The process for troubleshooting a network problem can be challenging without the right process. In this video, you’ll learn a step-by-step method for troubleshooting all types of network issues. << Previous Video: Network Segmentation Next: Hardware Tools >> When you’re troubleshooting complex network problems, you may find that the resolution is not as obvious as […]

There are many issues that can cause problems with applications and services. In this video, you’ll learn about untrusted SSL certificates, exhausted DHCP scopes, unresponsive services, and much more. << Previous Video: Wireless Network Troubleshooting If your domain name services aren’t working, then you’re going to have a difficult time resolving an IP address from

Network segmentation can provide significant security benefits. In this video, you’ll learn about physical segmentation, logical segmentation, and the use of DMZs. << Previous Video: Switch Port Protection Next: Network Troubleshooting Methodology >> When someone is talking about segmenting the network, they’re usually talking about segmenting things into separate devices or perhaps separate VLANs or

If you manage switches, then you’ll need to understand the best way to secure your switched infrastructure. In this video, you’ll learn about Spanning Tree Protocol, BPDU guard, root guard, and more. << Previous Video: Mitigation Techniques Next: Network Segmentation >> At the MAC address level, there’s no calendars or any other way to tell

There are a number of ways to minimize the impact of a security event. In this video, you’ll learn about IPS signature management, file integrity monitoring, managing access control lists, and much more. << Previous Video: Device Hardening Next: Switch Port Protection >> There are a number of things you can do to prevent security

There are many different ways to harden devices from security exploits. In this video, you’ll learn about upgrading firmware, patch management, file hashing, and much more. << Previous Video: Vulnerabilities and Exploits Next: Mitigation Techniques >> As a network administrator, you’ll be connecting switches, routers, firewalls, and many other devices to the network. In this

In network security, we use specific terms to help describe security status and events. In this video, you’ll learn the differences between a vulnerability and an exploit. << Previous Video: Man-in-the-Middle Next: Device Hardening >> The term “vulnerability” and the term “exploit” are sometimes incorrectly used interchangeably. In this video, we’ll look at the differences

A man-in-the-middle attack can allow an attacker to view all of the network information sent and received by your workstation. In this video, you’ll learn about man-in-the-middle attacks, ARP poisoning, and man-in-the-browser attacks. << Previous Video: VLAN Hopping Next: Vulnerabilities and Exploits >> We usually consider our network communication to be private. We’re communicating to