subnetting IP addresses part 3

How to subnet. It's amazing the number of network guys that I meet that never understand IP Addresses. I've had to explain it so many times, that I've pretty much got a routine down. I'm to the point now that it becomes hard to explain this stuff to others.

Providing training videos since last Tuesday.
http://technoblogical.com
Thanks for watching.

Category:

Science & Technology

Tags:

• subnetting
• networks
• ip
• address
• subnet
• mask
• binary
• training

[munsayac13]

How did you come up with subnet mask of 255.240.0.0 while the default subnet mask is 255.255.0.0 for CLASS B subnet mask ranging 128-191?

[technoblogical]

@munsayac13 You are referring to classful networks. When Classless Inter-Domain Routing (CIDR) was introduced, those classful assignments went right out the window. It's important to know those classes for historical sake. But we don't really follow them. A great example is the Class C range of private addresses which is 192.168.0.0/16

[INV3NT1T]

172 = 10101100

[technoblogical]

You're right, I did my math wrong. I got 44-32=8. Somehow I dropped a 4. Oh well, no one is perfect. Thanks for pointing it out. At least I didn't do it in the important octet.

[psykpyrate]

seriously, the nose wheezing is killing me.

[risk3715]

@technoblogical Praises to your humble response. Hard to find now-a-days. And thanks for the great tutorials. I'm learning a lot (new to the network industry)

[Scorpia4206]

well put vids. great series. big help. thanks

[dan1710]

This video is really good thanks for the help in explaining :D