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What Traffic Goes Into Each QoS Class?

Article | Jan. 25, 2013

This is another topic of heated debate, and it changes from network to network, but I found a simple approach that works in most cases. Since I have four queues and four classes of traffic, I need to categorize my important traffic into four classes. Strictly for explanation purposes I took some liberty in defining four categories of traffic that are very effective in both large and small networks. These classes are: Real Time Protocol (RTP), Network Management (NetMgt), Business Critical, and the Default.

What’s the Value of an AWS Certification?

Article | Feb. 03, 2015

It’s common knowledge that earning an AWS certification is a great way to qualify your experience in the eyes of your peers and employer and to increase your organization’s proficiency with AWS-based applications. However, there is another benefit that has not be quantified until now. Results from the 2015 IT Skills and Salary Survey conducted by Global Knowledge and Windows IT Pro revealed that the average pay of four AWS certifications exceeded $100,000. While there is no guarantee that a certification equals a six-figure salary, it certainly couldn’t hurt.

What’s the Difference between Video Conferencing and Telepresence?

Article | March 18, 2014

With the advent of video use in our everyday communications, a number of questions commonly surface. One of them is the question of terminology. What's the difference between video conferencing and telepresence? What is meant by immersive technologies? Frankly, there is no one single right answer.

What’s an RFC and what can they do for me?

Article | Sep. 16, 2009

No matter what book or manual you use to study for the CCNA examination, you will see various protocols and processes referencing an RFC. And, although frequently referenced, the RFCs are seldom actually included in the documentation. So, the logical question becomes...

What's New in Windows 10

Webinar – Recorded | Oct. 15, 2015

Whether you've already upgraded to Windows 10 or you're interested to learn more, this webinar will help familiarize you with the major updates and features. Join Microsoft instructor, John Panagakos, for an hour-long webinar that will dive into the exciting new features Windows 10 has to offer.

What's New in vSphere 8?

Article | March 27, 2023

VMware vSphere 8 is the enterprise workload platform that brings the benefits of cloud to on-premises workloads. It supercharges performance with DPU and GPU based acceleration, enhances operational efficiency through the VMware Cloud Console, seamlessly integrates with add-on hybrid cloud services, and accelerates innovation with an enterprise-ready integrated Kubernetes runtime that runs containers alongside VMs.

What's New in vSphere 5.5

White Paper | Oct. 16, 2013

vSphere 5.5 is now available with myriad small improvements such as a faster Web Client, LACP, Autoscale and higher configuration maximums. In addition, there are changes coming such as VSAN, which may be ground-breaking in regard to VM storage of the future. Since the release of vSphere 5.5, they have not yet announced a change to the blueprint for the test. That being the case, I will say, for now, that the VCP-510 test should remain unchanged as well. My goal here is not to reeducate you on everything that you need to know for the test; instead, it is to point out the few changes that might apply in your company or organization.

What's New in the CompTIA Network+ (N10-006) Exam

White Paper | Sep. 25, 2015

CompTIA has raised the bar for Network+ candidates. The new certification exam has significant changes to the five "domains" or knowledge areas with new content related to security, cloud, data-center and operational concerns and troubleshooting. There is also a greater emphasis on wireless networking and VoIP. Use this white paper to help you gain an overview of what's new and what's different.

What's New in IP Office Manager Release 9.1

White Paper | May 26, 2015

Avaya introduced IP Office Manager Release 9.1 on December 22, 2014. As we all know from working with IP Office Manager, every new release brings changes to its GUI. Use this white paper to help you prepare to install and administer IP Office Manager 9.1.

What Kind of Network Am I On?

Article | March 01, 2012

Good question! There are lots of networks, so I’m sorry to say that it depends. Let me explain. The smallest computer-based networks are usually PANs or Personal Area Networks. They can connect a wireless keyboard, mouse, or other devices to a computer. You may find them wirelessly linking a printer to your computer. You may have noticed these all include wireless connections. A PAN most often uses wireless technologies like infrared and Bluetooth, so it is really a WPAN (Wireless Personal Area Network).

What is Twisted Pair and Does It Work?

Article | June 12, 2012

“Twisted Pair” is another way to identify a network cabling solution that’s also called Unshielded Twisted Pair (UTP) and was invented by Alexander Graham Bell in 1881. Indoor business telephone applications use them in 25-pair bundles. In homes, they were down to four wires, but in networking we use them in 8-wire cables. By twisting the pairs at different rates (twists per foot), cable manufacturers can reduce the electromagnetic pulses coming from the cable while improving the cable’s ability to reject common electronic noise from the environment.

What is the Difference Between Bridges, Hubs, and Switches?

Article | Aug. 14, 2012

The most obvious difference is that hubs operate at Layer 1 of the OSI model while bridges and switches work with MAC addresses at Layer 2 of the OSI model. Hubs are really just multi-port repeaters. They ignore the content of an Ethernet frame and simply resend every frame they receive out every interface on the hub. The challenge is that the Ethernet frames will show up at every device attached to a hub instead of just the intended destination (a security gap), and inbound frames often collide with outbound frames (a performance issue).

What is the Cisco UCS Manager?

Article | Feb. 01, 2012

The Cisco UCS is truly a “unified” architecture that integrates three major datacenter technologies into a single, coherent system: Computing Network Storage Instead of being simply the next generation of blade servers, the Cisco UCS is an innova­tive architecture designed from scratch to be highly scalable, efficient, and powerful with one-third less infrastructure than traditional blade servers.

What is Project Quality Management?

Article | April 10, 2017

Modern quality management and project management are complementary. They both emphasize customer satisfaction and the underlying belief that quality leads to customer satisfaction. The main objective in quality management is making sure that the project meets the needs it was originally created to meet—nothing more, nothing less. In other words, to ensure quality, you must meet the needs of the stakeholder.

What Is Multiplexing?

Article | Aug. 22, 2013

Multiplexing is the technology that is able to combine multiple communication signals together in order for them to traverse an otherwise single signal communication medium simultaneously. Multiplexing can be applied to both analog and digital signals. A benefit of using multiplexing, or muxing, is reducing the physical hardware cost for expensive dedicated network communication segments, such as copper or fiber cables.

What is a LAN and Four Other Types of Area Networks

Article | March 05, 2021

Learn about the five types of area networks.

What is a Service Portfolio?

Article | Nov. 14, 2012

ITIL describes a service portfolio as a collection of the overall set of services managed by a service provider. A service portfolio describes a service provider’s boundaries and promises across all of the customers and market spaces it serves. I like to think of a service portfolio as describing the past, present, and future collection of services offered by a service provider. The figure below shows a high-level view of a service portfolio.

What Happens if I Have More Than One Switch With Redundant Links? Part 2

Article | Oct. 18, 2012

Now that the network is installed, each switch has a bridge ID number, and the root switch has been elected, the next step is for each switch to perform a calculation to determine the best link to the root switch. Each switch will do this by comparing the path cost for each link based on the speed. For paths that go through one or more other switches, the link costs are added. The switch compares this aggregate value to the other link costs to determine the best path to the root switch.

What Happens If I Have More Than One Switch With Redundant Links?

Article | Oct. 11, 2012

That depends on their configurations. For example: While it makes very good sense to include redundant physical links in a network, connecting switches in loops, without taking the appropriate measures, will cause havoc on a network. Without the correct measures, a switch floods broadcast frames out all of its ports, causing serious problems for the network devices. The main problem is a broadcast storm where broadcast frames are flooded through every switch until all available bandwidth is used and all network devices have more inbound frames than they can process.

What DMVPN Is and Why We Should Care

Article | April 03, 2014

According to Cisco marketing, Dynamic Multipoint VPN (DMVPN) “will lower capital and operation expenses, simplifies branch communications, reduces deployment complexity, and improves business resiliency.” Okay. But what is it, really, and why should we care?

What BI Architects and Admins Need to Know about SAP BusinessObjects BI4

Article | Jan. 12, 2016

I’d like to share some best practices for training BI administrators and architects in your organization. Because they will ultimately lead a major BI upgrade, administrators need training before a major project begins, not a few days or weeks before a go-live like other stakeholders. While there are many facets to upgrading your SAP BI system, I’m focusing on the need for BI architects and administrators to understand the BI4 platform’s new tools, new architecture and new monitoring capabilities.

What’s the Value of an AWS Certification?

Article | Feb. 03, 2015

Our IT Skills & Salary Survey revealed the average AWS certified salary was over 100k - how's that for AWS certification value? Read on for more!

What’s the Difference Between Hubs, Switches & Bridges?

Article | Dec. 17, 2020

The key difference between hubs, switches and bridges is that hubs operate at Layer 1 of the OSI model, while bridges and switches work with MAC addresses at Layer 2 of the OSI model.

What’s the Difference Between High Availability and Fault Tolerance in VMware vSphere?

Article | Dec. 30, 2014

What’s the difference between high availability and fault tolerance in VMware vSphere? This article elaborates on first configuring high availability and then layer on the fault tolerance capability. Learn more.

What’s Next For Your Azure Certification Journey

Webinar – Recorded | Dec. 06, 2018

The way Microsoft certifies Azure skills has changed. In this recorded webinar, we’ll cover what these changes mean for your Azure Certification path.

What’s in a CSI Register?

Article | June 14, 2013

ITIL is generally not prescriptive. In reality, the CSI Register at any given organization might look significantly different than the example given in the CSI book. The fields given in this example are important. 

What You Should Learn from the SolarWinds Attack

Video | March 29, 2021

A career in Cybersecurity means being a lifelong learner. New attacks are constantly being invented, and cybersecurity engineers must respond to them in new ways. This video introduces a new supply chain attack, which provides a fascinating glimpse into the incredible skills of state sponsored professional hackers.

What You Should Learn from the SolarWinds Attack

Article | March 25, 2021

The SolarWinds cyberattack is one of the most sophisticated and broad cyberattacks in history and will likely be studied for years by cybersecurity researchers as a case study for a supply chain attack. 

What You Need to Know Before Implementing Infrastructure as a Service (IaaS)

White Paper | Oct. 05, 2015

The advantage--and disadvantage--of IaaS cloud computing is complete control. The user is responsible for sizing, installing, and maintaining operating systems and applications, backing up the systems, etc. This enables the user to configure everything in an optimal way for the workloads that need to be accomplished, but it requires time and effort to determine how it should be set up, secured, etc. With the goal of providing a good place for you to start your IaaS implementation and highlighting some areas that you should plan for and design for, Global Knowledge instructor John Hales provides a review of IaaS, as well as insight into what you need to know before implementing IaaS. He also shares a laundry list of things to consider when implementing IaaS, including questions to ask yourself, your company and your potential cloud provider.

What You Don't Know About Cybersecurity CAN Hurt You

Webinar – Recorded | Oct. 21, 2014

The bad guys just keep getting better! No matter how much patching and tweaking we do, the bad guys' constantly changing tactics and techniques continue harming our networks, stealing and damaging data, and just generally screw things up. What motivates someone to do such terrible things in the first place? How have these hackers changed and improved? What kinds of attacks are popular now and why? In this hour-long webinar, security expert, former hacker and Global Knowledge instructor Phillip D. Shade will provide insight into understanding the latest hacking techniques, what the current threat landscape looks like, and suggested countermeasures to mitigate threats. He will include specific examples of the current threat landscape, including data mining, social engineering cyber threat terminology, man-in-the- middle attacks and Denial of Service (DoS) attacks.

What to Consider When Implementing Software as a Service (SaaS)

White Paper | Jan. 07, 2016

There are many considerations in deciding on whether to provide Software as a Service (SaaS) to others or whether to become a consumer. This white paper will explore what questions and factors you should keep in mind as you seek to implement SaaS. Considerations include deciding how your application will be accessed, implementing disaster recovery, scheduling platform maintenance and upgrades, handling service outages and creating a security plan. This knowledge can be useful whether you are provider of SaaS applications or are planning to be a consumer using software for activities like accounting or project management.

What to Consider When Implementing Platform as a Service (PaaS)

White Paper | Oct. 09, 2015

There are many questions you should ask before selecting your PaaS provider. Learn what you need to know in order to compare and contrast PaaS with the other offerings like IaaS and SaaS, and what they require in terms of setup and configuration. As with any decision involving IT infrastructure there are many variables that should be considered to ensure you find a solution that will fit your current and future needs, budget and support requirements.

What Separates a Good Cloud Engineer from a Great One

Article | Feb. 16, 2021

The cloud has been around for over a decade, but great cloud engineers are in short supply. What sets a great cloud engineer apart from simply a good one? Experience plays a big part, and the general expectation seems to be that you will become great by putting in your time. However, the truth is that to be a great cloud engineer you do not just slowly grow into your role. You actively aim for ways to improve both your skills and your approach to using technology. Here are three examples of what great cloud engineers do to be highly successful.

What Separates a Good Cloud Architect from a Great One?

Article | Dec. 16, 2020

Let's start with defining the job of a cloud architect. You are responsible for planning, designing, migrating, and implementing cloud-based infrastructures, but the effectiveness of these specialists is not guaranteed.

What is the Difference Between Ethernet II and IEEE 802.3?

Article | Jan. 12, 2022

To understand the difference between Ethernet II and 802.3, you first must know how Ethernet works. While Ethernet cables transmit data, their role is relatively simple compared to that of the Ethernet card — also referred to as an adapter. It’s within the function of this card that you find the differences between Ethernet II and 802.3.

What is Supplier Management?

Article | Jan. 30, 2013

Organizations that plan for and conduct supplier management according to defined processes and boundaries are more likely to receive predictable, high-quality goods and services from their suppliers in a timely manner.

What is Software-Defined Networking?

Article | Jan. 15, 2019

Software-defined networking (SDN) is a solution that will enable your organization to meet the demands of network programmability and automation. The result will be greater network agility to support new applications while complying with increasing security needs.

What is Project Quality Management?

Article | Oct. 07, 2020

Project quality management is the process of determining the quality standards that are applicable to a project and devising a way to satisfy them. Learn more here.

What is Malware, Ransomware, and Social Engineering

Video | Oct. 08, 2018

Networks are under attack as hackers try to access systems to compromise or steal sensitive data and information. Understand the threats posed by malware, ransomware and social engineering.

What is Cryptojacking and How Can I Protect Myself?

Webinar – Recorded | Feb. 02, 2018

Driven by recent increases in cryptocurrency values, Cryptojacking is poised to be the center of conversation in 2018. It’s one of the latest innovations in hacking in which a victim’s computer is enlisted to mine cryptocurrency. Unlike ransomware, this attack steals processor cycles in an attempt to mine Monero and other currencies, typically without the user’s knowledge or consent. Watch this timely 1-hour webinar where we will discuss – A quick overview of cryptocurrencies. A walk-through of a typical attack. The economics of the attackers. Possible mitigation strategies to keep you and your organization safe. With miners trying to take advantage of the rising cryptocurrency industry, join us as we investigate this cyber-crime and learn how you can protect yourself and your organization. View our complete Cybersecurity curriculum for courses that help you build fundamental to advanced cybersecurity techniques, prepare for top industry-recognized certifications or master product-specific skills.