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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.

Here are five date points from the 2020 IT Skills and Salary Report that illustrate important trends in professional development, skills gaps, hiring and top-paying certifications.

Here are 18 certification options, in no particular order, that are worth your effort based on site searches, feedback from subject matter experts and data in the Global Knowledge 2019 IT Skills and Salary Report.

An quick fundamental overview of layer two devices.   To learn more about this and similar topics, enroll in our exclusive Understanding Networking Fundamentals course.    

The 2021 revised and updated version CISSP (Certified Information System Security Practitioner) certification exam will be released on May 1, 2021. This new version of the popular CISSP exam will include a modest revision and re-organization of previously included topics, but will integrate a significant number of new topics.

For organizations getting started with RHEL, Red Hat Training has developed a series of courses to develop the skills needed for basic administration and configuration of Red Hat Enterprise Linux. These courses introduce key command line concepts and enterprise-level tools, laying the foundation for the rapid deployment of Red Hat Enterprise Linux. The curriculum also introduces the basic administration skills needed for resolving configuration issues and integrating Red Hat Enterprise Linux systems with other existing environments. View the slide deck>>

Every second of every day, data is being sent and received. Billions of data packets are processed by your company’s network every day. In fact, you received dozens of packets just to read this article, but the vast majority of us have no idea how this works. People have no clue as to what goes on behind the scenes to ensure data actually gets to the right device.

This webinar focuses on addressing the issues of an unsecure campus network and how to address the insecurity with 802.1X. We then will look at how Cisco ISE can centralize campus access with 802.1X. View the slide deck>>

This webinar will focus on addressing the issues of an unsecure campus network and how to address the insecurity with ISE. We then will look at how Cisco ISE can add security to devices beyond initial connectivity. View the slide deck>>

This Webinar will focus on addressing the issues of an unsecure data center network and how to address the security concerns with Cisco ACI. The key components of how to create an ACI whitelist will be covered. View slide deck>>