Which statement is true concerning the core layer within the hierarchical design model?
- Remote users are granted access to the network through the core.
- Routing should be configured without traffic filtering, address translation, or other packet manipulation at the core.
- The core, which acts as the front door to a network, is designed to prevent unauthorized users from gaining entry.
- The core provides an optimized and reliable transport structure by using a combination of route summaries, distribution lists, and route maps.
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