By Russell Hughes | 1 Min Read | 12 Min Video | Technical Level: Beginner

Variable-Length Subnet Masking (VLSM) amounts to “subnetting subnets,” which means that VLSM allows network engineers to divide an IP address space into a hierarchy of subnets of different sizes. By doing this, it is possible to create subnets with very different host counts without wasting large numbers of addresses.

This video is a continuation of the Subnetting Made Easy video previously recorded by Sunset Learning Institute. In this video, Sunset Learning instructor Russell Hughes describes what is VLSM, when you should use it, and demonstrates building your VLSM.

For More Information On Sunset Learning’s Authorized Cisco Routing and Switching Training, Please Visit our Routing and Switching Training Page.  All Our Classes Are Guaranteed to Run! 

Instructor Bio:

Russell has over 25 years of experience in the field of networking and 20 years as an instructor. He has delivered courses for SLI, formerly CCTI, for fourteen years, specializing in security, content networking, and Voice over IP solutions. Russell started his career in the IT industry as a systems administrator, where he was in charge of daily maintenance of Windows servers, backup solutions, and e-mail. He helped design and build a remote classroom lab solution that allowed CCTI/SLI to deliver Cisco courses anywhere in the world without the need to ship Cisco equipment. Russell currently teaches CCNA and CCNP level courses, with expertise in content networking, IPv6, BGP, and Data Center areas.