Articles That Might Interest:

Ethernet Protocol, CSMA/CD, Collisions

Early Ethernet Collisions

In this example, we will refer to an imaginary Ethernet network consisting of Stations A and B and any number of other stations. The status of the network is such that the wire is idle (nobody is tal…

Windows Servers

Windows 2003 DHCP Server Installation & Configura…

DHCP (Dynamic Host Configuration Protocol) is a protocol that allows clients on a network to request network configuration settings from a server running the DHCP server service which, in our case, w…

Cisco Firewalls

Cisco ASA 5500 Series Firewall Modules & Cards –…

Cisco’s Adaptive Security Appliance (ASA) Firewalls are one of the most popular and proven security solutions in the industry. Since the introduction of the PIX and ASA Firewall into the market, Cisc…

Network Cabling

Fibre Optic Cables - Single-Mode Multi-Mode - Adv…

In this article, we'll talk about Fiber optic cables and how it has changed the design and implementation of network infrastructures, providing high Gigabit speeds, increased security, flexibility an…

Network Address Translation - NAT

Dynamic NAT - Part 1

Dynamic NAT is the second NAT mode we're going to talk about. Dynamic NAT, like Static NAT, is not that common in smaller networks but you'll find it used within larger corporations with complex netw…

Palo Alto Networks

Introduction to Palo Alto Next-Generation Network…

During the past decade, we’ve seen the global IT security market flooded with new network security and firewall security appliances. New vendors emerging into the market while existing well-known ven…

Linux - Unix

Linux BIND DNS - Part 5: Configure Secondary (Sla…

Setting up a Secondary (or Slave) DNS sever is much easier than you might think. All the hard work is done when you setup the Master DNS server by creating your database zone files and configuring th…

Web Application Vulnerability Scanners

Creating a Cross-site Scripting (XSS) Attack. Und…

Part two of our Cross-site scripting (XSS) series shows how easy it is to create & execute a XSS attack, helping readers & network security engineers understand how XSS attacks work and how t…

Virtualization & VM Backup

5 Most Critical Microsoft M365 Vulnerabilities Re…

Microsoft 365 is an incredibly powerful software suite for businesses, but it is becoming increasingly targeted by people trying to steal your data. The good news is that there are plenty of ways adm…

Windows Servers

The Importance of a Hyper-V & VMware Server Backu…

Using Hyper-V Server virtualization technology, you can virtualize your physical environment to reduce the cost of physical hardware. As part of IT best practices, you implement monitoring solutions…

Cisco Routers

How to Restrict Cisco IOS Router VPN Client to La…

In our article Cisco VPN Client Configuration - Setup for IOS Router we explained how to setup up a Cisco IOS router to support Cisco IPSec VPN clients, allowing remote users to securely connec…

The OSI Model

The OSI Model: Layer 1 - Physical Layer

The Physical layer has two responsibilities: it sends bits and receives bits. Bits come only in values of 1 or 0. The Physical layer communicates directly with the various types of actual communicati…