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Top-Paying IT Certifications for 2018

Article | Jan. 15, 2018

Topping this year’s list is ISACA with four IT certifications, followed by AWS, Cisco and Citrix. Our 2018 IT Skills & Salary Report also shows trending areas in cybersecurity, cloud computing, and business—demonstrating what skills you need to become a more valuable and higher-paid IT professional.

Six Scary IT Certification Exams

Article | July 13, 2017

Certifications are the most common way in IT to prove you have the skills to solve various technical and business challenges. In this article, I'll address a range of skill sets. For each certification listed, I've included what the certification measures, the requirements to obtain it.

The Benefits of Cisco ACI in the Data Center

Article | June 19, 2017

In 2013, Cisco released their Software Defined Networking (SDN) solution for the data center known as Cisco Application Centric Infrastructure (ACI). For many years, the networking industry has been asking for an approach to configuring networking devices more efficiently than having to individually configure each and every router and switch.

How to Control IGP Updates with Route Maps and Distribute Lists

Article | May 09, 2017

The purpose of Interior Routing Protocols (IGP), and routing protocols more generally, is to advertise the existence of destination networks. All protocols then have some method of picking what they would consider to be the best path and maintain the information. By...

A Guide to Network Time Protocol (NTP)

Article | May 03, 2017

What is Network Time Protocol (NTP)? Well, it’s a network protocol used to synchronize clocks between computing systems over a packet switched network. It’s been around since the mid-1980s and was developed by David Mills at the University of Delaware; it is one of the oldest protocols still around on the Internet. NTP replaced other time synchronization technologies that didn’t have some capabilities to adjust time based on location of the time source or time server relative to the receiver or adjusting to the variation of delay found on typical data networks.

How Precision Time Protocol (PTP) is Improving Accuracy One Clock at a Time

Article | April 27, 2017

Precision Time Protocol (PTP) is a protocol designed to go beyond what Network Time Protocol (NTP) can offer relative to accuracy. PTP is IEEE standard 1588 that can give local computing systems accuracy within the sub-microsecond range (such as microsecond, nanosecond or picoseconds) whereas NTP is within milliseconds or longer. PTP standard was first released in 2002 and known as 1588-2002. In 2008, the IEEE released a revised standard for PTP, known as 1588-2008, that improved the accuracy and precision of the protocol. It is also known as PTPv2 and is not backward compatible with the older version. PTP was developed for packet based network for control and measurement systems.

How to Reach Devices in Other Domains with IGP Route Redistribution

Article | Feb. 20, 2017

One size does not always fit all. At times there’s a need to run more than one routing protocol and have more than one routing domain: multivendor shops, migration from one protocol to another, scalability issues of a single protocol, political or personal preference, production versus test networks, mergers, and acquisitions.

Know Your Options Before Selecting a Routing Protocol

Article | Feb. 07, 2017

Routers and switches make up the bulk of the network infrastructure and are vulnerable to attack. In a previous article, I talked about some of the different ways of hardening your network devices. In this blog, I’d like to specifically examine the routing protocols used on the major Cisco network operating systems.

How to Troubleshoot Cisco’s Dynamic Multipoint VPN (DMVPN)

Article | Feb. 02, 2017

Dynamic Multipoint Virtual Private Network (DMVPN) is a Cisco network solution for those with many sites that need access to either a hub site or to each other.

Cisco CCNA Routing and Switching Paths

Video | Sep. 28, 2016

Understand the two training options to prepare for the CCNA Routing and Switching certification - traditional and accelerated. Global Knowledge allows you to learn at your pace. The traditional training path features two courses, ICND1 and ICND2, and ten days of training. The accelerated training path combines the content found in ICND1 and ICND2 into a single 5 day course, the CCNAX Routing and Switching Boot Camp. Learn which option is best for you.