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Which Exams to Take: CCNA Composite vs ICND1 and ICND2

Video | Feb. 25, 2014

Global Knowledge instructor Kevin Schweers reviews the basic differences between the two paths to achieving CCNA certification.

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.

VLANs and Trunks

White Paper | June 11, 2015

When properly utilized, VLANs and trunks provide flexibility, stability and ease of troubleshooting. This paper provides technical details about VLANs and trunks, along with design options at a basic to intermediate level. Recommendations and commands are included throughout.

UCS Troubleshooting Boot Camp

Video | Aug. 15, 2013

John Barnes, Global Knowledge's Cisco Course Developer, discusses enhancements to our UCS Troubleshooting Boot Camp and suggestions for students in preparation for this course.

Three Key Strategies for Preventing Problems with IBM WebSphere Business Process Manager V8.5

White Paper | Oct. 12, 2015

A major challenge of problem determination is dealing with unanticipated problems. It is much like detective work: finding clues, making educated guesses, verifying suspicions, and other considerations. An ideal strategy for problem prevention is to monitor the system regularly. Use the strategies outlined in this paper to minimize downtime and detective work so you can maximize performance.

The Intersection of DevOps and ITIL®

White Paper | July 07, 2015

Change is the order of the day, and if anything, the pace of business and technology change is accelerating. The business and customers are looking to IT service providers to be more responsive, delivering more frequent service changes with higher quality-resulting in services that deliver more value to the business. In order to continue to be relevant and of high value, ITIL must continue to benefit from other complementary best-practices for IT. DevOps, an approach that encourages improved communication, collaboration, and teamwork across development and operations, can have a positive influence in improving ITIL processes across the service life-cycle.

The Basics of Configuring and Using Cisco Network Address Translation

White Paper | July 31, 2014

While the Internet uses IP addresses assigned by an Internet authority such as the American Registry for Internet Numbers (ARIN), there are too few of these numbers to uniquely identify the millions of computers and computing devices in the world. Therefore, most enterprises use private addresses which allow them to identify the aforementioned computers. Of course, these IP numbers cannot be allowed on the Internet because all private networks use the same ones so there would be vast overlapping of addresses, and the addresses are not compliant anyway. Therefore, it is necessary to change the identity of a private host to a legal public host. This process is called Network Address Translation (NAT) and may be implemented on Cisco firewall products and Cisco routers. The firewall device(s) at the Internet demarcation point is by far the more popular way to implement NAT, but routers are used in small offices or small-to-medium-sized networks in which a separate firewalling solution is not possible or affordable. The focus of this paper is on the router-based NAT solution.

Switching Operations

White Paper | June 05, 2015

Switches play a vital role in moving data from one device to another. Specifically, switches greatly improve network performance, compared to hubs, by providing dedicated bandwidth to each end device, supporting full-duplex connectivity, utilizing the MAC address table to make forwarding decisions, and utilizing ASICs and CAM tables to increase the rate at which frames can be processed.

Policy-Based Routing: What Is It and How Is It Used?

Article | Jan. 08, 2015

What is policy-based routing? PBR is the process of using a route map to match on something more than the destination and then defining the path out of the router based on those conditions. Learn more here!

Network Layer Utilities: End-to-End Data Delivery

Article | Aug. 22, 2009

Find out which OSI layer is concerned with reliable end-to-end delivery of data - and more. Get answers to your OSI reference model and network layer questions here.