It’s difficult to troubleshooting something you can’t see. In this video, you’ll learn how to resolve wireless interference, manage channel usage, resolve roaming misconfigurations, and more. << Previous: Performance Issues Next Video: Software Tools >> On a wireless network, there are only so many frequencies available to be used by your access point and your […]

There’s never enough bandwidth. In this video, you’ll learn how to troubleshoot congestion, bottlenecks, latency, packet loss, and jitter. << Previous: Routing and IP Issues Next Video: Wireless Issues >> Our networks run at a predefined speed. For example, a 1000BASE-T gigabit network operates and sends traffic at 1 gigabit per second. This network cannot

Configuring a router incorrectly can cause a number of network issues. In this video, you’ll learn about routing tables, the gateway of last resort, address pool exhaustion, and troubleshooting duplicate IP addresses. << Previous: Switching Issues Next Video: Performance Issues >> If you’re the administrator of routers, then you’re certainly familiar with the importance of

An incorrectly configured switch can be a critical error. In this video, you’ll learn about stopping switching loops with spanning tree protocol, managing VLAN assignments, and best practices for configuring access control lists. << Previous: Hardware Issues Next Video: Routing and IP Issues >> As you’re probably aware, at the Mac address level, there’s no

A single hardware issue can cause signficant problems on a production network. In this video, you’ll learn about PoE standards, transceiver mismatches, and how to calculate transceiver signal strength. << Previous: Interface Issues Next Video: Switching Issues >> If you’ve recently installed a telephone on a desktop, an access point, or a camera on your

A network interface can tell a lot about the health of the network. In this video, you’ll learn about interface monitoring, CRC errors, runts, giants, drops, error disabled states, and port status messages. << Previous: Cable Issues Next Video: Hardware Issues >> Network administrators use a great deal of their time to monitor different interfaces

If the physical layer isn’t right, the network will have big problems. In this video, you’ll learn about fiber mismatches, cable categories, crosstalk, EMI, attenuation, and proper termination. << Previous: Network Troubleshooting Methodology Next Video: Interface Issues >> When you’re working with fiber optics, you have to make sure that you’re using exactly the right

Network professionals solve problems every day. In this video, you’ll learn how a troubleshooting methodology can simplify complex issues and make it easier to identify and solve big problems. << Previous: Security Rules Next Video: Cable Issues >> When you work with networks, there will be problems that need to be resolved and issues that

We often use rules to allow or prevent access to important resources. In this video, you’ll learn about access control lists, firewall rules, content filtering, screened subnets, and security zones. << Previous: Device Security Next Video: Network Troubleshooting Methodology >> One common way to limit the type of traffic that can traverse the network is