Study Notes for The Network+ N10-007 Exam: The Types of IP Addresses

IP ServersYou probably know what an IP address is, but if you need a refresher when studying for the Network+ N10-007 certification exam, it’s basically an identifying number given to a particular computer network or network device.

What you might not be aware of, as CertBlaster and other experts noted, is that there are different kinds of IP addresses. Although IP addresses are composed of numbers or letters and numbers, they’re used for different purposes.

Different Kinds of IP Addresses

In general, IP addresses come in four different types — public IP addresses, private IP addresses, dynamic IP addresses, as well as static IP addresses.

  • A private IP address is used in private networks, such as in-home networks and office networks. It’s mainly used for providing network devices with a way to communicate with the router as well as other devices connected to the private network. It could be assigned by the router automatically or set manually.
  • A public IP address is used for outside or exterior networks and is designated by ISPs or Internet Service Providers. This is the primary IP address that an office or home network use for communicating with other devices on the Internet. It’s primarily used by network devices to communicate with the ISP and in turn, the world outside. This enables them to have direct communication with other devices on the network and access websites.
  • Both public and private IP addresses could be either static or dynamic. This means that respectively, they either could stay the same or be changed. IP addresses that a dynamic host configuration protocol (DHCP) server assigns are dynamic. On the other hand, if a device doesn’t support DHCP or isn’t DHCP enabled, IP addresses are static and should be manually assigned.

IP addresses could either be private or public and dynamic or static. Although private and public indicates the network setup or location, private for inside networks and public for outside networks, dynamic and static is indicative of the permanency of an IP address. This means that a dynamic IP address could be changed, while a static IP address remains the same.