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Which Is Easier to Configure: Cisco IOS or Juniper Junos?

Article | March 17, 2014

The short answer (and a common one in our industry): it depends. When comparing Cisco IOS with Juniper Junos, the decision to choose one over the other is difficult and often boils down to cost. Of course, there are other factors to consider.

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 a LAN?

Article | Sep. 12, 2017

If you’ve been around IT for even a few minutes, you’ve likely heard the acronyms “LAN” and “WAN” used by fellow technicians. But with all of the possible variations of networks—different sizes, different arrangements, and different protocols—how do you tell the difference between a LAN and a WAN and everything in between? The simple answer is one of scope and size.

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.

Top Cybersecurity Certifications to Enhance Your Career in 2019

Article | Oct. 04, 2019

Managers are in dire need of cybersecurity professionals with specific skills. If you’re looking to advance your career, or transfer into the cyber field, now is the time to get certified.

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.