Tor or (The Onion Router) is a free and open source project for allowing anonymous communication. In this video I want to discuss this technology and explain how it works. What can sniffers really see? Why Tor? Why don’t we just use a VPN? How Tor Works? More about Tor So if you are interested stay tuned. Cards: 6:00 TLS 10:53 symmetric key encryption TimeCodes: Normal Request 1:30 What sniffers see 4:30 Why Tor and not VPN? 6:00 How Tor Works 8:50 More tor info 21:00 Tor Directory Relay node Ex...
Nov 30, 2019•24 min
Apache Kafka is a distributed stream processing software developed by LinkedIn and written in Scala and Java. In this video I want to focus on the basics on Kafka, talk about how it works give finally spin up a kafka cluster and write a producer and a consumer. Kafka Components _ producer _consumer _topic _partition How Kafka works Example ( Ride sharing ) Spin Kafka cluster Write a producer Write a consumer Kafka Applications Pros and Cons...
Nov 30, 2019•1 hr 18 min
Tom Scott Full Video https://youtu.be/WVDQEoe6ZWY Tom Scott is a YouTuber with around 2M subscribers who discusses and specialized in computer security. I always enjoy his videos specially those on computerphile. He recently made a very interesting video titled This video is sponsor by —- We all probably know this is a reaction video to NordVPN Hack. He is really smart and not just because of his accent I wanted to make a video to elaborate on some of the statements that Tom made in his video an...
Nov 03, 2019•16 min
RabbitMQ RabbitMQ is an open source distributed message queue written in Erlang and supports many communication protocols. It was trying to solve the spaghetti 🍝 mesh architecture where every client is communicating with other client in System by introducing an extra layer in the middle. (slide) In this video we will explain basic components of RabbitMQ Such as AMQP, channel, queue, publisher, consumer and some stuff, we will also learn how to spin up a RabbitMQ server and we will finally write...
Nov 03, 2019•43 min
Redis is a noSQL key-value store, in memory database first that exploded in popularity in the past few years. In this video slash course, we will explain what Redis is, talk about the in-memory model, the optional durability, replication, clustering publish subscribe and the protocol and finally we will go through examples. During the video I will add time codes to each topic so you guys can jump to the topic that interests you the most. Table of Content and TimeCodes Redis as a NoSQL In Memory ...
Oct 04, 2019•38 min
GraphQL Pros and Cons, examples and when to use over REST GraphQL is an open source query language developed by facebook that allows clients to formulate queries to get different results. Its main goal is to combine multiple services into one endpoint. In this video we will discuss what is GraphQL, why facebook developed it, go through some examples using github GraphQL API, finally we will discuss the pros and cons and when you should use this technology. What is GraphQL? Examples Pros and Cons...
Sep 26, 2019•58 min
Consistency vs Eventual Consistency Consistency is the property of having expected result in view of the data or during reads while working with a database system. It is one of the ACID properties in relational databases. Eventual consistency is another term that was born recently specifcally as NOSQL databases got emerged. In this video we will talk discuss the difference the different kind of consistencies and we will explain what Eventual consistency and how both relational databases and NO S...
Aug 27, 2019•15 min
ACID ACID are four properties of relational database, they Atomocity, consistency, isolation and durability, and I think any one working with a relational database like postgres, mysql, sqlserver oracle, should understand these properties. In this video we will go through the four properties and explain why each is critical to make a relational database we will also talk about why some people are moving to NOSQL database Atomicity All or none. if a failure happened during transaction, db failure...
Aug 21, 2019•45 min
REST stands for Representational state transfer its is an architecture that became very popular in build web APIs. It was the dissertation of Roy Fielding. In this video we discuss what makes an API RESTFUL, the REST APIs constrains, ill the show you an example of a RESTFUL api in github. Representation and State transfer Representational The resource is a representation or meta data, but the actual backend could be something else and stored differently. An Example, could be a user resource coul...
Aug 07, 2019•26 min
A proxy is a software that intercepts traffic and forward it to the destination on behave of the client. This extra layer provide several advantages such as caching, load balancing, content filtering and much more. Some implementations of proxy can be used by governments to spy on its citizens. We made a video about proxy vs reverse proxy check it out if you want to learn more about the difference. In this video we will explain the different types of HTTP proxies and the benefits and use cases o...
Aug 01, 2019•16 min
HTTP is a protocol for transferring web pages, text, media, binary files and much more. It stands for hyper text transfer protocol and It is what the Internet pretty much runs on. In this video we will learn how HTTP works, how it is secured with HTTPS, will also show how to spin up an Http web server, and we will also go through the evolution of HTTP starting from HTTP 1.0 to HTTP 1.1 to HTTP/2 and eventually HTTP/3 which is still experimental. HTTP anatomy Request (browser, web app) URL Method...
Jul 15, 2019•48 min
NAT network address translation is a process of mapping an IP address or IP port pair to another IP address or IP: port. You might be wondering what a software engineer like me doing making a video on a low level networking concept? I have good reasons for that. NAT was originally designed to solve the ipv4 limited IP addresses, but since been used for port forwarding and layer 4 load balancing through the virtual ip address such as Haproxy thats why I decided to make a video about NAT from a so...
Jul 04, 2019•22 min
Tunneling protocol Tcp tunneling Tunneling is the process of encapsulating content from a protocol A into another protocol B, usually because protocol A is blocked or unavailable. In this video we will explain how TCP tunneling works, the applications of TCP tunnels and the pros and cons. Coming up! * TCP Tunneling * Applications * Pros and Cons TCP Tunneling Here is how TCP Tunneling works. Lets say your goal is to access a website that your ISP proxy blocks www.server2.com this is hosted on se...
Jun 29, 2019•31 min
TLS which stands for transport layer security is a protocol for securing communication between client and server. Specifically for HTTPS. Thats what the S is stands for. In this video, we will learnq how insecure vanilla HTTP works, HTTPS, then we will learn how HTTPS is possible via the transport layer security and finally we will talk about the improvements in 1.3 that was published August 2018. Vanilla HTTP HTTPS TLS 1.2 handshake TLS 1.3 enhancements Vanilla HTTP Before we discuss TLS, HTTPS...
Jun 23, 2019•25 min
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 ...
Jun 16, 2019•23 min
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 th...
Jun 16, 2019•25 min
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 o...
Jun 16, 2019•23 min
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 🏷 tcp pros cons(4:12) Tcp demo (19:00) Udp pros cons (24:25) Udp demo (31:25) Summary (35:4...
Jun 02, 2019•40 min
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.
May 26, 2019•22 min
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 GE...
Mar 16, 2019•17 min
Attribute Rules are scripts that can be authored and placed in the geodatabase to ensure data integrity lets discuss them.
Mar 16, 2019•9 min
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.
Mar 10, 2019•15 min
Join me in the upcoming Esri dev summit! Ill be presenting attribute rules and the utility network.
Feb 26, 2019•3 min
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,
Feb 16, 2019•21 min
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 notificat...
Feb 14, 2019•16 min
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
Feb 12, 2019•12 min
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 menti...
Feb 09, 2019•10 min
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
Feb 05, 2019•11 min
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.
Feb 02, 2019•42 min
A podcast about the difference between a layer and its data source. Enjoy!
Jan 31, 2019•10 min
