The document discusses content network navigation and DNS. It defines navigation, switching, routing and explains how DNS translates hostnames to IP addresses. It describes the components of DNS including the domain name space, name servers, resource records, and resolvers. It explains DNS requests, resolution process and tools like nslookup. It also summarizes load balancing techniques for switches including policies for best available server, persistence and differentiated services.
Build Dynamic DNS server from scratch in C (Part1)Yen-Kuan Wu
This is my final project. The purpose is that I don't get any course about Network, so I try to implement DNS server and learn from practicing.
In this slide, it would cover brief introduction of ddns server, prerequisite for building protocol, aims of my project and all of pitfalls I have met.
Demo resolver.
I would finish this project and provide the part2 of slide.
Domain Name System (DNS) - Domain Registration and Website Hosting BasicsAsif Shahzad
I teach Web Technologies course at COMSATS University to undergrad students. These are lectures slides prepared for students. I thought to share it with all. Hope you would like it. It contains good enough details about how DNS, Hosting and Domain Registration works.
Build Dynamic DNS server from scratch in C (Part1)Yen-Kuan Wu
This is my final project. The purpose is that I don't get any course about Network, so I try to implement DNS server and learn from practicing.
In this slide, it would cover brief introduction of ddns server, prerequisite for building protocol, aims of my project and all of pitfalls I have met.
Demo resolver.
I would finish this project and provide the part2 of slide.
Domain Name System (DNS) - Domain Registration and Website Hosting BasicsAsif Shahzad
I teach Web Technologies course at COMSATS University to undergrad students. These are lectures slides prepared for students. I thought to share it with all. Hope you would like it. It contains good enough details about how DNS, Hosting and Domain Registration works.
DNS, which stands for domain name system, controls your domain name's website and email settings. When visitors go to your domain name, its DNS settings control which company's server it reaches out to.
Many applications are network I/O bound, including common database-based applications and service-based architectures. But operating systems and applications are often untuned to deliver high performance. This session uncovers hidden issues that lead to low network performance, and shows you how to overcome them to obtain the best network performance possible.
DNS, which stands for domain name system, controls your domain name's website and email settings. When visitors go to your domain name, its DNS settings control which company's server it reaches out to.
Many applications are network I/O bound, including common database-based applications and service-based architectures. But operating systems and applications are often untuned to deliver high performance. This session uncovers hidden issues that lead to low network performance, and shows you how to overcome them to obtain the best network performance possible.
About DNS name service.
If you looking for Domain Name Registar, check out the review: https://medium.com/@JohnBeardslee/best-domain-name-registrars-top-recommendations-b3d65128b46a
We browse the Internet. We host our applications on a server or a cloud that is hooked up with a nice domain name. That’s all there is to know about DNS, right? This talk is a refresher about how DNS works. How we can use it and how it can affect availability of our applications. How we can use it as a means of configuring our application components. How this old geezer protocol is a resilient, distributed system that is used by every Internet user in the world. How we can use it for things that it wasn’t built for. Come join me on this journey through the innards of the web!
Overview of the Domain Name System (DNS).
In the early days of the Internet, hosts had a fixed IP address.
Reaching a host required to know its numeric IP address.
With the growing number of hosts this scheme became quickly awkward and difficult to use.
DNS was introduced to give hosts human readable names that would be translated into a numeric IP addresses on the fly when a requesting host tried to reach another host.
To facilitate a distributed administration of the domain names, a hierarchic scheme was introduced where responsibility to manage domain names is delegated to organizations which can further delegate management of sub-domains.
Due to its importance in the operation of the Internet, domain name servers are usually operated redundantly. The databases of both servers are periodically synchronized.
Carbon markets 101 introduces the market mechanisms under the Kyoto Protocol and related initiatives. It helps executives and managers understand emerging business issues around carbon trading, emission reduction projects and carbon monitoring.
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
Have you ever wanted a Ruby client API to communicate with your web service? Smithy is a protocol-agnostic language for defining services and SDKs. Smithy Ruby is an implementation of Smithy that generates a Ruby SDK using a Smithy model. In this talk, we will explore Smithy and Smithy Ruby to learn how to generate custom feature-rich SDKs that can communicate with any web service, such as a Rails JSON API.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
4. Try This! Go to the Command Line and type >ns lookup www.yahoo.com And typical response will be Server: Address: …… Name: Address: Your Server details Host details The Hosts file still exists!. It is used to allow users to specify an IP address to use for a hostname without checking DNS You can find it here: indowsystem32rivers tc Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
5.
6. DNS Components Source : Wikipedia Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
7.
8.
9.
10.
11. DNS Request Resolution Home Client Local ISP Root Name Server gTLD Name Server 1 2 3 4 5 6 7 8 Home Client resolver is configured to communicate with local name server at ISP. Home Client sends recursive request for IP address Local name server at ISP sends iterative request to root name server. Root name server responds with gTLD Name Server Local name server sends iterative request to gTLD name server The gTLD name server provides the authoritative name server for the requested domain The local name sever sends iterative request to authoritative name sever The server responds with authoritative answer The local DNS responds back to client and caches the reply 1 3 4 5 2 6 7 8 Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
12.
13. Switching Connecting to Endpoints The key issue in switching is to ask which web server to connect to? The objective is to balance the load between servers In this section we will discuss several ways to achieve load balancing Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
14.
15. Web Switches: Layer 4 switching Internet HTTP Server RTSP Server FTP Server Web Swith Name Server Client The Web switch is assigned an IP address – actual , registered and routable. Traffic does not stop at the Web Switch – connected thru to the real web Server Web switch can be configured to examine TCP Port numbers in making switching decisions (hence Layer 4 switching) The Web switch is called the VIP (Virtual IP address). Clients only see the VIP Port 80 traffic Port 554 traffic Port 20,21 traffic Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
16.
17.
18.
19.
20. Network Address Translation S IP=X D IP = SW Client X Switch SW Association SIP X SW DIP SW A SIP SW A DIP X SW S IP=SW D IP = A S IP=A D IP = SW Server A Annotation S = Source D = Destination Connecting individual clients to real servers behind a Web switch requires switch to perform NAT Switch does not terminate the protocol. It adjusts the header parameters Similar translation is required for port numbers The header checksums will also have to be adjusted Additional translations are needed to handle FTP and ICMP messages Number of associations can be large! Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
21.
22.
23. Layer 7 Switching: 3 steps Server Web Switch Client GET Step 1: Accept client connection and receive GET request GET Step 2: Choose server, make a connection and send GET request Client Step 3: Splice connections together (after translating TCP packet sequence and acknowledgement numbers) Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
24.
25. Steering Client Requests Once the destination has been selected (which is what we have learnt so far) several techniques can direct client requests to the destination Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
26.
27.
28. Understanding GSLB Internet Web Swith and Authoritative DNS Local DNS server Client The Client’s DNS resolver requests IP address from its local DNS server – belonging to ISP The request makes its way thru the DNS system till it reaches an authoritative server name for the domain The network is configured such that the only authoritative server names are GSLB-enabled switches The response is the service node that is likely to give the best performance since the GSLB switch is aware of the health of all service nodes Performance Information Exchange Web Swith and Authoritative DNS Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com
29.
30. Understanding HTML rewriting LA Server East Coast Client West Coast Client NY Server Main Server … http://ny.rewrite.net/.../logo.jpg http://ny.rewrite.net/.../text. html http://ny.rewrite.net/.../figure.jpg … http://la.rewrite.net/.../logo.jpg http://la.rewrite.net/.../text. html http://la.rewrite.net/.../figure.jpg Sanjoy Sanyal:www.itforintelligentfolks.blogspot.com