Special Reserved IP Addresses

• Private networks - unroutable from the public Internet, routable within the private space, typically used with NATs

• • 10.0.0.0/8
  • 172.16/12
  • 192.168/16

• Autoconfiguration/linklocal

• • unroutable off of the local link
  • 169.254/16 minus the top and bottom class C

• Loopback - unassigned, used for testing on hosts

• • 127/8

• Class D addresses

• • Used for local or wide area multicasting
  • Hosts “subscribe” to a multicast service by requesting traffic that it being sent to a particular class D address