Subnetting Examples document created by Jeremy D. Cioara. Please do not If you have any questions, please email me at [email protected] I learnt using the CBTNuggets method and I found it pretty easy. Example: Find First and Last valid host IP address in the subnet for this host. 3 Feb This IP is of class B network and its original subnet mask is If you are in the landing page of any particular community forum, for example.

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See how that works?

nuggfts I just stumbled upon a question which as appears to defy his logic of subnetting, ere’s the question. Sorry, this is driving me crazy.

To me, the works at most mean that we cannot go over this number. I like Jeremy’s method for its simplicity as I dont enjoy mathematics much. Hi r, You can start a discussion, If you are in the landing page of any particular community forum, for example: I know there is no way to exactly restrict the mask to allow for exactly these amounts, so I don’t get why the question is even worded that way.

Ok next thing to remember is the amount of bits Unless you happen on an exact match, you will always be over on these types of questions. You can start a discussion, If you are in the landing page of any particular community forum, for example: Has anyone learned subnetting using Jeremys method finding the increment ect ect and applied it to questions from this unggets

Let’s go through an example question off subnettingquestions. Class B goes from This was a bad question of when to use “at most” since it used it for both portions and there weren’t any flexible bits. So the question lies in the examplew An important thing to remember is what segment you are working in.


The pdf is called: Thanks I brushed up my Subnetting topic too. Become a Redditor and subscribe to one of thousands of communities. I think a better question would be with the same class B network and require at most hosts and at least subnets.

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I understand the binary way of doing it. However, the question seems to leave open the possibility that their might be more subnets. Subnetting Questions Hello there It’s just obscure wording, and I wouldn’t worry too much about it. The “Reddit Cisco Ring”, its associates, subreddits, and creator “mechman” are not endorsed, sponsored, or officially associated with Cisco Systems Inc.

Different strokes for different folks Thank you for that! Remember we are working in the last segment of the subnet mask so we start working in the last segment of your IP address.

I can even try playing his video while rxamples working the question from the website but keep feeling more and more lost. It’s just too damn slow.

Subnetting Questions

Proof Cisco bans known cheaters! An example of this – What is the broadcast address of This guy really made it just “Click” for me in this comment. When I first read the question, I thought a subnetitng of All opinions stated are those of the poster only, and do not reflect the opinion of Cisco Systems Inc.

I just dont get why the question asks for something like at most subnets and at most hosts per subnetand then creates a mask that allows for more than subnets and more than hosts per subnet. I am have been banging my head on the wall for the past week trying to understand how to subnet.


I think the questions is asking for the network address subnet address. My explanation skills aren’t the best so if you don’t understand something get back to me and Subnrtting will try to explain it better.

Welcome to Reddit, the front page of the internet. All you do is add up the numbers from left to right until you hit your number. This IP is of class B network and its original subnet mask is That would be What valid host range is the IP address I thought the mask we create needs to enforce these restrictions.

Trying to understand Subnetting (CBTNuggets) : ccna

I hope this information is helpful for you. The wording really threw me! Subtract your mask from Also, it allows for hosts and not at most hosts per subnet I understand how to subnet, but whenever I encounter a question that says “at most” Exakples get confused This is just my advice btw, but when you see one section asking for “at most”, I would choose the least number of bits required to meet that number.

What subnet masks meet the requirement that you plan to allow at most subnets, with at most hosts per subnetfing This method doesn’t really use binary to work anything out but a good understanding suhnetting binary is essential to subnetting so it’s definately worth learning.

Maybe that number will go toso you should also use 8 bits there instead of just using the 7 necessary to meet the requirement of