Generally, in today’s world of technology we know that the 169.254.xx.xx is a junk IP on a client device which fails to attain an IP address , but what we do not understand is how and why this happens and what is the terminology used to describe this. Today, I’m talking about this Automatic Private IP Addressing or APIPA as it is commonly called. APIPA is a term used for auto assigning of the IP address to the LAN and WLAN interface on a Windows Operating System when it can’t reach the DHCP server. It is important to understand that in order for any device to be a part of the network, it needs an IP address and when this is not possible, the APIPA allows the LAN or WLAN interface to assign itself a unique IP address. As seen above, Network connection 1 indicates a normal working setup wherein the DHCP server is Enabled on the router and all the client devices acquire IP addresses in the range 192.168.0.xx (xx ranges from 2 till 254) with the default