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TCP/IP Configuration (part 7) In this lesson for TCP/IP we cover another reserve address range, APIPA. Its range is 169.254.0.0 where the .0 represents an unknown value. This is the address returned when for whatever reason network connectivity has failed and the host system cannot be assign an appropriately classed IP address. We'll examine some possible causes that trigger the assignment this event and identify how you can troubleshoot to resolve. We also define and examine differences between Static and Dynamic IP address, and the advantages/disadvantages of each and then we'll explore how Subnetting works within these IP address types. For example, we start with Static IP addresses which are IPs we assign ourselves. You'll learn why that would necessary and how to they would be used, and how to configure the subnet mask structure of a Static IP.