What are the 3 public IP address ranges?

What are the 5 IP address classes range?

IPv4 is a 32-bit number.

Therefore, the address space available is 232 or 4 billion unique addresses.

What is the differentiating factor between Class A and Class B networks? A Class B network is based on a /16 prefix, and would therefore have a top address of 1023. A Class C network is based on a /24 prefix, and would therefore have a top address of 1023. A Class A network is based on a /16 prefix, and would therefore have a top address of 1023. What is the difference between /24 and /25 addresses? /24 and /25 are essentially identical. The only difference is that one is based on a /24 prefix and the other is based on a /25 prefix. Both would have a top address of 1023.

What is the difference between /12 and /13 addresses? This is also very simple. /12 and /13 would both have a top address of 1023, because it is based on a /24 prefix and a /13 prefix respectively.

What is the maximum number of computers you can have on a given IP address? On a Class A network, there is only a single Class A address range to choose from. On a Class B network, there are 3 distinct Class B addresses to choose from. On a Class C network, there are 256 distinct Class C addresses to choose from. On a Class D network, there are up to 65536 Class D addresses to choose from. When you try to add a second computer, what does your DHCP server tell you? DHCP servers will give out two classes of IP addresses. The first one will be for the first IP address the server chooses and the second one will be for the second IP address the server chooses. These two addresses will never overlap in the address space.

What happens if I have 2 DHCP servers running in my network? Since the first computer gets an address from the first DHCP server, that server has to be the one that gets a lease on that computer's IP address.

What are the four types of IP addresses?

The internet is based on a group of computers, connected to each other by means of routers.

Each router has an address which is either an IP address or a CIDR block, where it is the gateway to a network that can be directly accessed through the router. IP addresses are used for all sorts of things, but here we will only talk about the basics:

IP addresses, or domain addresses as they're also called, have a function: they determine where on the network (or internet) a packet should go to next. They're used for routing packets on the internet, for example when they say that a specific server should receive the packet sent to its IP address. If you're interested in reading about the protocol that the internet is built on, RFC 791 (the IP protocol) is a good source of information.

IP addresses have three parts: Network - usually the network is associated with a router and so is the IP address, but not always (an IP address can refer to multiple networks or subnets). HOST - The machine running the software (web server, mail server, etc. Most IP addresses on the internet have a host name attached to them so that DNS can resolve them. For an IP address to be usable, it needs a hostname to resolve to it

IP address - a number, written in dotted quad notation. The address ranges are given in a 'Classless Inter-Domain Routing' form (CIDR) which is explained below.

Each IP address consists of three parts: Network address - which in most cases will be the network in question and so won't vary. Host address - the machine/server that we want to refer to using the IP address. Subnet mask - this will tell us where the network goes in relation to other networks (it will let us identify which network the address belongs to). A subnet mask doesn't really matter to the internet, because all packets reach the proper destination, and no other routers need to understand it. But since it's a necessary part of the network stack for people who are writing the software that runs on the internet, it's important to know how they work.

What are the 3 public IP address ranges?

I'm really trying to understand the 3 distinct IP Address ranges we should assume our company will get assigned: 168.

0 and 172.0

The first number is the address of your subnet. All servers reside on this subnet (and they share the same IP address).

The last three digits are typically used as a host ID or similar internal number that determines where the traffic is routed. This number is only usable internally and must not be routable to anything outside of our organisation.10 will be the primary NIC for all of our internal WAN traffic. 192.11 is your "server" NIC which serves as your "DMZ"/External-firewall facing NIC, as well as the primary firewall facing NIC.12 is your DMZ router/web-facing interface (we can host our web servers here)

13 is any of the internal-facing NICs on these servers, as well as anything acting as an Active Directory server. And to address the concern above about the use of 172.16 as part of a public IP address range. The reason I mention that it isn't a public facing IP is because it could be allocated to you regardless of whether you want it or not. If for example, we're using cloud services for infrastructure we would then have the option to move away from the cloud provider at any time. We would then have to manually allocate each one of those IP's via Azure portal. What could happen is this would result in a loss of data from an Azure-provided server (a scenario common with many Cloud services at least in my opinion). A lot of our resources are currently in Azure Public cloud.

So the use of this range will allow us to simply reserve the 172.16 network, but if at any point we need to move them away from Azure it's done without any disruption and costs.

So to answer your question: A small, mid or large business can easily use the ranges below as appropriate, no problems there.