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Network Address Translation - NAT
After that simple and informative introduction to the NAT concept, it's time to find out more about how it works and this is where the NAT table comes in. The Network Address Translation (NAT) Table…
Network Fundamentals
In this section we are going to talk about the different ways a firewall can be set up. Depending on your needs, you can have a very simple firewall setup which will provide enough protection for you…
Network Cabling
Today, Serial and Parallel Direct Cable Connections are considered obsolete methods of transferring data between computers. The fact is that even USB Direct Cable Connection (DCC), is not all that po…
The OSI Model
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…
Network Protocols
TFTP is a file transport protocol and its name suggests it's something close to the FTP protocol (File Transfer Protocol), which is true .. to a degree. TFTP isn't very popular because it's not reall…
TCP - UDP Protocol Analysis
Finally, the last page of our incredible TCP Analysis. As most of you would expect, this section is dedicated to the DATA section that follows the TCP Header. The Data Section The following diagram…
Domain Name System (DNS)
If you ever wondered where DNS came from, this is your chance to find out ! The quick summary on DNS's history will also help you understand why DNS servers are run mostly on Linux and Unix-type syst…
Network Fundamentals
Power over Ethernet (PoE) was invented by PowerDsine back in 1997 and the first power injector (Midspan) was installed in 1998! Many manufacturespartnered with PowerDsine to make useof this innovatio…
Network Protocol Analyzers
Colasoft Unified Performance Management (UPM) is a business-oriented network performance management system, which analyzes network performance, quality, fault, and security issues based on business…
Windows Servers
FREE Hyper-V & VMware Virtualization Backup:  FREE for Firewall.cx readers for a Limited Time!  Download Now! Windows Server 2012 Editions On the 1st of August, 2012 Microsoft releas…
Palo Alto Networks
Discover the ins and outs of using Palo Alto Networks’ Software NGFW (Flex) credits to seamlessly renew your cloud-based or virtualized software NGFW devices! Dive into this exciting guide where we u…
Virtualization & VM Backup
In this article we will cover the differences between VMware ESXi, vSphere and vCenter while also explain the features supported by each vSphere edition: vSphere Standard, Enterprise plus and Plantiu…

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