This document provides an overview of computer networking concepts including:
- A brief history of networking from 60,000 years ago to the invention of the World Wide Web in 1989.
- Key facts about internet growth from 38 million broadband users in 1999 to over 2.7 billion people online today.
- An explanation of how networking standards like TCP/IP and the OSI model were developed to enable communication between different computer systems.
- A high-level overview of the seven layers of the OSI model and examples of technologies that operate at each layer.
- Descriptions of common networking concepts like DNS, NAT, VLANs, and wireless networking.
This is Data Communication Lecture Assignment. Here discussed about many topics above the subject. I am really learned more from Data Communication subject. Specially thanks to Dear Respectable Sir Pranab Bandhu Nath
This is Data Communication Lecture Assignment. Here discussed about many topics above the subject. I am really learned more from Data Communication subject. Specially thanks to Dear Respectable Sir Pranab Bandhu Nath
Introduction to Computer Networking - School level Matthew Bulat
What is computer networking? Why is networking important for yourself and business? How is networking achieved in a school environment? How can satellite networking help in remote location? How can I learn more on networking for free?
A computer network is a group of computers linked to each other that enables the computer to communicate with another computer and share its resources, data, and applications.
A computer network can be categorized by its size. A computer network is mainly of four types:
Computer Network Types
LAN(Local Area Network)
PAN(Personal Area Network)
MAN(Metropolitan Area Network)
WAN(Wide Area Network)
Here is the short description about computer network components.
Explained here about networking components such as Hub, Switch, Repeater, Bridge and so on.
Introduction to Computer Networking - School level Matthew Bulat
What is computer networking? Why is networking important for yourself and business? How is networking achieved in a school environment? How can satellite networking help in remote location? How can I learn more on networking for free?
A computer network is a group of computers linked to each other that enables the computer to communicate with another computer and share its resources, data, and applications.
A computer network can be categorized by its size. A computer network is mainly of four types:
Computer Network Types
LAN(Local Area Network)
PAN(Personal Area Network)
MAN(Metropolitan Area Network)
WAN(Wide Area Network)
Here is the short description about computer network components.
Explained here about networking components such as Hub, Switch, Repeater, Bridge and so on.
I use this deck to introduce the terms and technologies used in the set of e-readers we loan out to libraries. I also discuss the process of checking out ebooks from a public library through Overdrive.
Slide ini adalah copyright dari buku Computer Networking : A Top-Down Approach (5th Edition) by James F. Kurose and Keith W. Rose.
Tutorial versi video berbahasa indonesia dapat diakses di http://www.pecollege.net/ViewVideoList.aspx?list=9
Ini gratis
My IT Management course in UBC MBA
Prof: Ron Cenfetelli
Web 2.0 – Moving beyond HTML
Confidentiality
Authentication
Ability to verify the identity of people/organizations
Data/Message Integrity
Ensuring communications were not modified in transit/storage
Nonrepudiation
Parties cannot deny a communication
Proof that the sender sent and proof that the receiver received
The Internet is a global wide area network that connects computer systems across the world. It includes several high-bandwidth data lines that comprise the Internet "backbone." These lines are connected to major Internet hubs that distribute data to other locations, such as web servers and ISPs.Sep 17, 2015
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
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/
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
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.
GenAISummit 2024 May 28 Sri Ambati Keynote: AGI Belongs to The Community in O...
Networking 101 english
1. Networking 101
by : Eliran Ben-Zikri
Welcome to the amazing world of computer
networking, I hope you’ll find this presentation
informative and interesting.
Networking – A bunch of devices with cool
green LEDs that when combined all together
allows computers to exchange data
2. Networking 101
History
60,000 Years ago – People started to Speak
5,000 Years ago – People started to Write
600 Years ago – Please started to publish
50 Years ago – The Internet was born
3. Networking 101
History
WWW was invented in 1989 by Tim Berners-
Lee. The entire World-Wide-Web used to be just
one computer
6. Internet? Say what?
How did it all start?
Back in the 70’s, many vendors developed
many types of computers, each has it’s own
set of protocols and architecture
an IBM Computer could only talk to an IBM
computer
No standards, No compatibility
TCP/IP & OSI model we’re combined to help
creating the world you know today
7. OSI Model
The Layers of the Internet
The Open System Interconnect Model
Wait, What?
8. OSI Model
Key Principles
Divides Networking to 7 Layers
Each layer takes care of a very specific job
Each Job is not too Complicated
Passes the data onto the next layer.
Defines “What”, Not “How”
9. OSI Model
1 Model To Rule Them All
Application
Presentation
Session
Transport
Network
Data Link
Physical
האפליקציה שכבת
התצוגה שכבת
השיחה שכבת
התובלה שכבת
הרשת שכבת
הערוץ שכבת
פיזית שכבה
10. The physical layer does not understand anything but bits:
The signal comes to it in the form of pulses and is
transformed into 0's and 1's.
Examples:
Physical Equipment, Cables, Connectors, NICs
Bit Sync, Work Rate
Hubs, Repeaters, USB, Bluetooth, SDH, DSL
Encoding
Parallel VS. Serial
OSI Model
#1 - Physical Layer
RCVTRS
…110100101110010011101…
11. Puts some sense to the bits, turning them into Frames,
Bridging between Layer 1 & 3 (LLC & MAC), Connecting
between Hosts in the LAN – No IP’s, Just MAC’s.
Examples:
CRC – Error Handling
ARP Table
Collisions and Broadcasts
MAC Addresses
Switches, LAN, ATM, VLANs
OSI Model
#2 – Data-Link Layer
1
2
3 6
5
4
12. Responsible for packet forwarding, Routing, Transferring
data from a source to a destination host via one or more
networks, while maintaining Quality-Of-Service functions
Connecting two or more LANs all together
Examples:
Inter-Networking (Internet = Collection of LANs 7 WANs)
IP Protocol (Connectionless), ICMP, IPSec, IPX
QOS, Routing
Packets, WAN
OSI Model
#3 – Network Layer
13. Provides end-to-end communication services for
applicationswithin a layered architecture of network
components and protocols, Between Ports.
Examples:
Connects between Applications
Reliabile/Unreliable Connection (VoIP vs HTTP)
Flow Control
Multiplexing
TCP, UDP, Segments
OSI Model
#4 – Transport Layer
14. Provides the mechanism for opening, closing and
managing a session between end-user application
processes
Examples:
Full/Half Duplex
Sync
RPC, SCP
OSI Model
#5 – Session Layer
15. Responsible for the delivery and formatting of information
to the application layer for further processing or display.
Examples:
Data Conversion
Encryption & Decryption
ASCII, Terminal, Telnet, AFP
OSI Model
#6 – Presentation Layer
Value Code
A 65
B 66
C 67
D 68
E 69
F 70
16. The user interface, Responsible for displaying data and
images to the user in a human-recognizable format and to
interface with the presentation layer below it.
Examples:
SSH, FTP, HTTP, SSL, DNS
NFS, SIP, SMB, SMTP, RDP
LDAP, POP, IMAP, SNMP
REST, Web Applications
OSI Model
#7 – Application Layer
18. OSI Model
#7 – Application Layer
Application
Presentation
Session
Transport
Network
Data Link
Physical
Application
Presentation
Session
Transport
Network
Data Link
PhysicalPhysical
Data Link
Network
19. Networking 101
DNS
DNS – Domain Name Server/Service
It translates easily memorized domain names
to the numerical IP addresses
Hierarchical!
www.eToro.com -> 91.220.30.150
Openbook.eToro.com -> 91.220.30.151
Client
Local
Name
Server
Root
Name
Server
IP
IP
Name
Name
21. Networking 101
NAT
NAT – Network Address Translation
Private IP’s <-> Public IP’s
One-to-One, One-to-Many
Source NAT: In -> Out
Destination NAT: Out -> In
22. Networking 101
VLAN
VLAN – Virtual LAN
Partitioning a Switch to several virtual networks
A router is needed for Inter-LAN communication
Software rather than Hardware
Each Packet is tagged with
A VLAN number, and Only
Trunk ports or the same
VLAN ports can accept these
Frames (Layer 2)
23. Networking 101
Wireless
Wi-Fi/WLAN based on IEEE 802.11 specs
Uses wireless access points (WAPs)
Usually operate in the unlicensed spectrum near 2.4 GHz.
MIMO – Multiple Input, Multiple Output
802.11a 54Mbps max, 75 feet max, uses 5 GHz band - Rare
802.11b 11Mbps max, 45 meter max, 2.4 GHz, lowest cost – The Past
802.11g 54Mbps max, 45 meter max, 2.4 GHz band – The Popular
802.11n 600Mbps max, 70 meter max, 2.4 or 5 GHz band, MIMO – Rising
802.11ac 1Gbps max, 70 meter max, 5 GHz band, MIMO – The Future