What is a Router?
A router connects your local network to the internet. Learn how routers work, how they assign IP addresses, the difference between a router and modem, and how to access your router's admin panel.
A router is the device at the centre of your home network. The router takes the internet connection coming into your home and distributes it to every phone, laptop, tablet, TV, and smart device you own. If the modem is the front door, the router is the hallway that connects every room.
Every time you browse the web, stream a video, or send a message, the data passes through your router. The router decides where each packet goes, keeps your devices organised with IP addresses, and stands as the first line of defence between your network and the internet.
What a Router Actually Does
A router performs four core jobs, all simultaneously, all the time.
Routing traffic. This is the job a router is named after. When your phone sends a request to load Instagram, the router receives it and forwards it toward the internet. When the response comes back, the router sends it to your phone, not your laptop, not your TV. The router keeps track of which device asked for what using a process called NAT (Network Address Translation).
Assigning IP addresses. Every device on your network needs a unique IP address to communicate. Your router runs a DHCP server that automatically hands out addresses from a pool (say, 192.168.1.100 through 192.168.1.254). This is why you can connect a new device to the router’s Wi-Fi and it works immediately.
Providing Wi-Fi. Modern routers have built-in wireless radios that broadcast one or more Wi-Fi networks. Most current routers broadcast on both the 2.4 GHz band (longer range, slower speeds) and the 5 GHz band (shorter range, faster speeds). Wi-Fi 6 and Wi-Fi 7 routers add efficiency improvements that help in crowded environments.
Acting as a firewall. Your router is the default gateway, the only path between your local network and the internet. By default, the router blocks unsolicited incoming connections. Someone on the internet cannot connect to your laptop unless you explicitly allow it through port forwarding. This basic router firewall protects every device on your network.
Types of Routers
Not all routers are the same. The type of router you have depends on your ISP, your budget, and your home layout.
Standalone routers are dedicated routing devices. You connect a standalone router to a separate modem via Ethernet. Brands like TP-Link, ASUS, Netgear, and Linksys make standalone routers at every price point. These routers typically offer the best performance and most configuration options.
Modem-router combos (also called gateways) combine the modem and router into a single box. ISPs love these because they simplify setup and support. The downside is that you are stuck with one device doing two jobs, and the router portion is often weaker than a dedicated unit. See our modem vs router comparison for details on when a combo makes sense.
Mesh router systems use multiple units placed around your home to create a single, seamless Wi-Fi network. Instead of one router struggling to cover a large house, two or three mesh nodes work together to eliminate dead zones. Systems from brands like TP-Link Deco, ASUS ZenWiFi, and Netgear Orbi have made mesh routers mainstream.
Enterprise and business routers are rack-mounted devices with advanced features like VLAN support, VPN servers, multiple WAN connections, and detailed traffic management. These routers are overkill for homes but standard in offices and data centres.
The Router Admin Panel
Every router has a built-in web interface (a small website hosted on the router itself) where you manage its settings. You access the router admin panel by typing the router’s IP address into a browser.
The most common router addresses are:
- 192.168.1.1: TP-Link, ASUS, Netgear, Linksys
- 192.168.0.1: D-Link, Netgear, some TP-Link models
- 10.0.0.1: Xfinity, some AT&T gateways
The router login page asks for a username and password. Factory defaults are printed on a sticker on the router (commonly admin/admin). If you have changed the password and forgotten it, a factory reset (usually a pinhole button held for 10 seconds) restores the defaults.
From the router admin panel, you can:
- Change your Wi-Fi network name (SSID) and password
- View all connected devices
- Set up port forwarding for game servers or remote access
- Update the router firmware
- Configure parental controls and access schedules
- Change the router’s IP address and DHCP range
- Set up a guest Wi-Fi network
For a step-by-step walkthrough, see our router login guide.
Router vs Modem vs Gateway
These three terms come up constantly. A router, modem, and gateway each mean something different.
A modem (modulator-demodulator) connects to your ISP’s infrastructure. For cable internet, it connects to the coaxial cable. For fibre, it connects to the optical terminal. For DSL, it connects to the phone line. Its only job is converting the ISP’s signal into standard Ethernet data.
A router takes that Ethernet connection and shares it with multiple devices. The router creates your local network, assigns IP addresses, manages traffic, and provides Wi-Fi.
A gateway is an ISP-provided device that combines both functions into one box. Technically, “gateway” also means “default gateway,” the IP address your devices use to reach the router. Context matters.
In a typical setup with separate devices, the data flow looks like this:
ISP signal → Modem (converts signal to Ethernet) → Router (distributes to devices) → Your devices
With a combo gateway:
ISP signal → Modem-Router Gateway (does both) → Your devices
Both setups work. Separate devices give you more control and typically better router performance. Combo gateways are simpler and take up less space.
When to Replace or Upgrade Your Router
Routers do not last forever. The router hardware degrades, and more importantly, the Wi-Fi standards and security protocols evolve.
Signs you need a new router:
- Frequent disconnections or need to restart the router regularly
- Slow speeds even when your internet plan is fast
- Dead zones in areas of your home that should have coverage
- The router does not support WPA3 encryption
- It uses Wi-Fi 4 (802.11n) or older, and Wi-Fi 5 (802.11ac) is the minimum you want today
- The router manufacturer has stopped releasing firmware updates
A good router should last 4-5 years. Budget around the same amount you would for any other essential appliance. Spending more gets you better router range, faster speeds for multiple simultaneous users, and longer software support.
Setting Up a New Router
The basic router setup process is the same regardless of brand:
- Connect the router’s WAN port to your modem (or to the wall outlet if your ISP does not use a separate modem) using an Ethernet cable.
- Power on the router and wait for it to boot (usually 1-2 minutes).
- Connect a device to the router’s default Wi-Fi network (the name and password are on the sticker).
- Open a browser and go to the router’s setup page (192.168.1.1 or whatever the default is).
- Follow the setup wizard to configure your Wi-Fi name, password, and basic settings.
- Update the router firmware immediately, as routers often ship with outdated software.
Change the default admin password during router setup. Leaving it as “admin/admin” is a significant security risk, especially if remote management is enabled.
Frequently Asked Questions
What is the difference between a router and a modem?
A modem connects to your ISP's infrastructure and converts their signal (cable, fibre, DSL) into Ethernet data your devices can use. A router takes that single internet connection and distributes it to multiple devices via Wi-Fi and Ethernet, assigning each one an IP address. Many ISPs provide a combined modem-router in one box.
How do I access my router settings?
Open a web browser and type your router's IP address (usually 192.168.1.1 or 192.168.0.1) in the address bar. Log in with your admin credentials (often printed on a sticker on the router). From the admin panel, you can change Wi-Fi passwords, set up port forwarding, update firmware, and manage connected devices.
Why do I need to restart my router?
Restarting a router clears its memory, resets its internal processes, and forces it to re-establish the connection with your ISP. This often resolves slow speeds, dropped connections, and devices failing to connect. It is the single most effective troubleshooting step for home network issues.
How many devices can a router handle?
Most consumer routers support 20-50 simultaneous devices, though premium models and mesh systems can handle over 100. The limiting factors are the router's processor, RAM, and wireless bandwidth, not a hard device cap. Performance degrades as more devices compete for bandwidth.
Should I use my ISP's router or buy my own?
ISP-provided routers are convenient but often have lower performance, fewer features, and firmware you cannot control. Buying your own router typically gives you better Wi-Fi range, faster speeds, more security options, and no monthly rental fees. Check that your ISP allows third-party equipment first.