O'Reilly logo

Cisco CCENT/CCNA ICND1 100-101 Official Cert Guide by Wendell Odom

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Appendix H. Practice for Chapter 20: Variable-Length Subnet Masks

Practice Problems

This appendix includes two varieties of VLSM practice problems related to Chapter 20, “Variable-Length Subnet Masks.” The first type of problem lists pairs of IP addresses and masks from a network, and your job is to discover whether any of the subnets implied by those addresses/masks overlap. The second problem starts with a list of existing subnets, and your job is to find the numerically lowest new subnet ID that could be added to that internetwork for a given mask.

Note that you can find additional practice at the author’s CCENT and CCNA blog, which is linked from the author’s website, www.certskills.com.

Practice Finding VLSM Overlaps

Table H-1 lists three ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required