Subnetting - Help! [Archive] - TBCS Community Forums

simon275

09-20-2007, 04:50 AM

Is there any one out there who understands sub netting and would be willing to explain it to me by 02:00GMT? As I have spent all day and I just plain don't understand it. I can do binary maths but I just cant see how to do this.

An example of a question is

Given the host address of 152.202.34.4 and a subnet mask of 255.555.254.0, find the broadcast address and the subnetwork address of the subnet the host belongs to.

rep for who ever helps

simon275

09-20-2007, 05:03 AM

Ok so I manged to work out the answer.

Subnet 152.202.34.0
Broadcast 152.202.35.25

I believe this is right. Doing the and function on paper takes a long time. Is there a quick way?

SgtM

09-20-2007, 06:06 AM

Subnet is right.. broadcast would be 152.202.35.255
You're using 23 bits to subnet a Class B address. So, your last octet will always be .0 for the subnet, and the broadcast will be .255. Can't work it out on paper, but I'll see if I have time later today to work it out and scan it for you.

There is a much easier way. ;)
http://i47.photobucket.com/albums/f186/sgtm_usmc/subnet.jpg

Crazy Buddhist

09-20-2007, 06:38 AM

Is there any one out there who understands sub netting and would be willing to explain it to me by 02:00GMT? As I have spent all day and I just plain don't understand it. I can do binary maths but I just cant see how to do this.

An example of a question is

rep for who ever helps

Here is a really easy way to do it (http://www.subnet-calculator.com/)

If you want to understand it here's a good guide (http://compnetworking.about.com/od/workingwithipaddresses/l/aa043000b.htm)

simon275

09-21-2007, 09:49 AM

Thanks guys. I did the test today and it went well.

+reps

SgtM

09-21-2007, 10:52 AM

Thanks guys. I did the test today and it went well.

+reps

Cool man. Let us know how you scored. If you ever need more networking help, let me know. I'm Network+ certified, and working on my CCNA.

simon275

09-22-2007, 10:30 PM

Will do.

I doing a networking major starting next year at university and it runs for two years and it includes all the teaching and help we need so I can sit my for my CCNA's at the end of that time.