You four, but keep in mind that IP is in binary, not decimal. I know I said there are 8 numbers and I only showed
Octet = An octet is simply a group of 8 numbers. Here are a few simple definitions to help
Whenever the word binary comes up, many people immediately become concerned. TCP/IP Address Construct Watch a Video on this TopicĪ TCP/IP address is a 32 bit, binary number that has been converted to decimal. The takeaway from this first lesson is the router in your home or business, simply does not know where every possible destination IP address is located. Of course, this is only a loose analogy and the IP addresses used to describe the process could have been anything. Destination Town: Ok, this letter is addressed to 191.54.x.x, I know where that is so I'm going to send this letter directly to the end recipient.Hub Post Office: This letter is addressed to 191.54.x.x, those addresses are serviced by the post office in the destination town.Therefore, I'm going to send it to the "hub" post office (in IP terms this is basically what a default route does). Your Town Post Office (ISP): I don't know anything about 191.55.x.x, I only know 191.54.x.x.The communication process would look something like this: In this scenario, your mail carrier would take the letter to your local post office, it would then be sent to a hub within your state, then the destination town's post office, then finally to the end recipient. The process is basically the same, but it will include more "hops". Now, suppose your letter was addressed to a different town in your state, let's say 191. Your local router would simply forward your request to the Post Office that knows You wanted to send your letter to 191.54. Post office would route the letter to the building next-door. Your mail carrier would take the letter to the post office in your town, and the What happens if you want to send it to the building next-door? To mail a letter within your own apartment building (subnet), a router/post office is not required. We will get into the subnet masks later, for now let's assume there are 30 apartments in your building and the building next-door also has 30 apartments. The concept of a subnet mask, is what tells the mail carrier which addresses are within a given network.Īs our analogy stands right now, we don't know how many apartments are in your building. 16, the letter would never leave your building. 15 and you mailed your letter to 191.54.38. Intra-Subnet = The postal carrier (switch), would know that the destination address is local and would send it directly to the recipient.įor example, if you were on IP 191.54.38. If the letter was being mailed to someone in your own building, the router or postal carrier (switch) would know that it does not have to leave the building (your subnet) and would send it directly. If you put the outgoing letter by your mail box, a few things would happen based on the destination postal address (IP Address). IP address, your router will decide what to do with that message. If you were going to send a letter (or in this case email) to another To further this analogy, think of a router as a If you have a router in your house, or a router in your business. To have TCP/IP, at some point, you must have a router. The right, the geographic area continuously becomes more and more specific. In our analogy,Įach set of numbers may represent a geographic area. Think of an IPĪddress as your postal address. Here is kind of a loose analogy that should make this very clear. The first thing we need to look at is - What is an IP address? How does it work? TCP/IP Subnetting Very Basic Watch a Video on this Topic
The remainder of your study time much more productive. In other words, you would get 100% on 40% of the exam. When you learn to subnet, you should expect to ace To put this is real life terms, suppose the CCNA exam has 50 questions and you are givenĪround 20 subnetting questions. With this tutorial, these questions will be no harder than simple addition or subtraction. For example, some haveĮstimated that the CCNA exam has around 40% subnetting questions. Will give you a major advantage when you sit for the exam. In addition, the mastery of these concepts Solve subnet based questions is apparent. Questions, it will help you increase your speed and master TCP/IP concepts.įor many entry-level to intermediate computer networking exams, the need to quickly In addition, the methods you will learn here will allow you to not only solve subnetting You everything you need to know to pass any exam that requires TCP/IP knowledge.
0 kommentar(er)
