There are some networking terms and concepts that are so fundamental and important that every TCP/IP networking professional must know them by heart. One of these fundamental concepts is VLAN Trunking. What is VLAN Trunking in Networking? A VLAN Trunk falls into Layer 2 of the OSI model and is related to network switching. When […]
10 Different Types of Network Ethernet Switches for Small or Large Networks
Network Switches form the backbone of computer networks and are one of the main building blogs of a Local Area Network (LAN). A network switch usually operates at Layer 2 of the OSI model (working with the Ethernet protocol) but there are switch models that implement also routing, which can be considered as Layer 3 […]
Udemy vs Skillshare for Online Learning/Training for Students
Technology and IT training is booming as professionals must keep sharpening their skills and knowledge to stay competitive. However, technology is not the only field that people pursue additional knowledge and training. Many individuals want to expand their education and knowledge in a broad range of fields such as marketing, software development, information security, business, […]
20 Best Udemy Alternatives for Online Learning and Training
Udemy is an online course platform that lets you learn pretty much anything at any time. Once you’ve purchased a course, you get lifetime access to it so you can truly train at your own pace. People have been using this site for progressing in their current career, working towards a career change, and learning more about their […]
Cisco Show Interface Command on Routers and Switches Explained
One of the most useful and popular commands used on Cisco devices is the “show interface” command. It can be very useful at troubleshooting connectivity issues and physical port issues, check the status of physical ports, watch how much traffic is passing through the interface, which IP address is assigned to the interface (for Layer3 […]
Udemy VS Coursera: Which Platform Should You Choose for Online Learning?
Online learning platforms exploded in popularity a few years ago. Recently, a handful of platforms have fought their way to the top in the market of MOOCs (Massive Open Online Course). Both Udemy and Coursera often come up in conversations about the best learning platforms. A given person might assume they offer a similar experience […]
Configuring GRE Tunnel Through a Cisco ASA Firewall
In this configuration tutorial I will show you how to configure a GRE tunnel between two Cisco IOS routers. One of the routers is located behind a Cisco ASA 5500 Firewall, so I will show you also how to pass GRE traffic through a Cisco ASA as well. As you might know already, GRE tunnel […]
10 Best Computer Networking Jobs with High Salaries in USA
In these days of uncertainty around employment, IT remains a solid option for those who either have the qualifications or those who are seriously thinking about a career change. In this article I’ll discuss the best-paying jobs, both in the core networking field and in network security as well. There are many roles and job […]
Cisco ASA 5505-5510-5520-5540-5550-5580 Performance Throughput and Specs
The Cisco ASA 5500 series of firewall appliances has been in the market for a long time when they replaced the older PIX hardware firewalls. The new generation of-course listens to the name ASA 5500-X which is currently in the market. However many professionals and companies still have older ASA 5500 series firewall appliances in […]
Cisco ASA Active-Standby Failover Configuration Example
On my previous post I talked about Cisco ASA Active/Active configuration. In this post I will describe Active/Standby redundancy which is used much more frequently compared with the active/active scenario. ASA Active/Standby failover/redundancy means connecting two identical ASA firewall units via LAN cable so that when one device or interface fails then the second one […]
Configuring a Warning Login Banner on Cisco ASA Firewall
It is a good security practice to configure a Warning login banner on your Cisco ASA firewall appliance for unauthorized access attempts. In this article we will describe how to configure such a banner for different ways available for connecting to the appliance such as using the graphical interface (ASDM), session, login etc. The command […]
Cisco ASA NTP and Clock Configuration with Examples
The Cisco ASA appliance retains clock settings in memory via a battery on the device motherboard. Even if the device is turned off, the clock is retained in memory. Configuring accurate time settings on the appliance is important for logging purposes since syslog messages can contain a time stamp according to the device clock time […]
PPTP Remote Access VPN Configuration on Cisco Routers
One of the easiest ways to configure simple remote access VPN functionality for your remote users is by configuring PPTP. This is supported on Cisco routers and will work with Windows OS flawlessly. What is PPTP PPTP (Point to Point Tunneling Protocol) is a quick and easy solution to offer remote access to users. Since […]