As usual, the “answers” post only makes sense after reading the “question” post. Use the question as a place to practice and ignore the speed and time pressure, or use it truly as a speed test. [...]

It’s time for the last #CCENT VLSM speed test for a while. Your job: any way you know how, derive the subnet IDs, and the range of addresses in each subnet, and then compare the subnets to [...]

The answer for Overlapping VLSM Subnets Speed Test 2 are below the fold! Here’s a complete list of related posts: Intro to overlapped subnet problems All Overlapped Subnet problems IPv4 [...]

Time for another practice problem to find any overlapping IPv4 subnets. I’ve kicked this one up a notch compared to the previous exercise – this time the list (below the fold) shows IP [...]

The answer for Overlapping VLSM Subnets Speed Test 1 are below the fold! Other posts in this series: Overlapping Subnets – the Problem VLSM subnet overlap problem 1

It’s subnetting Friday – #CCENT edition. Your job? Look at a set of 5 or 6 subnet/mask combos, and identify which ones overlap, and which ones do not. There may be no overlaps, or there may [...]

#CCENT and #CCNA testing, as well as real-life network engineering, requires that we find configuration and design errors in the network. Problems can occur when the design and configuration of [...]

This post wraps up the #CCNA Q&A focused on how routers add routes to their routing tables. What happens when a router happens to learn three separate routes for the same subnet ID – but with [...]

What happens when a router happens to learn three separate routes for the same subnet ID – but with different masks, and with different routing protocols? What should you be thinking about when [...]

#CCNA study scenarios often focus on the most common and most obvious combinations of events. However, sometimes it helps to think about some more unusual scenarios just for the purpose of [...]