Identifying Common Network Issues

Name: Identifying Common Network Issues
Author: Matthew Mercaldi

Get a brief overview of some common problems a network may experience

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Course: On-Demand

Hello, my name is Matt Markaldy, and in these lessons, you will learn about physical network troubleshooting, logical network troubleshooting, and software feature issues. Networking hardware. So, a lot of times what'll happen with me is I'll get a call saying that the internet's running slow. And a lot of times that could be because of switch, the router or firewall has high CPU or high memory. And that's being caused by one or two processes that is using up all the memory or all the CPU. In some cases, depending on the vendor, I can just simply kill the process and restart it and everything will be good. Other times you have to do a complete reboot of the firewall and usually that resolves the issue. There are sometimes that does not, which then you have to contact support. Bad component on a hardware. So, this could mean bad power supply, bad NIC, bad memory. A lot of times you can replace yourself on there. The switch, router, or firewall just died. This happens a lot, too. Nothing you can do about it. Could be bad power supply that just exploded on there. Some of the motherboard is fried. You just gotta contact the vendor and get a replacement or if you have a spare laying around, just for the time being, just put it in there. Cabling issues. This is very common as well. The cable's plugged into the wrong port. It could be a bad cross connect. Maybe it plugged into the wrong switch port. If it's plugged into the wrong switch port, you don't really need to do too much on it. You just change the VLAN you're connected to. Hopefully though, your network closet or desk does not look like this. You see all that spaghetti string in there. I've worked in situations like this. They're not fun. I've ended up working weekends just to redo all the cabling. I've worked with coworkers on doing this. I've also worked on hiring vendors whose sole job is just to do this. So, this is something you do not want to have to manage. And hopefully, you're not managing something like this. The internet service provider. So, it doesn't matter who you use, AT&T, Lightpath, Coach and Verizon. A lot of times there'll be a cut fiber due to construction. And if that is the case, that will either completely kill your service or prevent you from reaching certain websites or certain other LAN networks? Nothing can do about that until the ISP does their magic. Bad media converter. So, if you have a fiber handoff and you don't wanna get SFP module, or if your equipment doesn't have a SFP module in there, then your ISP will normally provide you with a media converter. Unfortunately, they provide you with a used one, maybe one that's been used on different networks for various years. It could even be on its last leg, they don't really know. Not much else you can do with that, unless again, if you just get SFP module and put it into your router or switch, and that would normally resolve your issues. That's all for today. Thank you for listening.

Intermediate Provider : Matthew Mercaldi 3 Lessons · 13m in Arabic, German, English, Spanish, French, Portuguese, Chinese

Course Description

This course will give you a brief overview of routing, wiring, and certificate issues. You will learn to look for small details that could cause problems in your configuration. We’ll also go over the importance of having an organized data center, along with web applications and how they relate to certificates.

What You'll Learn

Identify common routing, wiring, and certificate issues that affect network configuration
Examine small configuration details that could cause problems in your setup
Troubleshoot physical network issues
Diagnose logical network problems
Resolve software or feature-related issues
Understand how web applications relate to certificates and the importance of an organized data center

Key Takeaways

The course provides a brief overview of routing, wiring, and certificate issues.
Small details in your configuration can cause network problems, so careful inspection matters.
An organized data center is important to network operations.
Web applications relate to certificates, which the course explains.

Frequently Asked Questions

What topics does this course cover?

It gives a brief overview of routing, wiring, and certificate issues, and covers physical network issues, logical network troubleshooting, and software or feature issues, along with the importance of an organized data center and how web applications relate to certificates.

What skills will I gain from this course?

The course builds skills in network diagnostics, network troubleshooting, and networking basics, and relates to Cisco Certified Network Associate (CCNA) Routing and Switching, Cisco Certified Network Professional (CCNP) Routing and Switching, and Networking Concepts Certification.

What lessons are included in the course?

The course includes three lessons: Physical Network Issues, Logical Network Troubleshooting, and Software or Feature Issue.

Why does the course emphasize looking at small details?

Because small details in your configuration could cause problems, the course teaches you to look for them when identifying network issues.