| Explanation & Hint:
In a typical three-tier network design, the functionalities would be distributed across the access, distribution, and core layers as follows:
Access Layer:
- Provides network access to the user.
- Implements personal firewalls on the client computers (though this is more of a client-side security feature, it can be enforced at the access layer).
- Implements network access policy.
Distribution Layer:
- Establishes Layer 3 routing boundaries.
- Functions as an aggregator for all the campus blocks.
- Represents the network edge.
Core Layer:
- Provides high-speed backbone connectivity.
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