 provider has one or more Tier1 upstream providers and multiple peering sessions with other Tier2 providers.
A tier3 provider is a customer of multiple Tier2 and or Tier1 providers
The classification is old as some ISPs classified as Tier2 are not so "distant" from tier1
in attachment a document of William B. Norton about peering
Hope to help