Subnetting in Net+
First off, hello! long time lurker, first time posting (finally)
I did a little searching to see if I can find any information on what type of subnettng questions were asked on h Net+ exam, but I couldn't find anything with detail. Im basically trying to see as to how in depth they do go into? Can I expect to see questions like find the first address and Bcast address of 192.168.45.177/28 ? Or more detailed?
I am currently done with ICND1 classes and wrapping up ICND2. I was going to continue to study and cram for a month before attempting to test, so I figured I may just knock out Net+ while I am doing that as something to break up the time and monotony of studying. I feel like I have a very solid subnetting base since I can do it in my head and was wondering if I should focus more on my cabling and other things that are not really covered in ICND1, or should I mix in some more subnetting.
Thanks for the time!
I did a little searching to see if I can find any information on what type of subnettng questions were asked on h Net+ exam, but I couldn't find anything with detail. Im basically trying to see as to how in depth they do go into? Can I expect to see questions like find the first address and Bcast address of 192.168.45.177/28 ? Or more detailed?
I am currently done with ICND1 classes and wrapping up ICND2. I was going to continue to study and cram for a month before attempting to test, so I figured I may just knock out Net+ while I am doing that as something to break up the time and monotony of studying. I feel like I have a very solid subnetting base since I can do it in my head and was wondering if I should focus more on my cabling and other things that are not really covered in ICND1, or should I mix in some more subnetting.
Thanks for the time!
Comments
subnetting.net will get you prepared very well. Put aside 5-10 minutes daily and run through as many problems as you can.
/25 /26 /27 /28 /29 /30 You must have at least two hosts. I can not tell you how many times that i have written this down as I am studying for the exam myself.. once you have written this down sooooo many times you will just look at it and be like OK a /26 is 192 a /29 is 248 a /28 is 240. Just write it over and over till you get it.....
a rule well im no expert but a rule that i call it is when you see a /23 or something like is to remember which octet your working with so you know off the top of your head its at least a /16 already so you have to add the remaining so .255.255 128 64 32 16 8 4 2 1
17 18 19 20 21 22 23 = 254
But remember its in the 3rd octet so look at your ip address at the third octet..... their is two ways of doing this one i was doing and its the long way.. is to take your number in this case 254 and subtract it by 256 so 256-254 is "2" OK that is a long way doing it... the easy way of doing it is this look at where you stopped... the /23 stops at what number 2 you will always count by this number until you pass the number in the octet's place in this case you will count by 2 until you pass the 8.8.8<
.8 so in this example we would do 2-3
4-5
6-7
8-9
10-9
i should have chose a different number now im thinking lol..... a /23 with a 8 in the address is a bit tricky.. hmmmmm
Someone please correct me if im wrong but im thinking that with my messed up example here this would be a 8.8.7.0 address
anyway... I probably gave you a real messed up example their sooo my original post was going to be this
IP Subnet Practice
you can practice here you will most definitely get it after a couple of tries and a lot of writing
yea I was wrong... I used this to confirm.. Subnet calculator
just type in your example and it will tell you.. so my guessing of 8.8.7.0 is wrong its suppose to be 8.8.8.0..
2^x (the number of bits taken by cidr) = number of subnets
2^(y-2) (8-x) = number of hosts