Learn about the essentials of the Domain Name System (DNS), including name resolution, different record types, roots, zones, authority and recursion.
See the full webinar and the rest of the series at https://www.thousandeyes.com/resources/intro-to-dns-webinar
A complete Coverage of DNS and its features. This ppt deals with well balanced practical and theoretical aspects of DNS. The best ppt for a novice learner.
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.
A complete Coverage of DNS and its features. This ppt deals with well balanced practical and theoretical aspects of DNS. The best ppt for a novice learner.
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.
The Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for the purpose of locating and identifying computer services and devices with the underlying network protocols. By providing a worldwide, distributed directory service, the Domain Name System is an essential component of the functionality of the Internet.
DHCP Stands for Dynamic Host Configuration Protocol.
DHCP is a protocol that automatically provides an IP host with its IP address and other related configuration information ( subnet mask, default gateway,DNS etc. )
Works on Protocol UDP port no 67 and 68.
This slide contains details about domain name servers (DNS).
It also contains Resolution of the Name Servers with Domain Name Structure with statistics table. The process of Name resolution is also explained with Recursive and iterative resolution processes.
Optimizing Network Connectivity to your Data CenterThousandEyes
Talk presented at 451 Research Digital Infrastructure Summit and Uptime Symposium.
Network connectivity is as critical as power. Especially for highly available data centers. Yet many data center operators are at the mercy of their ISPs to deliver their packets. Connectivity is down? File a ticket. New monitoring technologies make it possible to continuously measure the performance and availability of data center network ingress and egress to optimize routes and avoid outages. This session covers:
How to get visibility into data center, WAN and Internet network segments.
Customer examples of availability and performance improvement using data center network monitoring.
Methods for alerting and reporting on data center network connectivity.
The Domain Name System (DNS) is a hierarchical decentralized naming system for computers, services, or any resource connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. Most prominently, it translates more readily memorized domain names to the numerical IP addresses needed for the purpose of locating and identifying computer services and devices with the underlying network protocols. By providing a worldwide, distributed directory service, the Domain Name System is an essential component of the functionality of the Internet.
DHCP Stands for Dynamic Host Configuration Protocol.
DHCP is a protocol that automatically provides an IP host with its IP address and other related configuration information ( subnet mask, default gateway,DNS etc. )
Works on Protocol UDP port no 67 and 68.
This slide contains details about domain name servers (DNS).
It also contains Resolution of the Name Servers with Domain Name Structure with statistics table. The process of Name resolution is also explained with Recursive and iterative resolution processes.
Optimizing Network Connectivity to your Data CenterThousandEyes
Talk presented at 451 Research Digital Infrastructure Summit and Uptime Symposium.
Network connectivity is as critical as power. Especially for highly available data centers. Yet many data center operators are at the mercy of their ISPs to deliver their packets. Connectivity is down? File a ticket. New monitoring technologies make it possible to continuously measure the performance and availability of data center network ingress and egress to optimize routes and avoid outages. This session covers:
How to get visibility into data center, WAN and Internet network segments.
Customer examples of availability and performance improvement using data center network monitoring.
Methods for alerting and reporting on data center network connectivity.
Using Data to Determine Where to Build a New Data Center at Shutterstock from...ThousandEyes
Gene Yaacobi, Infrastructure Manager at Shutterstock, presents how his team uses active probing of their applications from around the world to help with choosing new data center locations.
Endpoint Agent Part 3: LAN, Wireless, Gateways and ProxiesThousandEyes
Learn to use Endpoint Agent to identify both isolated and systemic issues in every part of your LAN, from wireless connections to gateways and proxies.
Harmonization of inter-cultural inter-religious and inter-ethnic relations: t...TANKO AHMED fwc
‘Humans are primarily concerned with preserving themselves in a dangerous world … made doubly dangerous by human factors’. Culture, ethnicity and religion constitute the '3D' foundation of loyalty, identity, and duty respectively, in the generality of human affairs. The dimension of human advancement seeks for harmony to harness resources for the betterment and general well-being of all. The cross-functional complexities of this triad therefore necessitate the emergence, and intervention of enabling civil societies to cater for ‘weaknesses’ of traditional governance. This paper attempts to define and establish the parameters for harmonization of inter-cultural, -ethnic and –religious relations by universal role of civil societies. It proffers ways and means of achieving these and concludes that humanity needs to harness both human and natural resources for progress and also to counter impending disasters of human and natural dimensions.
In part 4 of this BGP webinar series, we cover how to optimize Autonomous System paths, especially in cases of suboptimal international routes. Tips include monitoring layer 3 forwarding alongside BGP, monitoring reverse paths, layering covering prefixes, as well as prepending and MED.
Starting from key concepts, you'll learn how to recognize route leaks and hijacks in the data, alert for these events and proactively mitigate their impact. See the webinar recording at https://www.thousandeyes.com/webinars/detecting-hijacks-and-leaks
in this presentation their is the detailed information regarding Domain Name System that is DNS.
What is DNS,how it works,query, resolution wtc all are being covered thoroughly in this presentation as it would have in for all new upcoming Engineering students to know about the DNS as well as would also help employees to get the better understanding regarding the protocol.
The complete agenda of the presentation is to provide the detailed knowledge regarding dns as its the most basic protocol used in Web development.
Hope you would like it. If so please do like share and subscribe.
Computer Networks Module 1 - part 2.pdfShanthalaKV
18CS52 VTU Computer Network & Security
MODULE 1-Part 2
DNS; The Internet's Directory Service: Services Provided by DNS, Overview of How DNS Works, DNS Records and Messages, Peer-to-Peer Applications: P2P File Distribution, Distributed Hash Tables, Socket Programming: creating Network Applications: Socket Programming with UDP, Socket Programming with TCP.
A Domain Name System assigns an alphabetic name to a numeric IP address and is made up of multiple Domain Name servers that enable IP address mapping for devices on the Internet (usually servers).
The Domain Name System (DNS) provides a way to map or translate an unfriendly numerical IP address into a people-friendly format. Although this translation isn’t mandatory, it does make the network much more useful and easy to work with for humans.
Learn to choose and set up ThousandEyes DNS tests to systematically monitor the DNS records and servers for domains critical to your business.
See the full webinar and the rest of the series at https://www.thousandeyes.com/resources/monitoring-dns-records-servers-webinar
Domain Name System and Dynamic Host Configuration Protocol.pptxUsmanAhmed269749
Introduction to DNS and DHCP. The presentations highlights the introduction of Domain name System and Dynamic Host Configuration Protocol. These are essential study part in computer networking
Internet Technology Lectures
URL-DNS
Lecturer: Saman M. Almufti / Kurdistan Region, Nawroz University
facebook: https://www.facebook.com/saman.malmufti
YouTube link: https://youtu.be/pOx04uODo5o
23rd PITA AGM and Conference: DNS Security - A holistic view APNIC
Security Specialist Jamie Gillespie presents on DNS Security, examining the complex interactions of this system, from domain registration to name resolution, the security risks of each component, and the mitigation options currently available at 23rd PITA AGM and Annual Conference in Nadi, Fiji from 8 to 12 April 2019.
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.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
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.
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.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
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.
Connector Corner: Automate dynamic content and events by pushing a buttonDianaGray10
Here is something new! In our next Connector Corner webinar, we will demonstrate how you can use a single workflow to:
Create a campaign using Mailchimp with merge tags/fields
Send an interactive Slack channel message (using buttons)
Have the message received by managers and peers along with a test email for review
But there’s more:
In a second workflow supporting the same use case, you’ll see:
Your campaign sent to target colleagues for approval
If the “Approve” button is clicked, a Jira/Zendesk ticket is created for the marketing design team
But—if the “Reject” button is pushed, colleagues will be alerted via Slack message
Join us to learn more about this new, human-in-the-loop capability, brought to you by Integration Service connectors.
And...
Speakers:
Akshay Agnihotri, Product Manager
Charlie Greenberg, Host
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
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.
Empowering NextGen Mobility via Large Action Model Infrastructure (LAMI): pav...
Intro to DNS
1.
2. 1
• November 15th 2016
• An overview of the Domain Name System, resources,
records, name resolution and name servers.
DNS Webinar Series
• January 17th 2017
• An in-depth view on how to monitor and alert on DNS
availability, response time and record mappings.
Intro to DNS
Monitoring DNS
Records and Servers
• December 13th 2016
• Tips and examples covering DNS hijacking and DDoS
attacks on DNS infrastructure.
DNS Security
3. 2
About ThousandEyes
ThousandEyes delivers visibility into every network your organization relies on.
Founded by network
experts; strong
investor backing
Relied on for
critical operations by
leading enterprises
Recognized as
an innovative
new approach
31 Fortune 500
5 top 5 SaaS Companies
4 top 6 US Banks
4. 3
• The Domain Name System (DNS) is a helper system for IP.
• DNS is:
• A naming hierarchy for the Internet
• A directory service to translate (resolve) these names to IP addresses
• A protocol to perform name resolution
• You can think of DNS as a phone book for the Internet, helping you
look up IP addresses for a specific name.
The Domain Name System
5. 4
• Domain names provide flexibility and human readability to the Internet
Protocol.
• Domain names used in URLs and email addresses (e.g.
www.google.com) are easier for humans to remember than IP
addresses.
• In addition, network operators may want to switch IP addresses
without having to change the domain name.
• And network operators may want to have multiple IP addresses
assigned to a specific domain name to, for example, serve content
from multiple locations.
Why DNS Exists
6. 5
There are many DNS record types that store domain name data. Here
are 5 commonly used record types:
• A - IPv4 address
• AAAA - IPv6 address
• MX - Email server
• NS - Name server
• CNAME – Alias to another
domain name
A DNS record has a Time-to-Live (TTL) that specifies, in seconds, how
long it can be cached by a name server. Once it expires, the name server
must query for an updated record.
DNS Resources and Records
7. 6
• Clients use DNS to resolve a domain name to an IP address. Name
servers store DNS records and respond to domain name queries.
• Many clients use a recursive name server located in their network to
do work on their behalf. If this domain is unknown to the recursive
server, it can start at the root. Each name server will provide the most
specific answer it can. The recursive server will iterate through the
DNS hierarchy of zones to find an authoritative name server that
can answer the query.
Name Resolution
Client
(aka resolver)
Recursive server
(ISP, company, public DNS)
Root server
a.root-servers.net
TLD server
a.gtld-servers.net
Authoritative server
ns2.google.com
8. 7
• Recursive name servers make recursive queries on behalf of DNS
clients. They typically exist within ISPs, enterprise networks and public
DNS servers (e.g. Google public DNS 8.8.8.8).
• Many recursive servers only respond to queries from within their own
network. Some, called open resolvers, will respond to queries from
any source.
• Most recursive servers also cache DNS records, which are valid for the
length of the TTL.
Recursive Name Servers
Client
(aka resolver)
Recursive server
(ISP, company, public DNS)
Root server
a.root-servers.net
TLD server
a.gtld-servers.net
Authoritative server
ns2.google.com
Query: www.google.com
9. 8
• There are 13 root name servers that sit atop the DNS hierarchy and
are hard coded into any application that uses DNS. These root name
servers maintain a list of the top-level domain servers (.com, .uk,
.net, etc.).
• The answers provided by root and TLD name servers contain the name
servers for the next known subdomain.
Root and TLD Name Servers
Client
(aka resolver)
Recursive server
(ISP, company, public DNS)
Root server
a.root-servers.net
TLD server
a.gtld-servers.net
Authoritative server
ns2.google.com
Query: www.google.com
Answer: a.gtld-servers.net
Query: www.google.com
Answer: ns2.google.com
10. 9
• Authoritative name servers have authority to answer queries from
other name servers or from DNS clients. The DNS records in an
authoritative name server are maintained by domain administrator.
• A set of authoritative name servers are assigned for each zone. These
may be maintained by the organization itself, or by an external
company (UltraDNS, Akamai, Dyn, etc). Many organizations will split
name servers between multiple providers for redundancy.
Authoritative Name Servers
Recursive server
(ISP, company,
public DNS)
Root server
a.root-servers.net
TLD server
a.gtld-servers.net
Authoritative server
ns2.google.com
Query: www.google.com
Answer: 172.217.2.46
Answer: 172.217.2.46
12. 11
Monitor App & Network Connectivity Anywhere
Managed DNS
Provider
Internet
1 On-Premises DNS
Local caching resolvers
and self-hosted DNS
2 Hosted DNS
Authoritative, TLD and
Root Name Servers
Access
Networks
Cloud Agents
Enterprise
Agents
Branch
Data
Center
13. 12
• ns
• @
• +trace
• +dnssec
• +norec
ThousandEyes Approach to DNS Monitoring
• Authoritative and
caching server
network
• Routing metrics
DIG-like Features And Correlation
• Store, save,
share, baseline,
alert
With Analysis
Enterprise
Vendor
14. 13
See what you’re missing.
Watch the webinar:
https://www.thousandeyes.com/resources/intro-to-dns-webinar