2 tier: core and access. distribution functionality is split between the two.
3 tier: core, access & distribution.
the best depends on all sorts of things, size, age/functionality of hardware.....no simple answer.
I think you need to revisit your post on 3 tier vs 2 tier.
2 Tier architecture is Access and distribution layer as the core is collapsed into the distribution layer. Not many companies can afford the Core infrastructure so its collapsed into the distribution layer.
Yes, you are right, guess that was wrong choice of word/analysis.
My issue was actually with this "2 tier: core and access. distribution functionality is split between the two."
I thought core functionalities are collapsed into distribution so we have
tier 2 as just the access and distribution functionalities and not the other way round as its been put above
core and access???.