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Routers and Wi-Fi Access Points (APs) are both essential devices in networking, but they serve different purposes. Let’s break down what each one does and how they work together:

Router:

• A router is a networking device that connects different networks — most commonly, your local home or office network to the internet.
• It operates at the network layer (Layer 3) of the OSI model, using IP addresses to route data packets between devices and external networks.
• Routers often have built-in firewalls, NAT (Network Address Translation), and DHCP (Dynamic Host Configuration Protocol) to manage IP addresses for connected devices.
• Many modern routers also include Wi-Fi capabilities, allowing them to function as both a router and a wireless access point.

Wi-Fi Access Point (AP):

• A Wi-Fi access point is a wireless networking device that extends network connectivity by creating a wireless local area network (WLAN).
• It connects to a wired network (like a router or switch) and broadcasts a Wi-Fi signal, enabling wireless devices like laptops, smartphones, and tablets to connect to the network.
• Access points are ideal for expanding Wi-Fi coverage in large areas or eliminating dead zones in homes, offices, and public spaces.
• Advanced APs support features like dual-band (2.4 GHz and 5 GHz), mesh networking, and Power over Ethernet (PoE).

Key Differences:

• Function: Routers manage network traffic and connect networks; APs provide wireless connectivity.
• Routing: Only routers assign IP addresses and direct internet traffic; APs simply bridge devices to the network.
• Connection: Routers often combine wired and wireless functions; APs only extend Wi-Fi coverage.

In a typical home network, a router with built-in Wi-Fi may be enough. For larger spaces or businesses, you might use a separate router for network management and multiple APs for broad, stable wireless coverage.