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Root Bridge for CCNA and CCNP, Part 1

As a CCNA / CCNP candidate you are expected to understand the purpose of the Root Bridge and how it is elected. The first role which the spanning-tree protocol needs to elect is which switch device on your LAN will act as the Root Bridge, or as I like to refer to it “The reference point.” Each spanning-tree protocol enabled switch will commence the election of the reference point by issuing out of all live ports a frame called a BPDU (Bridge Protocol Data Unit), within this frame are details regarding the transmitting switches spanning-tree credentials…

Access Control Lists Primer

When I ask my CCNA classes the question “what is an ACL?” not surprisingly I get the answer “to filter traffic!” I used to also believe this was the purpose of an ACL when I first encountered one.

Spanning Tree Primer

What is spanning-tree, what is the purpose of this protocol, where does it work? These questions are easy to answer, spanning-tree is a layer 2 ethernet loop prevention protocol which operates on Ethernet switches, there that’s it, nothing else stop. That’s all that spanning-tree does.

Network Address Translation Primer

What is NAT? The quick answer is this: To replace one L3/L4 address with another. That’s it, that’s the purpose of NAT, but why would anyone one want to do this?

OSPF Network Types: Broadcast

When you build a routed network using OSPF as your routing protocol of choice you have to take into consideration the fact that OSPF will automatically detect the Layer 2 encapsulation type and adopt one of 6 ways to operate on that link. This Broadcast mode is the default state that OSPF will set an interface to when OSPF detects the encapsulation type being Ethernet and will consider this media as broadcast media If you turn on OSPF over a Frame-Relay network and were to change the network type to “broadcast” then it would be wise…

OSPF Network Types – Non Broadcast

When you build a routed network using OSPF as your routing protocol of choice you have to take into consideration the fact that OSPF will automatically detect the Layer 2 encapsulation type and adopt one of 6 ways to operate on that link. The first of these 6 behaviours which we will cover is OSPF Non-Broadcast mode This Non-Broadcast mode is the default state that OSPF will set an interface to when you execute the command “encapsulation frame-relay” on a serial interface. OSPF will consider…

Help for Internationally-Trained IT Professionals, New to Canada

When you planned on immigrating to Canada, you might not have considered the challenges of getting your Information Technology credentials recognized and finding a job in the field. You may have arrived in Canada with several years of hands-on experience and internationally-recognized professional qualifications. But after your first job interview, you probably realize that Canadian experience and international credentials are the stumbling blocks you’d have to overcome to find employment in IT. After sending out dozens of resumes, browsing job websites over and over, and going to a series of interviews, you may find the world becoming pretty depressing. But there is help. The following steps, gathered from experience, will help you to overcome the obstacles, and find the IT job you’re looking for in Canada.

Understanding Laws Affecting Product Introduction – Get Forearmed With the RIGHT Information

US Federal and international laws, as well as industry standards, are changing. New product innovations and market entrants need to stay abreast of these to contribute to their company and product successes.

EMC Testing: What Is It and Why Is It Important?

Engineers want to test their product at least once for electromagnetic compatibility or EMC. This procedure uses a single set of standards and placing a mark on the product to allow them to be sold in various countries.

Microsoft Training Online Can Change Your Business

Microsoft training online includes the whole suite of software programs like Word, Excel, PowerPoint, Access and more. As a business owner you may find that you need to use all of these programs for different aspects of your business.

Credentials and Experience in the IT Sector

In any professional job interview, one’s educational credentials are considered among the most important hiring factors. In most job environments, meeting a minimum degree requirement such as a Bachelor’s degree is sufficient, but in many IT workplaces additional credentials such as professional certifications are a must.

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