Devops sources and important links must known for a engineer

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Set up your VOIP based SIP soft phone and know more about VOIP

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VOIP (Voice over internet protocol)        The  trending technology of present and near future. I have spent months of efforts on voip , its a huge topic so to minimize your time and also to refresh my voip skills , I have decided to write this blog. Main Topics covered :- SIP (session initiation protocol) ASTERISK (open source voip server platform)     SIP is a part of Application layer (fig1) in TCP/IP , its major function is to initiate/terminate a sip session and transfer it to TCP/UDP for transmission. In simple terms it holds the FROM and TO addresses in a post , the rest is carried using TCP/IP protocol.  fig1 : SIP in TCP/IP The basic operation of SIP is an INVITE and ACK via proxy, once the opposite Sip phone B accepts the call, a media session is established. Its simple as shown in fig 2. The proxy might be a VOIP services provided by certain websites such as   www.linphone.org ,  SIP2SIP.info  etc or it...
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Front End Developer Interview quiestions- All in single blog

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Data Science v/s Data engineer v/s Data Analyst

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Data Scientist A data scientist is the alchemist of the 21st century: someone who can turn raw data into purified insights. Data scientists apply statistics, machine learning and analytic approaches to solve critical business problems. Their primary function is to help organizations turn their volumes of big data into valuable and actionable insights. Indeed, data science is not necessarily a new field per se, but it can be considered as an advanced level of data analysis that is driven and automated by machine learning and computer science. In another word, in comparison with ‘data analysts’, in addition to data analytical skills, Data Scientists are expected to have strong programming skills, an ability to design new algorithms, handle big data, with some expertise in the domain knowledge. Moreover, Data Scientists are also expected to interpret and eloquently deliver the results of their findings, by visualization techniques, building data science apps, or narrating interes...
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