7. Hierarchical layer model:
1.
Core layer: Designed for high
availability and redundancy. Core
layer is the high-speed switching
backbone of any network. The core
layer has the following
characteristics:
i.
High reliability
ii.
Adapt to changes quickly
iii.
Lower latency
2.
Distribution layer: Address
summarization and media translation
are applied in the distribution
layer. Distribution layer lies in
between the Core layer and Access
layer. It usually addresses
the following:
i.
Security
ii.
Access Control Lists
iii.
Route Summarization
iv.
Media translation
3.
Access layer: The access
layer consists of the remote office
sites using ISDN, Frame Relay etc.
Local area networks segments are
also part of the access layer.
