How does the Network work?

Understanding Network Topology

How Does a Modern Network Work?

Whether it's a home, office, farm, hotel or large estate, most networks follow the same basic structure.

Think of your network like a water system:

The internet is the water supply.
The router is the main stopcock.
Switches are the pipework.
Wireless access points are taps around the building.
Devices are the people using the water.

Each component has a specific role.

A Typical Network Layout

Internet
    │
    ▼
Modem / ONT
    │
    ▼
Router / Firewall
    │
    ▼
Network Switch
    │
 ┌──┼───────────┬─────────────┐
 ▼  ▼           ▼             ▼
Wi-Fi AP     Camera       Smart TV
                           Printer
                           Computer

1. Internet Connection

The internet connection enters the property through a service provided by:

Openreach
CityFibre
Virgin Media
Starlink
Mobile Broadband

This is simply the connection between your property and the outside world.

2. Modem or ONT

The modem or ONT converts the provider's signal into a standard network connection.

Examples:

Openreach Fibre → ONT
Virgin Media → Cable Modem
Starlink → Starlink Router/Adapter

The ONT does not manage your network.

Its job is simply to hand over the internet connection.

Think of it as the water meter outside your house.

3. Router / Firewall

The router is the brains of the network.

Its responsibilities include:

✓ Connecting your network to the internet
✓ Providing security and firewall protection
✓ Managing IP addresses
✓ Controlling traffic between devices
✓ Managing VLANs and network segregation

Without a router, devices cannot communicate with the internet.

Examples:

UniFi Dream Machine
DrayTek Router
Firewalla
pfSense
ISP Router

Think of the router as the receptionist controlling who enters and leaves the building.

4. Network Switch

A switch expands the number of available network connections.

For example:

A router may have 4 ports.

A switch may provide:

8 ports
16 ports
24 ports
48 ports

Switches allow multiple devices to communicate simultaneously.

Typical devices connected to switches:

Computers
Cameras
Wi-Fi Access Points
Printers
Smart TVs
Door Access Systems

Think of the switch as a distribution hub.

5. Wireless Access Points

Access Points provide wireless coverage.

Many people mistakenly call these "routers".

A Wi-Fi Access Point:

✓ Provides wireless coverage
✓ Connects wireless devices to the network

A Wi-Fi Access Point does not:

✗ Provide internet by itself
✗ Manage security
✗ Perform routing

Examples:

UniFi U7 Pro
UniFi U7 Outdoor
UniFi U6 Mesh
Aruba Access Points
Cisco Access Points

Think of access points as Wi-Fi transmitters.

6. End Devices

These are the devices that actually use the network.

Examples:

Phones
Tablets
Laptops
Smart TVs
CCTV Cameras
Printers
Gate Controllers
Smart Home Systems

Each device receives an IP address from the router and communicates through the switch and access points.

Example: Viewing a Camera on Your Phone

When viewing a security camera:

Phone
  │
Wi-Fi Access Point
  │
Network Switch
  │
Network Video Recorder

The traffic never needs to leave your property.

The router is not heavily involved because everything is local.

Example: Watching Netflix

Netflix
   │
Internet
   │
ONT
   │
Router
   │
Switch
   │
Wi-Fi Access Point
   │
TV

The router manages the connection between your property and Netflix.

What About Large Properties?

Modern estates often use multiple switches and access points.

Internet
    │
Router
    │
Core Switch
 ┌──┼───────┬─────────┐
 │  │       │         │
 │  │       │         │
AP Switch CCTV Switch Gate Switch
 │          │         │
APs      Cameras    Access Control

This is known as a hierarchical network design.

Benefits:

✓ Better performance
✓ Easier troubleshooting
✓ Greater reliability
✓ Easier expansion

The Automated Integrations Approach

For reliability and future growth, we typically design networks using:

ISP Connection / ONT
Enterprise Router (UniFi Dream Machine)
Core Managed Switch
Dedicated PoE Switching
Multiple Access Points
Structured Cabling
CCTV & Access Control Integration

This ensures every device has a clear path through the network while maintaining security, performance and reliability.

In Simple Terms

A modern network usually follows this path:

Internet
    │
Modem / ONT
    │
Router
    │
Switch
    │
Wi-Fi Access Point
    │
Device

Each component performs a different job, and together they create a fast, secure and reliable network for all devices within the property.