Igeometry Podcast

Encryption is the process of scrambling data to protect personal files, secure communication, hide identities and much more.  In this video we will learn about the different type of encryptions we will talk about symmetric encryption, asymmetrical encryption, where they are used for and the pros and cons of each one.  Symmetric encryption Asymmetrical encrypt  Pros and cons of sym va asym  Symmetric encryption  Might as well just call it classic encryption I would argue and i think this is the first encryption known to us. I have some thing I dont want anyone to see I use a lock key to lock it. Only I can open it unless I have a lock.  The same key you use to encrypt is the same key to Decrypt.  Examples Examples of popular symmetric-key algorithms include  AES Twofish Serpent  DES Twofish, Serpent, AES (Rijndael), Blowfish  CAST5, Kuznyechik, RC4, DES, 3DES, Skipjack, Safer+/++ (Bluetooth), and IDEA  Asymmetrical encryptions  We had symmetric

  Bandwidth explained from software engineer point of view Bandwidth is measured by how many bits a device is allowed to send/receive in a second. It ranges from your internal network starting from network card all the way to your ISP Internet speed. In this video we will discuss the definition of bandwidth upload vs download speed, the different usage patterns for normal web browsing, streaming, gaming, media production and cloud web servers etc and finally we will show an example of the whole thing. When your ISP gives you 80Mbs download/1Mbs upload bandwidth, this means 80 mega bits download which means your router (and all your devices) can receive (download) a total of 80 mega bits in a second at a time, and it can send (upload) 1 mega bit in a second. With your ISP can you pick and choose your plan that fits your usage. Usage patterns Web Browsing Most people download far more than they upload. So the download bandwidth matter more than upload bandwidth. For simple web browsing the download incomin

  Denial of Service attacks Dos attacks (denial of service) are type of attack on a server to prevent users from consuming a particular service, usually this is an HTTP web server. This could happen by either saturating the bandwidth of the pipe going to the server or by bringing the server down to its knees so it stops taking requests all together. In this video we will learn about 3 different types of DOS attacks and explain each one by example.  Bandwidth based DOS 2:15 Dos Sending Huge amount of data to a server with lower bandwidth from a client with higher bandwidth which ends up saturating the server pipe and queue up future requests, new requests will have to wait or perhaps denied service. Example, the attacker have 100mb/s bandwidth (upload) the server has 10Mb/s download. If the attacker starts sending 100 mb worth of data to the server, it will take it 1 second to leave the pipe. However, The server can only download 10 mb each second for processing because thats its bandwidth, so it n

 TCP and UDP are communication protocols that allows us to send and receive data in a network. We have both for a reason since each has its advantages and disadvantages. In this video we will talk about two protocols, pros and cons of each one and will write tcp and udp server with nodejs showing you these in ACTION. coming up Code!  https://github.com/hnasr/javascript_playground/tree/master/tcp Jump Codes

  Get and POST are the most popular http methods used on the web. Each carries its own differences and properties. It can confusing to get to choose when to use POST over GET. In this podcast we will explain the differences, use cases and the benefits of using GET and POST.  --- Support this podcast: https://anchor.fm/hnasr/support

  Microservices (Explained by Example) Microservices technology is a new pattern of software engineering that has been popularized recently. In this video we will explain what microservices are, their pros and cons by example.  A lot of companies have moved in the early 2010 such as twitter and netflex to the microservices architecture.  Microservices technology is a pattern where you can break down big application into smaller services and what previously is a function call is now a network call GET or POST through HTTP. In order to explain what microservices are, we need to explain how a traditional classical application looks like. Here is an example .. Instagram   View Picture, list comments, likes and Picture and Location.  Picture Likes Comments Picture API (Thumbnails)  Likes API  Comments API Most popular comments Pros: Polyglot architecture  Easy scaling for microservices that needs scaling.  Better Team management, each microservice is a team Easier to innovate certain areas. Each microservice can p

Attribute Rules are scripts that can be authored and placed in the geodatabase to ensure data integrity lets discuss them.  --- Send in a voice message: https://anchor.fm/hnasr/message

In this episode we will talk about the difference between public ip and private ip address and casually talk about routers, modems, LAN,  WAN and port forwarding.  --- Send in a voice message: https://anchor.fm/hnasr/message

Join me in the upcoming Esri dev summit! Ill be presenting attribute rules and the utility network. --- Send in a voice message: https://anchor.fm/hnasr/message

It is a long weekend with the president day on Monday. Which means it is another good opportunity to create more art. Whether that is a new ArcGIS pro Add-in or a new map, a painting, a new piece of poetry or music. This also means more chances to get discovered, which means more chances to get criticized. I get criticized all the time now that I have bigger exposure and this is our topic for this podcast coming up,  --- Support this podcast: https://anchor.fm/hnasr/support

This is originally a video that I converted into a podcast I think it is still useful  https://www.youtube.com/watch?v=8D1NAezC-Dk Notifications have become part of our daily life. We receive them almost every minute on our phones, tablets, and computers. As software engineers, it is good to understand how notifications work, and what different type of notifications there are (push and pull notifications), the advantages and disadvantages of each.    In this video I'll explain how the push notification and pull notification works and the stateful vs stateless nature of each and how it affects the architecture decision of our application that we are building.    Online diagram tool used in this video:  Http://www.gliffy.com   Become a better software engineer by joining IGeometry checkout the other software engineering content on this channel   -Hussein --- Support this podcast: https://anchor.fm/hnasr/support

Soap (Simple Object Access Protocol) has been a popular messaging protocol in the early 2000s. It uses XML as a format with well defined schema, and your choice of stransport protocol. Despite it still being used people have been moving towards #REST architecture and more so #gRPC recently. In this episode we discuss why people moved from #SOAP and what are the advantages and disadvantages of SOAP.   Stay Awesome! Hussein Nasser --- Support this podcast: https://anchor.fm/hnasr/support

In this episode we answer a question from Anthony. How do you know when to focus on building a geodatabase (let's say SQL server database) rather than just let the data sit in the shapefile? I would say if you are planning to have multiple users accessing and editing the data, also if your data grew too large shape files might not be scalable to read. Also if you are planning to use the capabilities of Geodatabase such as domains, subtypes, attribute rules, versioning, archiving etc not to mention sharing as well. if you wont plan to use any of the above then shape file is a good choice. If you are planning to just maintain a shape file data of 10k or 100k features and you edit it yourself locally it works!  --- Send in a voice message: https://anchor.fm/hnasr/message

When you publish a service you can specify how many processes (min / max) your service can use. As requests are being served memory is allocated, state is changed, some processes could go corrupt Recycling is the process destroying and re-spawning processes that are running to maintain a good memory footprint.  Here is a good read on recycling http://enterprise.arcgis.com/en/server/latest/publish-services/windows/tuning-and-configuring-services.htm Enjoy Hussein --- Send in a voice message: https://anchor.fm/hnasr/message

 I don’t have the equipments. There are people doing that already. And my personal favorite, I don’t know enough.  Excuses are always there, In this podcast I talk about my personal story of how I got started. You don't need fancy equipments to share your skills and knowledge. In this podcast we discuss how with just a screen sharing app (Quicktime) and this microphone I was able to grow my youtube software engineering channel to 2000 subs and more than 1 million watch hours.   --- Support this podcast: https://anchor.fm/hnasr/support

A podcast about the difference between a layer and its data source. Enjoy! --- Send in a voice message: https://anchor.fm/hnasr/message

Vikrant asked a question on Linked:  Dear Hussein, I want to learn programming for GIS. Is python useful? I am not very good in programming. Kindly guide. And thanks for the posts.. Programming for GIS really depends on what you are trying to do and how do you want to advance your career. In this podcast we will discuss four kind of areas where you can programming for GIS. GIS Admin Programming GIS Desktop Programming GIS Web Programming  GIS Server Programming Enjoy --- Support this podcast: https://anchor.fm/hnasr/support

If you ever go a website and there some images you liked to reference in your page or blog. You would copy the link, and put in your blog.  Only to find out that the image looks broken?  You copy the link again and paste it in URL and it opens fine?  This is an effect of CORS or cross origin resource sharing.  https://husseinnasser.com/courses --- Support this podcast: https://anchor.fm/hnasr/support

 ArcGIS Server is a technology that allows you to pull your heavy work load on the backend and isolate the clients from complexity of the database by exposing HTTP services instead of low level TCP database. You can also extend the server capability by writing your own extensions.  In this episode ArcGIS Server talk we will talk about two ways you can extend your ArcGIS server, Server Object Extensions and Server Object Interceptors. Server Object Extension  Extends the MapServer to allow you to write your own logic that cannot be easily done by built - in Feature Server or Map server. Or it is more performant to do it.   Users create new excavation I want to auto-calculate the price of the excavation based on the soil type, whether there are trees, rocks.  Server Object Interceptors  You don’t write new thing you instead intercept existing calls to query and applyEdits to inject your own logic to pre or post processing. Lets say every-time any application tries to write to the s

Any content served through HTTP “should” include meta data about its type. This is so the browser/client knows what to do with the content it receives. For example, if the content type header is an image the browser will preview it, if it is HTML it will render the markup and execute any javascript code. Content type however is optional and web masters sometimes don’t set it, which leave the browsers wondering about the content type it is consuming. So browsers had to implement parsing and “sniffing” techniques to detect the type of content when a content type header was not served. However, this caused security problems and attacks that we explain in this video! So to prevent sniffing, web servers can return X-Content-Type-Options: nosniff which opts out browsers from sniffing the content. Media type: https://en.wikipedia.org/wiki/Media_type#Common_examples Cheers! Hussein Nasser --- Support this podcast: https://anchor.fm/hnasr/support