The following blog has been compiled to provide information for the different type(s) of WAN Technologies. Keep in mind that Ethernet is a fast growing WAN technology with companies moving to deploy VPLS, MPLS and TLS Circuits for WAN connectivity. As a Cisco network engineer you will still encounter legacy WAN connections. Digital Subscriber Line (DSL) technologies are fairly common in the United States and other developing nations that provide broadband to customers over existing telephone wire infrastructure. The is however the limitation of distance which basically means...
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How to make a T1 Crossover Cable
For years people have used the old and untrusty DB60 DCE to DB60 DTE cables to simulate WAN connectivity between Cisco Routers using WIC-1T modules; and what I mean by untrusty is that these cables have a tendency to go bad after you move them around a lot in a lab environment. While the WIC-1T cards are extremely cheap, the DB60 DTE to DB60 DCE cables can cost anywhere between $5.00 to $15.00 each which can add up really fast in a lab that has more than 5...
Read MoreOpengear and the Stub Lab
The Stub Lab is a fully functional Cisco Lab provided as a free service to the community by Free CCNA Workbook. All you need to do to gain access to a top notch Cisco Lab that has ISR's, Multi-layer switches, Cisco ASA's and more is sign up at the Stub Lab Schedule Portal and reserve lab time. When your lab time comes you can log into the lab devices remotely using Telnet and have access to real Cisco hardware to perform educational labs on for the...
Read MoreCCIE Poaching and Sniping…
The CCIE Certification is an extremely sought after certification not just from an engineering perspective but also a Company perspective. In order for any company to become a Silver or Gold Certified Partner with Cisco, they must have 2 CCIE's full time for Silver and 4 CCIE's full time for Gold. This requirement cannot be waived and this makes the CCIE valuable to companies because when companies have Silver or Gold partnership status they get certain benefits from Cisco such as discounts, access and etc... If you just...
Read MoreCisco ASA Pre-8.3 NAT & Post-8.3 NAT
When Cisco made changes to the Cisco ASA software in 8.3, it completely shook the ASA engineering community. Major changes overhauled the operating system in how the Cisco ASA handles Network Address Translation. Even today, these changes still surprise people when upgrading from 8.2 to 8.3 or later and many people have a hard time understanding these changes. However, these changes are actually a good thing as it gives you more granular control over the NAT function(s) that your Cisco ASA performs. I have compiled a list of differences...
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