Using NAT for IPv4 in Your WLAN

• To allow hosts on the LAN to communicate with the outside world, the router will use a process called Network Address Translation (NAT)
• NAT translates a private (local) source IPv4 address to a public (global) address (the process is reversed for incoming packets)
• NAT makes sharing one public IPv4 address possible by tracking the source port numbers for every session established by a device

Typically, the wireless router is assigned a publicly routable address by the ISP and uses a private network address for addressing on the LAN

If your ISP has IPv6 enabled, you will see a unique IPv6 address for each device