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Trivia Tuesday this week was about Cisco DevNet’s anniversary. Along with that anniversary, today marks the 57th anniversary of the US debut of a television series that, arguably, has impacted many aspects of the world. Technological ideas such as ha...


I’ve been using computers long enough to appreciate the economic value of data storage that we see today. My first experience with computers at home relied on tape drives to store programs and data. I still remember getting upset with my brother who ...


  What is Cisco DevNet? A website,, that provides free-to-use learning and sandbox environments? A community of over 600,000 developers? A place to help developers and IT professionals write applications and develop integrations ...

yawming by Cisco Employee
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The term "linter", which is any static analysis tool that inspects code to flag programming errors, syntax issues, and potential suspicious constructs, originates from who?A. Douglas CrockfordB. Nicholas C. ZakasC. Stephen C. JohnsonD. Scott Hanselma...


I don’t use social media frequently and I haven’t been paying attention to the Apps on my phone lately. A couple of days ago I found out there is a  on my phone and initially though that the WiFi provider, Xfinity , had altered its design. However, ...

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yawming by Cisco Employee
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CQ CQ. The internet is down, and cell phones aren't working. What can we do? Oh no, we don't even have a landline anymore! If this were to happen, it would indeed be like an SOS. Mayday, Mayday! The day would no longer be fun. Don’t worry; if such a...

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yawming by Cisco Employee
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Regarding network automation, we have many different choices of programming languages from which to choose. Some languages have been around for decades, like Perl, and those that are relatively new, such as Go. Which one to use will most likely be de...


Usually, the heated debate regarding tabs versus spaces is mostly ignored as silly, programmer fodder. However, in this rare instance, spacing and indentation DO matter in this data serialization language!  YAML stands for YAML Ain’t Markup Language...

atacke by Cisco Employee
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A story as old as time.... For a quick online check of whether or not DNS is the issue, you can use Is it DNS? To learn more about DNS, the unsung hero sometime infamous troublemaker of networking, see It's Always DNS: The Unfortunate Truth. Don't f...


The new way to code is here. Sudoku is a popular puzzle game. The objective is to fill a 9x9 square grid, divided into smaller 3x3 boxes, with digits so that each column, each row, and each of the nine 3x3 blocks that compose the grid contain all of...

yawming by Cisco Employee
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  Exactly 15 years ago, on July 28, 2008, the world witnessed a fascinating astronomical event known as the "Great Selenelion." During a lunar eclipse, which typically occurs when the Earth passes between the Sun and the Moon, a rare and incredible ...

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davidn# by Cisco Employee
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