This Week I Learned - Week #292

This Week I Learned -

* The X-Frame-Options header is a security feature enforced at the browser level. Sites can use this to avoid clickjacking attacks, by ensuring that their content is not embedded into other sites. X-Frame-Options: SAMEORIGIN causes the browser to refuse to render the content in a frame.

* Some pages are currently not transcoded by Google Web Light, including video sites, pages that require cookies (such as personalized sites), and other websites that are technically challenging to transcode. In these cases, you will see a "not transcoded" notification. Site owners who don't want to have their pages to be transcoded should set the HTTP header "Cache-Control: no-transform" in the page response.

Device Mode is the name for the loose collection of features in Chrome DevTools that help you simulate mobile devices.  Think of Device Mode as a first-order approximation of how your page looks and feels on a mobile device.

Light Web-Pages (LWP) is a mechanism for redirecting users automatically to the lighter versions of the web-pages they visit. LWP as a mechanism to serve AMP pages without relying on Google, you can use LWP to serve any web-page that you deem to be the lighter version of another. Another significant difference is that while AMP focuses on mobile devices only, LWP embraces both mobile and desktop users

* The learning curve is steep for Angular while React, and Vue’s provide faster development times and quicker debugging solutions. For inexperienced JavaScript developers who have primarily worked with jQuery previously, using Vue is a lifesaver as it resembles plain JavaScript with the introduction of existing ideas - Angular vs. React vs. Vue: A 2018 Comparison

* A light weight YouTube Player - Essential YouTube

* Amazon’s Consumer business has turned off its Oracle data warehouse Nov 1 and moved to Redshift. By end of 2018, they'll have 88% of their Oracle DBs (and 97% of critical system DBs) moved to Aurora and DynamoDB - Andy Jassy

Azure Site Recovery Deployment Planner tool provides the following details:
- Compatibility assessment
- Network bandwidth need versus RPO assessment
- Azure infrastructure requirements
- On-premises infrastructure requirements
- Estimated disaster recovery cost to Azure

Front Door is an entry point into the Microsoft WAN that is deployed in edge sites around the world. You can think of Front Door as global load balancing, but it is doing more by enhancing performance.  Additional services are also offered:
- URL redirection
Session affinity
SSL termination
Security via customer WAF rules and DDoS protection
URL rewrite
IPv6 and HTTP/2 support  

Firewall options in Azure -
- Network Security Groups (NSGs): A Layer-4 policy that is associated with subnets in a virtual network (VNet).
Web Application Firewall (WAF): A Layer-7 firewall for HTTP and HTTPS services that are deployed on the Medium or higher sizes of the Azure (Web) Application Gateway.
Network Virtualization Appliances (NVAs): Linux virtual machines that contain firewall software from third-party vendors such as CheckPoint, Watchguard, Cisco, and so on.
Azure Firewall - new Azure firewall service. Unlike NSGs, Azure Firewall is intended to be a centralized deployment. And unlike the WAF, Azure Firewall is not instance-based; it operates as a true PaaS feature and doesn’t bother you with worrying about deployed instances. Instead, the Azure Firewall automatically scales under the covers to deal with your workloads. And unlike NVAs, you won’t need to license a third-party service to use the WAF.

* IBM acquired cloud infrastructure provider Softlayer in 2013 for $2 billion, and the Weather Channel's data assets for more than $2 billion in 2015. It also acquired Canadian business software maker Cognos in 2008 for $5 billion. Microsoft this year acquired open source software platform GitHub for $7.5 billion. Chip maker Broadcom Inc agreed to acquire software maker CA Inc for nearly $19 billion; and Adobe Inc agreed to acquire marketing software maker Marketo for $5 billion. One of IBM's main competitors, Dell Technologies Inc, made a big bet on software and cloud computing two years ago, when it acquired data storage company EMC for $67 billion. As part of that deal, Dell inherited an 82 percent stake in virtualization software company VMware Inc. The deal between IBM and Red Hat for $36 billion is expected to close in the second half of 2019. 

* Red Hat takes open source software and hardens, tests, and certifies it for use in mission-critical computing.

* XKCD creator Randall Monroe wrote the book Thing Explainer using simple words. If you want to write using only simple words, try his writing checker you can use: xkcd.com/simplewriter

* Android uses a Linux kernel, but has extra libraries, a GUI, and some proprietary code.

* Gartner defines a digital experience platform (DXP) as an integrated software framework for engaging a broad array of audiences across a broad array of digital touchpoints. Organizations use DXPs to build, deploy and continually improve websites, portals, mobile apps and other digital experiences. The experience quickly moved beyond just content, and just the web - businesses want to share any type of asset, or group of assets, across any digital touchpoint - online, in-store, billboard, kiosks, customer portals, ecommerce systems, and more. A CMS provides version management and authoring workflow to keep large, global sites consistent. Web Content Management (WCM) is more or less another name for CMS. This need for a connected, consistent experience - both internal and customer facing - led to the rise of the agile DXP. The core principles of CMS, version management, workflow, authorization and content organization, are still fundamental to creating a digital experience.

* When a user asks a question in Google Search, Google  might show a search result in a special featured snippet block at the top of the search results page. This featured snippet block includes a summary of the answer, extracted from a webpage, plus a link to the page, the page title and URL. The summary is a snippet extracted programmatically from what a visitor sees on your web page. What's different with a featured snippet is that it is enhanced to draw user attention on the results page. When Google recognizes that a query asks a question, it programmatically detects pages that answer the user's question, and display a top result as a featured snippet in the search results.

Krishna Trilok is the son of renowned ad filmmakers Sharada and Trilok Nair, who had earlier collaborated with Rahman for several popular commercials.  Sharada introduced Rahman to her cousin (Mani Ratnam) who was so impressed that he signed him for Roja (1992)

* Whole Foods is dubbed “Whole Paycheck” because of its relatively high prices....Whole Foods helped pioneer the large-scale selling of natural and organic groceries with its 465 stores - LA Times

An important part of any scientific discovery is that others are able to duplicate the conditions of a test and obtain the same results.

* I like how Vocabulary.com goes beyond being just a dictionary...Sample -
..if you patronize a person, you talk down to them like a father might do to his child or a master to his apprentice. If you want to take an advanced class and your advisor warns you of all the hard work, you can tell him to stop patronizing you — you know a hard class involves hard work. This sounds much better than saying, "I'm not stupid!"

Dietary cholesterol is absorbed differently in each person, so it’s hard to say what that perfect number is for sure.

* The three single sugar molecules, referred to as monosaccharides, are glucose, fructose, and galactose. These single sugars combine with each other to form disaccharides, which are sucrose, lactose, and maltose. These can occur naturally in fruits (fructose), veggies, milk, and milk products (lactose). This category also includes sucrose or table sugar. Complex carbs, on the other hand, are comprised of many sugar molecules. Starch and fiber are considered complex carbs. Starch can be found in veggies, grains, beans, and peas - Go Ask Alice!

* Theodor Geisel, better known as Dr. Seuss, ..dreamed up many of his amazing creations in a lonely bell tower office that he had in the back of his house in La Jolla, California. And he was actually afraid to meet the young children who read his books for fear that they were expecting him this kind of jolly Santa Claus-like figure and would be disappointed with his more reserved persona.

* Shyness is about fear of social judgment. Introversion is more about, how do you respond to stimulation, including social stimulation. So extroverts really crave large amounts of stimulation, whereas introverts feel at their most alive and their most switched-on and their most capable when they're in quieter, more low-key environments - Susan Cain, author of Quiet: The Power of Introverts in a World That Can't Stop Talking who took seven years to write

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