Planning a building network

## Example: a 3-floor school The school has 3 floors. Each floor has 2 classrooms, and each classroom has 15 computers. There is also a teachers' room and a server room. ### 1. Topology — tree ``` Internet │ [Router] │ [Core switch — server room]──[Server] / | \ [Floor 1 SW] [Floor 2 SW] [Floor 3 SW] / \ ... ... class1 class2 ``` ### 2. IP plan — each floor gets its own network | Part | Network | Gateway | Hosts | |---|---|---|---| | Floor 1 | 192.168.10.0/26 | 192.168.10.1 | up to 62 | | Floor 2 | 192.168.10.64/26 | 192.168.10.65 | up to 62 | | Floor 3 | 192.168.10.128/26 | 192.168.10.129 | up to 62 | | Servers | 192.168.10.192/26 | 192.168.10.193 | up to 62 | With 30 computers per floor, /26 (62 hosts) is enough and leaves room to grow. ### 3. Cables and requirements - UTP Cat6 cable from every room to the floor switch (no longer than 100 m!). - Number and label every cable on the **patch panel**. - Put an uninterruptible power supply (UPS) in the server room. > 🎮 **Network lab → Tasks 9, 10**: build a school or office network yourself! > > 🧮 Problems: **Networks → Level 10**