We've known the National Broadband Network (NBN) plans to be structured around five "tiers" of connectivity based on download and upload speeds offered by NBN Co. Now it appears the company has renamed the plans and taken one of the tiers out.

We've previously published quite a few articles about plans that are available over the NBN and how to pick the right one for you if the network is available in your area. Up until late last year, here's how NBN Co classified the plans available over its fibre network:

NBN Co's new speed categories for 'super-fast broadband' are nbn 25, nbn 50 and nbn 100.

Tier 1: This speed tier provides your service provider with wholesale access speeds of 12Mbps download and 1 Mbps upload over NBN fibre.

This speed tier provides your service provider with wholesale access speeds of 12Mbps download and 1 Mbps upload over NBN fibre. Tier 2: This speed tier provides your service provider with wholesale access speeds of 25 Mbps download and 5 Mbps upload over NBN fibre.

This speed tier provides your service provider with wholesale access speeds of 25 Mbps download and 5 Mbps upload over NBN fibre. Tier 3: This speed tier provides your service provider with wholesale access speeds of 25 Mbps download and 10 Mbps upload over NBN fibre.

This speed tier provides your service provider with wholesale access speeds of 25 Mbps download and 10 Mbps upload over NBN fibre. Tier 4: This speed tier provides your service provider with wholesale access speeds of 50 Mbps download and 20 Mbps upload over NBN fibre.

This speed tier provides your service provider with wholesale access speeds of 50 Mbps download and 20 Mbps upload over NBN fibre. Tier 5: This speed tier provides your service provider with wholesale access speeds of 100 Mbps download and 40 Mbps upload over NBN fibre.

On a side note, it's important to remember that Tier 5 services aren't available across the network. NBN Co operates as a wholesaler of NBN services and there are around 70 registered internet service providers (ISPs) offering plans to consumers.