Many networks these days are still using IPv4 and are not yet ready for IPv6 and so in this article I wanted to talk about the necessary steps to start the transition from IPv4 to IPv6 addressing. A while back I wrote a general introduction to IPv6 addressing that you should look at again to get a little bit more background.

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You will need to become familiar with how wildcard masks work in order to properly configure many different Cisco IOS commands. Mostly you will encounter wildcard masks with access control lists and when configuring the dynamic routing protocol OSPF. ACL’s are also used when configuring NAT and PAT settings. Because wildcard masks come up often they are a very important topic to understand for your ICND2 and CCNA Exam.

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I have talked previously about ways to delay the huge problem of running out of unique IPv4 IP Addresses by using CIDR and Subnetting. IPv6 has so far solved the problem by offering way more than enough usable IP Addresses, but getting everything transitioned over to IPv6 will take a long time, so IPv4 is [...]

IPv6 is the latest standard of IP Addresses and is currently in the faze of slowly transitioning out all the IPv4 addresses that are still in use today. IPv6 addresses were mainly created because The Internet was running out of usable IP Addresses to assign out. Every computer or network that is connected to The [...]

Classless Inter-Domain Routing or CIDR for short has helped solve many problems that has helped delay the complete exhaustion of usable IPv4 IP Addresses for Internet use. This delay allowed enough time for IPv6 to be created, but CIDR has far outlived its original lifespan of 3-5 years back in 1992 because IPv4 is still [...]

Now that we have our Cisco router and switch configured it is now time to manually assign the computers an IP Address so that the router knows where each computer is. The best way for me to understand why IP addresses are important and how they work is to think about the postal service. Just [...]

To program a Cisco router we are going to use a Command Line Interface or CLI. Basically what that means is there is no pretty user interface with graphics and buttons, we will just be typing commands. The good thing about using a CLI is that once you get past the initial learning curve you [...]

The best way to learn how to convert and IP Address to binary is to watch someone. So rather then me trying to explain to you in words how to do it… watch this short video! Related Topics: CCNA Study Guide – The fastest way to get Cisco Certified Guaranteed! Learn to Subnet – The [...]

Assigning IP Address to a class is called classful addressing. ARIN – American Registry for Internet Numbers manages the allocation of addresses. There are five different types of classes: Class A: Created to allow very large networks The first octet is used to define the network The first bit has to be: 0 Range: 1 [...]

Every router and computer on the network has to have an IP Address. The best way to understand how IP Addresses work is to think about how the postal service works. Every house has a unique address, a street name and a house number. There can be multiple house numbers on one street, and there [...]