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 [...]
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 [...]
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 [...]
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 [...]
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 [...]
It seems to me that Cisco want to compete with Apple on the touch screen devices market. The Cisco Cius product confirm this.
OK, skipping the funny part of this story, honestly I believe that Cisco is making efforts to take the (still) open part of the tablet devices market that is not so developed [...]
Today I’ve received an e-mail with the following content:
Dear Cisco Certified Colleague,
CCIE certifications are as popular as ever. A recent publication has listed both the CCIE and the CCIE Voice certifications in their top 10 IT networking list* and has cited both as highly sought-after by employers. If that’s not enough motivation [...]
Multiple vulnerabilities exist in the Cisco PGW 2200 Softswitch series of products and they are related to processing Session Initiation Protocol (SIP) or Media Gateway Control Protocol (MGCP) messages.
SIP is a popular signaling protocol used to manage voice and video calls across IP networks such as the Internet. SIP is responsible for handling all [...]
Cisco removed the Core Knowledge Questions section from the CCIE R&S and Voice Lab exams.
This sections STILL exist on CCIE Service Provider, CCIE Security, CCIE Storage Networking and CCIE Wireless Lab.
Please find below the official [...]
The Cisco CCNA Service Provider (SP) Operations certification and the written exam for the CCIE Service Provider (SP) Operations certification are now available.
The Cisco CCNA SP Operations certification targets entry-level students with a foundation of network operations skills in SP IP NGN environments required of associate-level operations personnel. Both the Supporting Cisco Service [...]
Let's say that you have a Cisco router that you use as console server to connect to your devices in the [more]
IP Prefix-List tricky question
A few days ago I did encounter a task in one of these preparation workbooks for CCIE R&S Lab which was very [more]
Packet header graphic representation
I was surfing the Internet in search of some good drawing representing packet header and I come across five [more]
Selective BGP Dampening and parameters tuning
Some time ago, I wrote about BGP Dampening and how this feature can improve the stability of the network. A [more]
I think all network engineers touched, if not used / patched, as least one time a fiber optic patch cord. [more]
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