Local network and internet
A local network may connect devices inside a home, shop, office, or school. The internet connects many networks together through service providers, routing systems, and global infrastructure.
Common network parts
| Part | Role | Simple explanation |
|---|---|---|
| Device | Sends or receives data | Phone, laptop, POS terminal, camera |
| Switch | Connects local wired devices | Moves data inside a local network |
| Router | Connects networks | Helps traffic move between local network and internet |
| Access point | Provides WiFi | Lets wireless devices connect |
| Server | Provides services | Website, database, email, files |
| DNS | Translates names to addresses | Turns a domain name into a reachable network address |
What happens when you open a website
Your device asks DNS where the website is, connects to the server, requests content, receives data packets, and the browser assembles the page you see.
Latency and bandwidth
Bandwidth describes how much data can move over time. Latency describes how long a response takes to begin. A connection can have high bandwidth but still feel slow if latency is high.
Open networks, weak passwords, outdated routers, and poor access controls can expose devices and data.
This article is written for education, maintenance, design, and safe technology use. Security topics are explained from a defensive point of view only.
Do not use computer knowledge to access systems without permission, damage data, bypass protections, or invade privacy.
Networking questions
No. WiFi connects your device to a local wireless network. The internet connection comes through a service provider and routing equipment.