Network Troubleshooting and Tools

Data networks are full of moving parts, interacting in complex ways. This course will teach you the tools and techniques required to troubleshoot a data network. Skills that are necessary for a network engineer.
Course info
Rating
(15)
Level
Beginner
Updated
Apr 20, 2018
Duration
2h 54m
Table of contents
Course Overview
Troubleshooting Methodology
Network Tools and Utilities
Windows and Linux CLI Utilities
Wired Network Troubleshooting
Wireless Network Troubleshooting
Troubleshooting Network Services
Description
Course info
Rating
(15)
Level
Beginner
Updated
Apr 20, 2018
Duration
2h 54m
Description

There are what feels like a near infinite number of moving parts in a data network, which means that when things go wrong, they often have cascading consequences that can prevent users from accessing the resources required to do their jobs. In this course, Network Troubleshooting and Tools, you will learn techniques and tools for troubleshooting broken network components. First, you will learn how to use command line utilities like ipconfig, ping, nslookup, Nmap, and netstat. Next, you will learn how to use Wireshark to capture and examine an unencrypted website. Finally, you will learn to use iperf to measure the bandwidth of an internal network and use Nmap to run a port scan on a remote server. By the end of this course, you will know-how to troubleshoot and track down network problems, which are critical skills you must have as an engineer.

About the author
About the author

For nearly 20 years, Ross has taught and managed data networks.

More from the author
Network Security Basics
Beginner
2h 16m
20 Apr 2018
Networking Concepts and Protocols
Beginner
5h 26m
20 Apr 2018
More courses by Ross Bagurdes
Section Introduction Transcripts
Section Introduction Transcripts

Course Overview
Hi everyone. My name is Ross Bagurdes, and welcome to my course, Network Troubleshooting and Tools. I am a network engineer with more than 20 years' experience building enterprise networks and teaching people about them. In the simplest sense, data networking hardware breaks unpredictably often in a way that cascades into much larger issues. Knowing the techniques and tools needed to troubleshoot a network are remarkably important during these outages. In this course, we will look at techniques and tools used to troubleshoot networks, including the command line utilities like ipconfig, ping, and nslookup. We'll look at the Wireshark protocol analyzer. We'll also use NMAP to scan remote servers, as well as learn how to check for common service related issues. By the end of the course, you'll know how to identify a speed and duplex mismatch issue from a bad switchport or bent pins problem on a switch. You'll also be able to use ipconfig and ping to verify that your default-gateway is online. This course builds upon the content in network security fundamentals, and upon completion, you will have the vocabulary, protocol understanding, and troubleshooting tools to be an entry-level network technician. From here, you can move onto more advanced topics in networking like the Cisco Certified Network Associate certification learning path or CCNA learning path. I hope you'll join me on this journey to learn network troubleshooting with the Network Troubleshooting and Tools course, here at Pluralsight.

Troubleshooting Methodology
Welcome to Pluralsight. I'm Ross Bagurdes. This last course in our series here is Network Troubleshooting and Tools. We're going to start off by talking about troubleshooting methodology in this first module. You're going to see a lot of demonstrations of tools we can use in order to help us troubleshoot our networks. To get started here though, I want to look at troubleshooting methodology so we really only have one goal here and that's to examine a methodology that we can use for troubleshooting.

Network Tools and Utilities
Welcome to Pluralsight. I'm Ross Bagurdes. In this module, we're going to talk about network tools and utilities. Our goals this module are going to be to look at some hardware tools. These hardware tools are going to be in the categories of copper hardware tools and looking at how to work with cabling. We're going to look at fiber optic tools and see what tools we can use to help us troubleshoot and work with fiber optics, as well as wireless. Additionally, we're going to look at some software tools here. We're going to look at a Packet Sniffer. We've already looked at one, Wireshark, and we're going to take a look at Wireshark again, just use it in a different capacity. We're going to look at a bandwidth speed test and we're going to use Iperf to do that. And then last, we're going to use a port scanner called NMAP. Let's get started.

Windows and Linux CLI Utilities
Welcome to Pluralsight. I'm Ross Bagurdes. This next section, we're going to look at Windows and Linux CLI utilities. Now CLI is Command-Line Interface. In Windows, that is the command prompt itself. In Linux, it's called the Terminal. So we're going to take a look at utilities that are built into these operating systems that we use at a regular basis to troubleshoot systems. Our goals are real simple. We're going to do some demonstrations of Windows utilities and Linux utilities.

Wired Network Troubleshooting
Welcome to Pluralsight. I'm Ross Bagurdes. I'd like to continue on our troubleshooting course here by talking specifically about wired network troubleshooting. What I'd like to do in this module is talk a little bit about the different symptoms that can present themselves in wired network troubleshooting and then talk about some cabling issues that can occur that could cause these problems, as well as Layer 2 issues that can cause these problems.

Wireless Network Troubleshooting
Welcome to Pluralsight. I'm Ross Bagurdes. This next module, we're going to look at wireless network troubleshooting and some of the issues that can occur with wireless networks that we need to be aware of when we're trying to discover what might be causing an issue in our wireless network. Our goals this module will be to look at some wireless network symptoms. We're going to look at building issues, mainly what stuff in a building can actually prevent our wireless from working correctly, we'll look at wireless issues and how wireless setup can cause some issues of their own, and also, we'll look at some configuration issues that can also cause lack of wireless connectivity.

Troubleshooting Network Services
Welcome to Pluralsight. I'm Ross Bagurdes. This last module, Troubleshooting Network Services, is the last module in this course, as well as in this series, and the intention of this module is to go through very common network service issues and a good methodology to approach troubleshooting them. Let's take a look at what we're going to do in this module. We're going to do some troubleshooting of IP configuration issues and see how some IP issues show up on a network. Next, we're going to look at some DHCP issues and see what happens when DHCP servers run out of addresses or there is a rogue DHCP server on our network. We'll look at troubleshooting some service issues including figuring out how to detect if a service is open or closed and if a server is online or not. And last, we're going to look at some security issues as well, looking at some ACL and potential firewall issues, as well as some SSL certificate issues that we can check out.