Difference between router, repeater, access point

In order to have wireless internet in the home, three main jobs need to be taken care of:

• The home needs a connection to the Internet. This job is performed by a modem.
• Multiple computers and devices must be able to share the same internet connection. This job is performed by a router.
• Computers and devices must be able to connect wirelessly to this shared connection. This job is performed by one or more wireless access points.

While these are three separate functions, they are often performed by the same device, frequently referred to as a “home central”, IAD (integrated access device) or similar by your ISP. It can also be split between two devices — one modem and one router with a built-in wireless access point, or each function may have its own dedicated device.

What is a Wireless Access Point?

A wireless access point or hotspot consists of one or more wireless radios. All recent access points have at least two radios that transmit on separate frequency bands – 5 GHz and 2.4 GHz.

From these radios one or more Wi-Fi networks can be created. Each of these networks has an SSID or wireless network name.

In order to provide access to the internet, the access point must either be connected to a router or be a part of the router.

The three most common types of home access points are:

• Wireless routers (or all-in-one devices for internet access)
• Wi-Fi repeaters
• Stand-alone access points making up a mesh network

What is a Wireless Router?

The router’s primary responsibility is to direct (route) data to the correct receiver. Almost all routers currently have wireless capability built-in, but this does not actually have anything to do with the “router” part.

Traditionally, it was assumed that a single wireless router, and therefore one access point, would provide a good enough wireless network for most homes.

Gradually, it has become apparent that the task at hand is usually too big:

• The more popular Wi-Fi has become, the more traffic and interference can be seen on the 2.4 GHz frequency band.
• Usage of the 5 GHz band has increased dramatically. Here, there are far fewer problems with interference, but the signal range is also significantly shorter.

It is not doable for a single wireless router alone to penetrate the interference and obstacles in homes that have many rooms or concrete walls, floor heating, and so on.

Therefore, poor coverage is a widespread problem, and the use of Wi-Fi repeaters and mesh networks is increasing.

What is a Wi-Fi repeater?

A Wi-Fi repeater, extender, or booster is a device that forwards wireless signals from the router to cover a larger area, such as multiple floors of a house.

The repeater creates a new network based on signals from the originating network, and the clients that connect to the repeater are thus on a separate network. If you have more than one repeater, each repeater adds its own network.

A repeater does not have router or modem functionality, nor can it function as a standalone wireless access point; it relies on getting wireless signals from another access point that it can pass on (repeat).

Wi-Fi repeaters comes in many models and configurations – we strongly discourage the use of repeaters because the vast majority of them are cumbersome to use, and because they use capacity (airtime) from the wireless router.

In many cases, the Wi-Fi repeater can do more to boost the problems than the signals. But what should you do to get the whole home covered when the router isn’t enough?

What Is a Mesh Network?

A mesh network is a wireless network made up of multiple access points that distribute wireless signals throughout the home and balance the traffic load between themselves.

The user connects with a single SSID and password and the mesh network determines which access point will provide the best coverage for which clients at any given time.

Most enterprise and other professional Wi-Fi solutions are based on mesh technology, but it is also becoming increasingly common in the home.

Mesh access points are not repeaters, and they usually do not contain router or modem functionality; they are dedicated and specialized wireless devices. A mesh network can be made up exclusively of such dedicated access points, or the router’s built-in access point can be included as a node in the mesh network; this will vary between the different solutions.