Fundamentals of SIP

The Session Initiation Protocol (SIP) is an IETF-defined signaling protocol, widely used for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP). That the definition of SIP according to Wikipedia. This definition is only the beginning, as SIP is a very complex protocol.

You can check IETF RFC, Wikipedia, Cisco.com for details, but most probably you’ll not remember too much about SIP, except if you are dealing with this protocol daily in your work field. As a network engineer you should know at least what is SIP and what it does, so here is a short video that explain SIP fundamentals:



Virtual WAN Optimization – Blue Coat presentation

Chris Webber from Blue Coat Systems describe the concept of virtualing WAN Optimization and WAN Acceleration systems. Of course that, since Blue Coat Systems is involved, you can consider this video presentation a little bit of marketing strategy, but if you think to this subject, all companies out there do the same. It’s somehow normal.

Skipping the marketing part, this is a good explanation about virtualized WAN Optimization and you can have an overall view of what this means and how it can be implemented. Information is always welcome, not matter from which source, so I would recommend you to spend 10 minutes and watch this video.


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The difference between 3G and 4G

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Excellent explanation about what is 3G and 4G, speed of the download  and different generation of wireless technologies by Craig Mathias.


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Free live webinars covering the new Wireshark certification

What should you study? How should you study? What are the hot areas on the Exam? What are the Exam question formats? What should you watch for? What if you need to reschedule the Exam? What can you bring with you?

This are the questions that Laura Chappell will try to answer in the 4 free live webinars hosted at Chappell Seminars on from 17th to 19th of August 2010. I you are curious who is Laura Chappell, you should know that, according to her bio, she is the Founder of Wireshark University (www.wiresharkU.com) and Chappell University (www.chappellU.com) and a self-admitted “packet geek” as well as a highly-energetic speaker and author of numerous industry titles on network communications, analysis and security. Nicknamed “Glenda, the Good Witch,” Laura has presented to thousands of State, Federal and international law enforcement officers, judicial members, engineers, network administrators, technicians and developers.

Ms. Chappell is a member of the High Technology Crime Investigation Association (HTCIA) and an Associate Member of the Institute for Electrical and Electronic Engineers (IEEE) since 1989. Her blend of humor, personal experiences, energy and clarity have earned her a top spot as an industry speaker at Microsoft, Novell, Hewlett-Packard, High Technology Crime Investigation Association and US Court conferences.

I believe that this is enough to wake up your interest in this event. Considering that it is offer for free, I don’t see why you should not attend especially if you are interested in network technology. There is always room for more knowledge.

Sign in for this event

Cisco Network Magic – funny marketing video

Not too much to say about. We all know that Cisco is investing a lot into it’s image on the market and sometimes we are dissapointed that what marketing is showing is different from the final product, but the next video worth every penny. At least is funny and can bring a smile on your network engineer face.

Enjoy!


10 excuses you should avoid telling to your boss

I know, it’s not technical or related to Cisco, but it has everything to do with the industry in which we are network engineers are working. I found this great article by Justin James about the top 10 excuses a boss does not want to hear and I think it’s a good opportunity to share if with you. So look here what he’s saying:

“There are lots of reasons why a project might not be going well or may even fail. When your boss wants to know why, there is a world of difference between offering an excuse and providing a legitimate reason. In truth, most excuses only make your manager more upset and put the blame on you. Here are 10 common excuses that employees give their managers — and how you can turn them from weak excuses into a way of getting your supervisor to help you resolve the problems before your project is jeopardized.

1: I didn’t understand the assignment

Not every boss has great communication skills. And yes, having a manager who is not good at explaining what needs to be done makes life difficult. At the same time, using your boss’ inability to explain things as an excuse for not doing them just does not fly. If an assignment does not make sense, it’s your responsibility to find out what really has to happen. And if you find yourself in this situation more than once, it is a sign that you need to be extra careful when working with this particular person to get things fully understood.

2: The deadline was impossible

We all know this situation: A manager hands you an assignment with a deadline attached to it. You tell the manager that the deadline can’t be met and you’re told, “I don’t care; make it happen.” When the deadline is missed, you say, “But I told you the deadline was impossible!” and the boss is still angry. The disconnect here is that simply saying that the deadline is not possible is not good enough. As soon as the boss tells you to do it and you passively accept the ridiculous deadline, you make it your responsibility to meet it.

Your best defense is to negotiate a better deadline, and to do that, you need a project plan. The fact is, you always should be able to paint a picture of what a project will entail with some broad strokes anyway, and it is fairly easy to assign some rough estimates of the time to make each step happen. When you show your supervisor that even the most optimistic rough draft of a plan that omits a million minor details shows that it will take three months and they are demanding three weeks, guess what? It is now your manager’s responsibility to deal with the deadline issue. You have turned an opponent into an ally, and no sane boss can hold you accountable for the bad deadline anymore.”

Read the rest of the article here