Day 1 | Interview Series | LAN WAN Architecture| скачать в хорошем качестве

Day 1 | Interview Series | LAN WAN Architecture|

Most network engineers use 3-tier architecture… but struggle to explain it in interviews. Access layer connects devices — PCs, phones, APs. It’s about connectivity. Distribution layer is the brain. This is where routing, filtering, policies, and control decisions happen. Core layer? Pure speed. It should just move packets fast and stay stable — no heavy processing. Architecture is about where decisions are made, not just how many switches you have. If your core switch is doing filtering or complex policies, the design is already wrong. Three-tier design reduces failure domains and keeps the network scalable. This exact question — with interview-level logic — is explained step-by-step in today’s LAN Architecture video in the Interview Series. [CCNA training, Interview questions, Networking questions, CCNP training, CCNP classes, cisco certifications, ccie training]