PPT Slide
For the numerical problem, we have to use 2 subnet masks (VLSMs) within the class B space given to us.
120 hosts require 7 bits => subnet mask = 32 - 7 = 25 bits.
- Mask = 255.255.255.128/25
30 hosts require 5 bits => subnet mask = 32 - 5 = 27 bits.
- Mask = 255.255.255.224/27