This post is for you regular users of Certskills.com. We just completed a fairly major update of the site! But most of the changes are hidden from you. In this post, I’ll let you know what [...]

I’ve been building a YouTube Channel, @NetworkUpskill, for a couple of years now. I’m working hard to complete a full CCNA course there. I’m abouot 60% complete as of when I [...]

Over at my YouTube channel, I’ve created some labs that exist solely as videos plus a Cisco Packet Tracer .pkt file. The video begins with instructions. Then pause the video, download the [...]

Over at my YouTube channel, I’ve created some labs that exist solely as videos plus a Cisco Packet Tracer .pkt file. The video begins with instructions. Then pause the video, download the [...]

Over at my YouTube channel, I’ve created some labs that exist solely as videos plus a Cisco Packet Tracer .pkt file. The video begins with instructions. Then pause the video, download the [...]

Over at my YouTube channel, I’ve created some labs that exist solely as videos plus a Cisco Packet Tracer .pkt file. The video begins with instructions. Then pause the video, download the [...]

Over at my YouTube channel, I’ve created some labs that exist solely as videos plus a Cisco Packet Tracer .pkt file. The video begins with instructions. Then pause the video, download the [...]

As with all the Config Labs with “BIG” in the title, this lab is different than most. This BIG lab collects many of the configuration topics in Volume 1, Part 5 of the CCNA Official [...]

IP Subnetting includes a variety of math processes that answer specific questions. But how do those processes then apply to building networks? In this BIG exercise, I’ll pull some of those [...]

This lab is different. Instead of a focused lab about one main topic, this one covers several: VLANs, VLAN trunks, Spanning Tree, and EtherChannel. And most CCNA folks will take more than the [...]

Over the years, I’ve created a bundle of about 75 lab exercises here at the blog, called Config Labs. The idea is to read the web page for the lab, then do the lab, and then check your [...]

This post presents questions that ask you to analyze design data about a network and then choose the one subnet mask to use for all subnets. If a company uses one subnet mask for all subnets of [...]

Cisco plans to release start testing based on the CCNA 200-301 Version 1.1 blueprint starting August 20, 2024, replacing the former V1.0 blueprint. Yes, we have new books out mid-year 2024 that [...]

Hi all you regular blog users, I’m sure you know we released new CCNA Official Cert Guides in mid-year 2024. Those books impact this blog because the blog organizes its content to match the [...]

This post asks you to analyze the choice of subnet mask in a network. If a company uses one subnet mask for all subnets of one classful network, you can analyze the address structure as three [...]

This post asks you to analyze the choice of subnet mask in a network. If a company uses one subnet mask for all subnets of one classful network, you can analyze the address structure as three [...]

This post asks you to analyze the choice of subnet mask in a network. If a company uses one subnet mask for all subnets of one classful network, you can analyze the address structure as three [...]

This post asks you to analyze the choice of subnet mask in a network. If a company uses one subnet mask for all subnets of one classful network, you can analyze the address structure as three [...]

These practice posts focus on the single most important subnetting process: Find the four defining facts about a subnet based on one address and mask that resides in that network. Your first goal [...]

These practice posts focus on the single most important subnetting process: Find the four defining facts about a subnet based on one address and mask that resides in that network. Your first goal [...]

These practice posts focus on the single most important subnetting process: Find the four defining facts about a subnet based on one address and mask that resides in that network. Your first goal [...]

These practice posts focus on the single most important subnetting process: Find the four defining facts about a subnet based on one address and mask that resides in that network. Your first goal [...]

For each Mask Conversion Drill post, you’ll find a mix of DDN and prefix masks. Your job is to convert each to a binary mask first and then to the other format.

For each Mask Conversion Drill post, you’ll find a mix of DDN and prefix masks. Your job is to convert each to a binary mask first and then to the other format.