Kevin Wallace's Blog

Networking Basics - How RIP Works

network plus May 12, 2021

In this week’s video, you’ll learn about RIP, the Routing Information Protocol, a topic on CompTIA’s Network+ (N10-007) exam. Specifically, you’ll see three different versions of RIP and understand how it uses Split Horizon, along with Poison Reverse, to prevent routing table corruption.

Enjoy the training!

Network Defense Best Practices

network plus Apr 17, 2018

Today's networks face many security threats. The good news is, even without being security experts there are some best practices we can put into place to better protect our networks.

In the latest episode of my podcast, called The Broadcast Storm, you'll learn about a collection of common network threats and best practices to defend our networks.

The specific network threats and mitigations discussed in this episode come from topics CompTIA identified that we need to know for the latest version of their Network+ certification. If you'd like to check out my new Network+ (N10-007) Complete Video Course , it's available for pre-sale at the following link:

http://netpluscourse.kevin.live

Also, use Coupon Code WALLACE50 to take 50% off the price!

By the way, if you're not already a regular listener of The Broadcast Storm, you can subscribe via Apple's iTunes or Spotify using the links below:

The Broadcast Storm on Apple iTunes

The Broadcast Storm on Spotify

...

Wireless LAN Security

ccna r/s network plus Apr 06, 2018

In this new video, you'll learn the need for wireless LAN (WLAN) security, along with multiple approaches and protocols for better securing your wireless LANs.

Topics include:

War Driving
MAC Filtering
Geofencing
Wired Equivalent Privacy (WEP)
Initialization Vector (IV)
RC4 Encryption
Pre-Shared Key (PSK) Mode
Enterprise Mode
IEEE 802.1X
Temporal Key Integrity Protocol (TKIP)
Message Integrity Check (MIC)
Advanced Encryption Standard (AES)
Counter Mode with Cipher Block Chaining Message Authentication Code (CCMP)
Wi-Fi Protected Access (WPA)
WPA2
WPA3
Extensible Authentication Protocol (EAP)
EAP-TLS
EAP-FAST
PEAP

This video is a sample from Kevin's new CompTIA Network+ (N10-007) Complete Video Course. To save 50% on your purchase of the video course, use the Coupon Code WALLACE50 during checkout HERE.

Kevin Wallace, CCIEx2 (R/S and Collaboration) #7945

The Fundamentals of IP, ICMP, UDP, & TCP

ccna r/s network plus May 03, 2016

In this video we’re covering the fundamental concepts surrounding the IP, ICMP, UDP, and TCP networking protocols. Having a solid understanding of these protocols is critical to just about everything else we do in networking. So, I thought it would make a great review for you.

Enjoy the video!

Kevin Wallace, CCIEx2 (R/S and Collaboration) #7945, CCSI 20061

If you enjoyed this article, you might also want to subscribe to my podcast:

iTunes: http://kwtrain.com/podcast

RSS: http://kwtrain.com/rss

How to Calculate an EUI-64 Address

ccna r/s network plus Feb 09, 2016

An IPv6 address is 128 bits in length, and like an IPv4 address, it’s divided into prefix bits (representing the network segment) and host bits (uniquely identifying a host on that network segment). A common approach is to use 64 bits to represent the network segment and 64 bits to represent the host on that network segment.

While you could manually configure the host bits for a router interface, a more efficient approach might be to automatically calculate those host bits using a 64-bit Extended Unique Identifier, known as EUI-64. For example, let’s say you have a router interface on the IPv6 network of 2000:1::/64. You could (in interface configuration mode of your Cisco IOS router) enter the command:

ipv6 address 2000:1::/64 eui-64

This command tells the interface to use 2000:1:: as the network portion of the IPv6 address and to automatically calculate the 64-bit host portion of the IPv6 address.

EUI-64 uses an interface’s MAC address as the basis of...

Introduction to Storage Area Network (SAN) Technologies

network plus Aug 20, 2015

Storage Area Networks (SANs) allow devices (e.g. PCs or servers) to store and retrieve data from hard drives that are attached somewhere on a network, as opposed to being directly attached to the device itself.

This video introduces you to the exciting world of SAN technologies.