The document presents information about the Domain Name System (DNS) in a presentation for a dissertation. It defines DNS and describes DNS servers, tools, queries, records, and components. It explains that DNS converts domain names to IP addresses, allowing hosts to be located via names. DNS uses a distributed database and hierarchy of name servers to store host names and IP addresses mapped to domain names.
The document is a presentation on DNS (Domain Name System) given by Mauood Hamidi for his dissertation. It covers definitions of DNS, different types of DNS servers, tools used for DNS queries, DNS records, how DNS works to resolve domain names to IP addresses, and components of the DNS system like zones, name servers, and security considerations. It aims to provide an overview of the key concepts and functioning of DNS.
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.
Chapter 10 Domain Name Systems_MWSA.pptxmanju772238
The document discusses the Domain Name System (DNS) which translates domain names to IP addresses. It covers DNS hierarchy including root, top-level and second-level domains as well as subdomains and hosts. It also discusses DNS records like SRV records and DNS forwarding which improves performance by passing on namespaces not contained in local DNS servers to remote servers.
This document provides an overview of the Domain Name System (DNS). It describes DNS as a hierarchical distributed database that maps human-friendly domain names to computer-friendly IP addresses. DNS uses a client-server model where DNS clients submit queries to DNS servers to lookup names and the servers respond with the corresponding IP addresses. The document also discusses key DNS concepts like DNS records, zones, primary and secondary servers, and how DNS is used to support technologies like Active Directory and DHCP.
DNSSEC Tutorial, by Champika Wijayatunga [APNIC 38]APNIC
This document provides an overview of DNSSEC (Domain Name System Security Extensions). It discusses how DNSSEC introduces digital signatures to cryptographically protect DNS data and prevent man-in-the-middle attacks. It also describes some common DNS record types used in DNSSEC like DNSKEY, RRSIG, and DS. The document notes that while DNSSEC deployment has increased in top-level domains and root servers, adoption remains low at the second-level domain level, and more work is still needed for full deployment.
Chapter 4 configuring and managing the dns server roleLuis Garay
This document provides an overview of configuring and managing a DNS server. It discusses DNS namespaces, zones, resource records including SOA, NS, A, AAAA, CNAME, MX, and SRV records. It describes different types of DNS servers like primary, secondary, caching-only, and AD-integrated servers. It also covers topics like installing the DNS server role, configuring zones, performing zone transfers, and using root hints for name resolution.
This document summarizes the key components and functions of DNS (Domain Name System) servers. It discusses how DNS servers handle name resolution queries by querying other DNS servers in a hierarchical manner. It also describes different types of DNS zones (primary, secondary, stub) and how they are used. Active directory integrated zones provide benefits like secure dynamic updates and increased resilience through replication. The document concludes by demonstrating how to sign a DNS zone with DNSSEC to verify signatures.
The document is a presentation on DNS (Domain Name System) given by Mauood Hamidi for his dissertation. It covers definitions of DNS, different types of DNS servers, tools used for DNS queries, DNS records, how DNS works to resolve domain names to IP addresses, and components of the DNS system like zones, name servers, and security considerations. It aims to provide an overview of the key concepts and functioning of DNS.
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.
Chapter 10 Domain Name Systems_MWSA.pptxmanju772238
The document discusses the Domain Name System (DNS) which translates domain names to IP addresses. It covers DNS hierarchy including root, top-level and second-level domains as well as subdomains and hosts. It also discusses DNS records like SRV records and DNS forwarding which improves performance by passing on namespaces not contained in local DNS servers to remote servers.
This document provides an overview of the Domain Name System (DNS). It describes DNS as a hierarchical distributed database that maps human-friendly domain names to computer-friendly IP addresses. DNS uses a client-server model where DNS clients submit queries to DNS servers to lookup names and the servers respond with the corresponding IP addresses. The document also discusses key DNS concepts like DNS records, zones, primary and secondary servers, and how DNS is used to support technologies like Active Directory and DHCP.
DNSSEC Tutorial, by Champika Wijayatunga [APNIC 38]APNIC
This document provides an overview of DNSSEC (Domain Name System Security Extensions). It discusses how DNSSEC introduces digital signatures to cryptographically protect DNS data and prevent man-in-the-middle attacks. It also describes some common DNS record types used in DNSSEC like DNSKEY, RRSIG, and DS. The document notes that while DNSSEC deployment has increased in top-level domains and root servers, adoption remains low at the second-level domain level, and more work is still needed for full deployment.
Chapter 4 configuring and managing the dns server roleLuis Garay
This document provides an overview of configuring and managing a DNS server. It discusses DNS namespaces, zones, resource records including SOA, NS, A, AAAA, CNAME, MX, and SRV records. It describes different types of DNS servers like primary, secondary, caching-only, and AD-integrated servers. It also covers topics like installing the DNS server role, configuring zones, performing zone transfers, and using root hints for name resolution.
This document summarizes the key components and functions of DNS (Domain Name System) servers. It discusses how DNS servers handle name resolution queries by querying other DNS servers in a hierarchical manner. It also describes different types of DNS zones (primary, secondary, stub) and how they are used. Active directory integrated zones provide benefits like secure dynamic updates and increased resilience through replication. The document concludes by demonstrating how to sign a DNS zone with DNSSEC to verify signatures.
This document discusses the Domain Name System (DNS) and how it maps human-friendly domain names to IP addresses. It explains that DNS information is stored in a distributed database and domain names are registered through registrars like Network Solutions. Various DNS record types are described, like A records for IP addresses and MX records for mail servers. Finally, common DNS tools are listed, such as whois, nslookup, and host, for looking up domain information and IP addresses.
DNS is a globally distributed database that translates domain names to IP addresses. It consists of a name space organized in a hierarchical tree structure, servers that store data about parts of the name space, and resolvers that query servers to map names to addresses. The resolution process involves recursively querying servers at higher levels, like root and TLD servers, until reaching an authoritative name server that can provide the address. Caching improves performance by storing previous lookups.
A presentation on DNS concepts. It covers the topics DNS Introduction, DNS Hierarchy, DNS Resolution Process,
DNS Components, DNS Types, DNSSEC, DNS over TLS (DoT) & HTTPS (DoH), Oblivious DNS (ODoH).
The document is a slide presentation that provides an introduction to the Domain Name System (DNS). It discusses key concepts such as:
- DNS provides a mapping between domain names that are easy for humans to remember (e.g. www.example.com) and IP addresses that computers use to locate services.
- The DNS database is distributed across multiple name servers around the world to provide reliability and scalability. Changes propagate according to timing parameters.
- Name servers include authoritative servers that store official data for a zone, and recursive servers that handle lookups on behalf of clients and cache results.
- The domain name space is hierarchical with delegation of subdomains, and zones define administrative boundaries for domain data.
DNS Fundamentals Presentation_PANDI-2022.pdfroemahtoedjoeh
This document provides an overview of DNS fundamentals including what DNS is, its components and characteristics, how DNS queries work, and how DNS has evolved. Specifically:
- DNS is the phonebook of the internet that translates domain names to IP addresses in a globally distributed and hierarchical system that is critical internet infrastructure.
- It has components like root servers, domains and namespaces that organize addressing, nameservers that respond to queries, and resolvers on devices that initiate requests.
- DNS is distributed, loosely coherent, scalable and reliable by design. It uses ports 53 UDP and TCP to lookup records like A, AAAA, MX, NS, PTR and TXT.
- Evolutions
This document discusses domain name system (DNS) configuration and troubleshooting. It describes DNS components like name servers, domains, and zones. It provides instructions for configuring DNS in Linux and Windows, including setting up primary and secondary servers with zone files. Troubleshooting tools like ping, nslookup, and dig are also covered.
This document provides an overview of configuring and managing a DNS server, including:
1. Installing the DNS server role and configuring zones, records, and name resolution.
2. Describing DNS namespaces, zones, primary/secondary servers, and record types like SOA, NS, A, MX and SRV.
3. Explaining how DNS servers resolve queries using root hints, recursion, caching, and forwarders.
The document discusses the Domain Name System (DNS) and how it works. It covers DNS zones, forward and reverse lookups, forwarding, and delegation. DNS associates domain names with IP addresses and other information to direct internet traffic. It functions like a phone book to translate human-readable names to computer-readable IP addresses. DNS is hierarchical, with the domain name space divided into zones served by authoritative nameservers.
The document provides instructions on how to configure a DNS server. It begins by explaining what a DNS server is and its purpose of translating domain names to IP addresses. It then discusses IP addresses and the differences between dynamic and static IP addresses. Finally, it provides the steps to install and configure a Microsoft DNS server using DNS Manager. These include adding the DNS component in Windows and using DNS Manager to configure the server.
1) The document discusses DNS basics including its hierarchical database structure with root and top level domains (TLDs) at the top, and its main components like authoritative servers, recursive resolvers, and resource records.
2) It explains key DNS concepts like domains, zones, and delegation between zones. Common resource record types and a sample zone file are also described.
3) The document covers potential DNS issues like cache poisoning and vulnerabilities if data is not validated, which DNS Security Extensions (DNSSEC) aims to address through cryptographic signing of resource records.
1) DNS is a hierarchical distributed naming system that maps domain names to IP addresses through authoritative name servers responsible for particular domains and subdomains.
2) DNS servers resolve fully qualified domain names (FQDN) to IP addresses and vice versa.
3) A computer's DNS server IP address is configured in its TCP/IP settings, allowing it to send DNS requests to the correct server.
This document summarizes Dan York's presentation on deploying DNSSEC. It discusses how DNSSEC helps ensure the integrity of DNS data by using digital signatures to authenticate DNS responses, preventing cache poisoning and man-in-the-middle attacks. It provides examples of normal DNS interactions versus attacks, and how DNSSEC establishes a chain of trust. The presentation also covers the current state of DNSSEC deployment, how it works in combination with TLS/SSL through DANE, and business reasons for organizations to deploy DNSSEC.
The document summarizes the Domain Name System (DNS), which maps domain names to IP addresses. It describes how DNS evolved from a single host file to a hierarchical, decentralized system. DNS uses a tree-like structure with top-level domains like .edu or .com at the top. It assigns authoritative name servers to each domain to answer queries and cache previous responses to improve efficiency.
This document provides instructions on configuring DNS for Active Directory. It discusses configuring DNS zones, including primary, secondary, and stub zones. It also covers creating new zones, managing resource records, enabling dynamic updates, and configuring zone aging and scavenging. The key aspects covered are configuring zones, DNS server settings, and zone transfers and replication.
This document provides an overview of the Domain Name System (DNS) including:
- The DNS uses a globally distributed database to translate human-friendly domain names to computer-friendly IP addresses.
- It has a hierarchical structure with top-level domains like .com and country codes delegated to different name servers, and subdomains can be further delegated.
- DNS name servers store records about their portion of the name space and resolve queries by either responding with records from their cache or by recursively querying other name servers until the answer is found.
Active Directory is a hierarchical directory service for Windows domain networks that stores information about objects on the network such as user accounts, groups, computers, printers, and other network resources. It provides a centralized system for managing these resources. A domain controller is a server that contains the Active Directory database and controls access to network resources. A domain is a collection of computers, users, and groups that share a common directory database and security policies.
This document discusses DNS configuration. It provides an overview of DNS and its history. It describes DNS name space and how it works with an inverted tree structure. It discusses DNS name servers and zones, including forward and reverse lookup zones. It outlines the steps to configure DNS on a server, which includes installing bind9, editing configuration files for zones, and restarting the bind9 service. Tests are done using nslookup to resolve names and addresses.
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.
DNS (Domain Name System) is a hierarchical distributed database that maps hostnames to IP addresses. It allows easy-to-remember hostnames to be used instead of hard-to-remember IP addresses. The document discusses DNS servers, clients, resolvers, zones, and record types including SOA, NS, A, CNAME, PTR, MX, and SRV records. It also introduces tools for working with DNS like Nslookup, Ipconfig, and DNSCmd.
The document discusses the Domain Name System (DNS) which translates human-readable domain names to machine-readable IP addresses. It describes how DNS works by querying multiple nameservers in a hierarchical system to resolve domain names. It also discusses DNS servers, clients, cache, record types including A, AAAA, CNAME, NS and SOA records, and how DNS lookups are performed to translate domains to IP addresses for web browsing or other internet uses.
Predictably Improve Your B2B Tech Company's Performance by Leveraging DataKiwi Creative
Harness the power of AI-backed reports, benchmarking and data analysis to predict trends and detect anomalies in your marketing efforts.
Peter Caputa, CEO at Databox, reveals how you can discover the strategies and tools to increase your growth rate (and margins!).
From metrics to track to data habits to pick up, enhance your reporting for powerful insights to improve your B2B tech company's marketing.
- - -
This is the webinar recording from the June 2024 HubSpot User Group (HUG) for B2B Technology USA.
Watch the video recording at https://youtu.be/5vjwGfPN9lw
Sign up for future HUG events at https://events.hubspot.com/b2b-technology-usa/
Build applications with generative AI on Google CloudMárton Kodok
We will explore Vertex AI - Model Garden powered experiences, we are going to learn more about the integration of these generative AI APIs. We are going to see in action what the Gemini family of generative models are for developers to build and deploy AI-driven applications. Vertex AI includes a suite of foundation models, these are referred to as the PaLM and Gemini family of generative ai models, and they come in different versions. We are going to cover how to use via API to: - execute prompts in text and chat - cover multimodal use cases with image prompts. - finetune and distill to improve knowledge domains - run function calls with foundation models to optimize them for specific tasks. At the end of the session, developers will understand how to innovate with generative AI and develop apps using the generative ai industry trends.
This document discusses the Domain Name System (DNS) and how it maps human-friendly domain names to IP addresses. It explains that DNS information is stored in a distributed database and domain names are registered through registrars like Network Solutions. Various DNS record types are described, like A records for IP addresses and MX records for mail servers. Finally, common DNS tools are listed, such as whois, nslookup, and host, for looking up domain information and IP addresses.
DNS is a globally distributed database that translates domain names to IP addresses. It consists of a name space organized in a hierarchical tree structure, servers that store data about parts of the name space, and resolvers that query servers to map names to addresses. The resolution process involves recursively querying servers at higher levels, like root and TLD servers, until reaching an authoritative name server that can provide the address. Caching improves performance by storing previous lookups.
A presentation on DNS concepts. It covers the topics DNS Introduction, DNS Hierarchy, DNS Resolution Process,
DNS Components, DNS Types, DNSSEC, DNS over TLS (DoT) & HTTPS (DoH), Oblivious DNS (ODoH).
The document is a slide presentation that provides an introduction to the Domain Name System (DNS). It discusses key concepts such as:
- DNS provides a mapping between domain names that are easy for humans to remember (e.g. www.example.com) and IP addresses that computers use to locate services.
- The DNS database is distributed across multiple name servers around the world to provide reliability and scalability. Changes propagate according to timing parameters.
- Name servers include authoritative servers that store official data for a zone, and recursive servers that handle lookups on behalf of clients and cache results.
- The domain name space is hierarchical with delegation of subdomains, and zones define administrative boundaries for domain data.
DNS Fundamentals Presentation_PANDI-2022.pdfroemahtoedjoeh
This document provides an overview of DNS fundamentals including what DNS is, its components and characteristics, how DNS queries work, and how DNS has evolved. Specifically:
- DNS is the phonebook of the internet that translates domain names to IP addresses in a globally distributed and hierarchical system that is critical internet infrastructure.
- It has components like root servers, domains and namespaces that organize addressing, nameservers that respond to queries, and resolvers on devices that initiate requests.
- DNS is distributed, loosely coherent, scalable and reliable by design. It uses ports 53 UDP and TCP to lookup records like A, AAAA, MX, NS, PTR and TXT.
- Evolutions
This document discusses domain name system (DNS) configuration and troubleshooting. It describes DNS components like name servers, domains, and zones. It provides instructions for configuring DNS in Linux and Windows, including setting up primary and secondary servers with zone files. Troubleshooting tools like ping, nslookup, and dig are also covered.
This document provides an overview of configuring and managing a DNS server, including:
1. Installing the DNS server role and configuring zones, records, and name resolution.
2. Describing DNS namespaces, zones, primary/secondary servers, and record types like SOA, NS, A, MX and SRV.
3. Explaining how DNS servers resolve queries using root hints, recursion, caching, and forwarders.
The document discusses the Domain Name System (DNS) and how it works. It covers DNS zones, forward and reverse lookups, forwarding, and delegation. DNS associates domain names with IP addresses and other information to direct internet traffic. It functions like a phone book to translate human-readable names to computer-readable IP addresses. DNS is hierarchical, with the domain name space divided into zones served by authoritative nameservers.
The document provides instructions on how to configure a DNS server. It begins by explaining what a DNS server is and its purpose of translating domain names to IP addresses. It then discusses IP addresses and the differences between dynamic and static IP addresses. Finally, it provides the steps to install and configure a Microsoft DNS server using DNS Manager. These include adding the DNS component in Windows and using DNS Manager to configure the server.
1) The document discusses DNS basics including its hierarchical database structure with root and top level domains (TLDs) at the top, and its main components like authoritative servers, recursive resolvers, and resource records.
2) It explains key DNS concepts like domains, zones, and delegation between zones. Common resource record types and a sample zone file are also described.
3) The document covers potential DNS issues like cache poisoning and vulnerabilities if data is not validated, which DNS Security Extensions (DNSSEC) aims to address through cryptographic signing of resource records.
1) DNS is a hierarchical distributed naming system that maps domain names to IP addresses through authoritative name servers responsible for particular domains and subdomains.
2) DNS servers resolve fully qualified domain names (FQDN) to IP addresses and vice versa.
3) A computer's DNS server IP address is configured in its TCP/IP settings, allowing it to send DNS requests to the correct server.
This document summarizes Dan York's presentation on deploying DNSSEC. It discusses how DNSSEC helps ensure the integrity of DNS data by using digital signatures to authenticate DNS responses, preventing cache poisoning and man-in-the-middle attacks. It provides examples of normal DNS interactions versus attacks, and how DNSSEC establishes a chain of trust. The presentation also covers the current state of DNSSEC deployment, how it works in combination with TLS/SSL through DANE, and business reasons for organizations to deploy DNSSEC.
The document summarizes the Domain Name System (DNS), which maps domain names to IP addresses. It describes how DNS evolved from a single host file to a hierarchical, decentralized system. DNS uses a tree-like structure with top-level domains like .edu or .com at the top. It assigns authoritative name servers to each domain to answer queries and cache previous responses to improve efficiency.
This document provides instructions on configuring DNS for Active Directory. It discusses configuring DNS zones, including primary, secondary, and stub zones. It also covers creating new zones, managing resource records, enabling dynamic updates, and configuring zone aging and scavenging. The key aspects covered are configuring zones, DNS server settings, and zone transfers and replication.
This document provides an overview of the Domain Name System (DNS) including:
- The DNS uses a globally distributed database to translate human-friendly domain names to computer-friendly IP addresses.
- It has a hierarchical structure with top-level domains like .com and country codes delegated to different name servers, and subdomains can be further delegated.
- DNS name servers store records about their portion of the name space and resolve queries by either responding with records from their cache or by recursively querying other name servers until the answer is found.
Active Directory is a hierarchical directory service for Windows domain networks that stores information about objects on the network such as user accounts, groups, computers, printers, and other network resources. It provides a centralized system for managing these resources. A domain controller is a server that contains the Active Directory database and controls access to network resources. A domain is a collection of computers, users, and groups that share a common directory database and security policies.
This document discusses DNS configuration. It provides an overview of DNS and its history. It describes DNS name space and how it works with an inverted tree structure. It discusses DNS name servers and zones, including forward and reverse lookup zones. It outlines the steps to configure DNS on a server, which includes installing bind9, editing configuration files for zones, and restarting the bind9 service. Tests are done using nslookup to resolve names and addresses.
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.
DNS (Domain Name System) is a hierarchical distributed database that maps hostnames to IP addresses. It allows easy-to-remember hostnames to be used instead of hard-to-remember IP addresses. The document discusses DNS servers, clients, resolvers, zones, and record types including SOA, NS, A, CNAME, PTR, MX, and SRV records. It also introduces tools for working with DNS like Nslookup, Ipconfig, and DNSCmd.
The document discusses the Domain Name System (DNS) which translates human-readable domain names to machine-readable IP addresses. It describes how DNS works by querying multiple nameservers in a hierarchical system to resolve domain names. It also discusses DNS servers, clients, cache, record types including A, AAAA, CNAME, NS and SOA records, and how DNS lookups are performed to translate domains to IP addresses for web browsing or other internet uses.
Predictably Improve Your B2B Tech Company's Performance by Leveraging DataKiwi Creative
Harness the power of AI-backed reports, benchmarking and data analysis to predict trends and detect anomalies in your marketing efforts.
Peter Caputa, CEO at Databox, reveals how you can discover the strategies and tools to increase your growth rate (and margins!).
From metrics to track to data habits to pick up, enhance your reporting for powerful insights to improve your B2B tech company's marketing.
- - -
This is the webinar recording from the June 2024 HubSpot User Group (HUG) for B2B Technology USA.
Watch the video recording at https://youtu.be/5vjwGfPN9lw
Sign up for future HUG events at https://events.hubspot.com/b2b-technology-usa/
Build applications with generative AI on Google CloudMárton Kodok
We will explore Vertex AI - Model Garden powered experiences, we are going to learn more about the integration of these generative AI APIs. We are going to see in action what the Gemini family of generative models are for developers to build and deploy AI-driven applications. Vertex AI includes a suite of foundation models, these are referred to as the PaLM and Gemini family of generative ai models, and they come in different versions. We are going to cover how to use via API to: - execute prompts in text and chat - cover multimodal use cases with image prompts. - finetune and distill to improve knowledge domains - run function calls with foundation models to optimize them for specific tasks. At the end of the session, developers will understand how to innovate with generative AI and develop apps using the generative ai industry trends.
End-to-end pipeline agility - Berlin Buzzwords 2024Lars Albertsson
We describe how we achieve high change agility in data engineering by eliminating the fear of breaking downstream data pipelines through end-to-end pipeline testing, and by using schema metaprogramming to safely eliminate boilerplate involved in changes that affect whole pipelines.
A quick poll on agility in changing pipelines from end to end indicated a huge span in capabilities. For the question "How long time does it take for all downstream pipelines to be adapted to an upstream change," the median response was 6 months, but some respondents could do it in less than a day. When quantitative data engineering differences between the best and worst are measured, the span is often 100x-1000x, sometimes even more.
A long time ago, we suffered at Spotify from fear of changing pipelines due to not knowing what the impact might be downstream. We made plans for a technical solution to test pipelines end-to-end to mitigate that fear, but the effort failed for cultural reasons. We eventually solved this challenge, but in a different context. In this presentation we will describe how we test full pipelines effectively by manipulating workflow orchestration, which enables us to make changes in pipelines without fear of breaking downstream.
Making schema changes that affect many jobs also involves a lot of toil and boilerplate. Using schema-on-read mitigates some of it, but has drawbacks since it makes it more difficult to detect errors early. We will describe how we have rejected this tradeoff by applying schema metaprogramming, eliminating boilerplate but keeping the protection of static typing, thereby further improving agility to quickly modify data pipelines without fear.
Beyond the Basics of A/B Tests: Highly Innovative Experimentation Tactics You...Aggregage
This webinar will explore cutting-edge, less familiar but powerful experimentation methodologies which address well-known limitations of standard A/B Testing. Designed for data and product leaders, this session aims to inspire the embrace of innovative approaches and provide insights into the frontiers of experimentation!
ViewShift: Hassle-free Dynamic Policy Enforcement for Every Data LakeWalaa Eldin Moustafa
Dynamic policy enforcement is becoming an increasingly important topic in today’s world where data privacy and compliance is a top priority for companies, individuals, and regulators alike. In these slides, we discuss how LinkedIn implements a powerful dynamic policy enforcement engine, called ViewShift, and integrates it within its data lake. We show the query engine architecture and how catalog implementations can automatically route table resolutions to compliance-enforcing SQL views. Such views have a set of very interesting properties: (1) They are auto-generated from declarative data annotations. (2) They respect user-level consent and preferences (3) They are context-aware, encoding a different set of transformations for different use cases (4) They are portable; while the SQL logic is only implemented in one SQL dialect, it is accessible in all engines.
#SQL #Views #Privacy #Compliance #DataLake
STATATHON: Unleashing the Power of Statistics in a 48-Hour Knowledge Extravag...sameer shah
"Join us for STATATHON, a dynamic 2-day event dedicated to exploring statistical knowledge and its real-world applications. From theory to practice, participants engage in intensive learning sessions, workshops, and challenges, fostering a deeper understanding of statistical methodologies and their significance in various fields."
Codeless Generative AI Pipelines
(GenAI with Milvus)
https://ml.dssconf.pl/user.html#!/lecture/DSSML24-041a/rate
Discover the potential of real-time streaming in the context of GenAI as we delve into the intricacies of Apache NiFi and its capabilities. Learn how this tool can significantly simplify the data engineering workflow for GenAI applications, allowing you to focus on the creative aspects rather than the technical complexities. I will guide you through practical examples and use cases, showing the impact of automation on prompt building. From data ingestion to transformation and delivery, witness how Apache NiFi streamlines the entire pipeline, ensuring a smooth and hassle-free experience.
Timothy Spann
https://www.youtube.com/@FLaNK-Stack
https://medium.com/@tspann
https://www.datainmotion.dev/
milvus, unstructured data, vector database, zilliz, cloud, vectors, python, deep learning, generative ai, genai, nifi, kafka, flink, streaming, iot, edge
1. DNS : A STUDY
Presented By- MAUOOD HAMIDI
MSC CS
CUB1102312006
GUIDED BY:-
NEMI CHANDRA RATHORE SIR
HOD Dept. Of Computer Science
Central University Of Bihar
8/2/2013 Presented For Dissertation On DNS
2. COVERAGE
DNS DEFINITION
DNS SERVER
DNS TOOLS
DNS QUERY
DNS RECORDS
8/2/2013 Presented For Desertation On DNS
4. DOMAIN NAME SYSTEM
DNS Technology Allows Hosts On
TCP/IP Networks To Be Address By Its
Name. DNS Automatically Convert The
Names We Type In Our Web Browsers
Address Bar To The IPAddresses Of
Web Servers Hosting Those Sites.
Internet.w3school.com
Hostname Organization Top-level
domain
8/2/2013 Presented For Desertation On DNS
5. DNS CONTINUED
• DNS Include A Network Protocol for
Memorizing Host Name And Addresses
Through A Distributed Data Base.
• All The Top-Level domains, delegates
authority for second-level domains, and a
database of registered name servers for
all second-level domains Monitored by
The Network Information System(NIC).
8/2/2013 Presented For Desertation On DNS
6. DNS CONT………
• Host name assignments maintained
through zone files on primary DNS
server. Secondary DNS server gets zone
file from primary server.
8/2/2013 Presented For Desertation On DNS
7. DNS SERVER
• There are different types of DNS
SERVER available we can install any of
them as per our requirement. It Is Of
Three Types,
• Primary:- Locally stored files exists on
the name server data base.
• Secondary:- Gets data called a zone
transfer from another server that is the
zone authority.
8/2/2013 Presented For Desertation On DNS
8. DNS SERVERS
• Caching:- Only caches name server
information and does not contain its own
files.
• For example:-
• BIND, DJBDNS, ANS/CNS, POWER
DNS etc.
8/2/2013 Presented For Desertation On DNS
9. SERVER SUBSCRIPTION
• Costs range from $20 to $50 per year.
• ISP’s beginning to offer domain name
registration as part of other packages.
• Need to register a primary and secondary
domain name servers for your domain
and arrange to have zone files created on
DNS servers.
8/2/2013 Presented For Desertation On DNS
11. DNS TOOLS
• There are several tools for monitoring
DNS information:
– whois – tells you the owner and
primary DNS servers associated with a
domain (e.g. whois yahoo.com). Also
available via web browser at
www.networksolutions.com
8/2/2013 Presented For Desertation On DNS
12. DNS TOOLS
• -nslookup and host (on UNIX machines)
tell you IP address information for a
particular hostname on the internet (e.g.
-nslookup www.gmail.com or host
www.nic.edu)
8/2/2013 Presented For Desertation On DNS
13. DNS TASKS
• What are IP addresses of the DNS
servers that contain information about
rutgers.edu?
• What are the IP address of:
– www.ahuja.com
– sandy.admin.tcs.com
– www.linux.org
8/2/2013 Presented For Desertation On DNS
14. DNS Queries
• A DNS query packet is formed at the
application layer.
• DNS is unique, as it can utilize either
UDP/IP or TCP/IP to send a message.
– Uses UDP by defult – if message is too
bit (>512 bytes), it will use TCP
8/2/2013 Presented For Desertation On DNS
15. Types of DNS Records
There are several types of DNS records
that are kept by DNS servers:
– “A” Records: give the IP address for a
hostname.
– CNAME Records: give aliases for
hostanmes (i.e. web.cub.ac.in =
www.cub.ac.in)
8/2/2013 Presented For Desertation On DNS
16. DNS RECORDS
-MX Records: give the IP address of the
‘mail host’ for a hostname or domain
(I.e. “Mail addressed to anyone
@cub.ac.in gets handled by the ‘mail
server’ mail.cub.ac.in)
Some more are,
- SOA, NS, PTR, HINFO, TXT
8/2/2013 Presented For Desertation On DNS
17. Network Tools
• Ping (Windows and UNIX)
• Traceroute (tracert on Windows,
traceroute on UNIX)
• Nslookup (UNIX only)
• Host (UNIX only)
8/2/2013 Presented For Desertation On DNS
18. Why We Need DNS
• As the system grew, HOSTS.TXT had
problems with:
– Scalability (traffic and load)
– Reliability
– Dynamicity
– Name collisions
– Consistency
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19. DNS NAME SPACE
• The name space is the structure of the
DNS database
– An inverted tree with the root node at the
top
• Each node has a label
– The root node has a null label, written as “”
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20. DNS ROOTS
th ird -le v e l n o d e
s e c o n d -le v e l n o d e s e c o n d -le v e l n o d e
to p -le v e l n o d e
th ird -le v e l n o d e th ird -le v e l n o d e
s e c o n d -le v e l n o d e
to p -le v e l n o d e
s e c o n d -le v e l n o d e s e c o n d -le v e l n o d e
to p -le v e l n o d e
T h e ro o t n o d e
""
8/2/2013 Presented For Desertation On DNS
21. Domain Names
A domain name is the sequence of labels
from a node to the root, separated by
dots (“.”s), read left to right
– The name space has a maximum depth
of 127 levels
– Domain names are limited to 255
characters in length
A node’s domain name identifies its
position in the name space
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23. GENERIC DOMAIN
d a k o ta
w e s t
to rn a d o
e a s t w w w
n o m in u m m e ta in fo
c o m
b e rk e le y n w u
e d u g o v
n a to
in t
a rm y
m il
u u
n e t o rg
""
8/2/2013 Presented For Desertation On DNS
24. COUNTRY DOMAIN
Each Country Is Assigned A Single
Top Level Domain, Like
.in(ac.in, nic.in, gov.in)
.us(ac.us, af.gov.us)
8/2/2013 Presented For Desertation On DNS
25. Subdomains
One domain is a subdomain of another
if its top node is a descendant of the
other’s top node
More simply, one domain is a
subdomain of another if its domain
name ends in the other’s domain name
So
purchase.tradus.com is a subdomain of
tradus.com
8/2/2013 Presented For Desertation On DNS
26. Delegation
Administrators can create subdomains to
group hosts
– According to geography, organizational
affiliation etc.
An administrator of a domain can
delegate responsibility for managing a
subdomain to someone else
The parent domain retains links to the
delegated subdomain
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27. Zones By Delegation
Each time an administrator delegates a
subdomain, a new unit of administration is
created
– The subdomain and its parent domain can now be
administered independently
– These units are called zones
– The boundary between zones is a point of delegation
in the name space
Delegation is good: it is the key to scalability
8/2/2013 Presented For Desertation On DNS
28. Name Servers
Name servers store information about the name
space in units called “zones”
– The name servers that load a complete zone are said
to “have authority for” or “be authoritative for” the
zone
Usually, more than one name server are
authoritative for the same zone
– This ensures redundancy and spreads the load
Also, a single name server may be authoritative
for many zones
8/2/2013 Presented For Desertation On DNS
29. Name Servers and Zones
10.0.0.6
cub.ac.in
20.1.1.1
10.0.0.5
Name Servers
cu.com
Zones
10.0.0.6 serves
data for both
centraluniversity
ofbihar.ac.in and
cub.org zones
10.0.0.5
serves data for
cub.ac.in zone
only
20.1.1.1 serves
data for cu.com
zone only
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30. Types of Name Servers
Two main types of servers
– Authoritative – maintains the data
• Master – where the data is edited
• Slave – where data is replicated
– Caching – stores data obtained from an
authoritative server
Other types exist…
No special hardware necessary
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31. Loads On DNS
DNS can handle the load
– DNS root servers get approximately 3000
queries per second
oEmpirical proofs (DDoS attacks) show root name
servers can handle 50,000 queries per second
o Limitation is network bandwidth, not the DNS
protocol
– in-addr.arpa zone, which translates numbers
to names, gets about 2000 queries per second
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32. DNS Efficiency
DNS is a very lightweight protocol
– Simple query – response
Any performance limitations are due to
the network limitations
– Speed of light
– Network congestion
– Switching/forwarding latencies
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33. DNS Security
Base DNS protocol (RFC 1034, 1035) is
insecure
– “Spoof” attacks are possible
DNS Security Enhancements (DNSSEC, RFC
2565) remedies this flaw
– But creates new ones
• DoS attacks
• Amplification attacks
DNSSEC strongly discourages large flat zones
– Hierarchy (delegation) is good
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34. REFERENCES
• Computer Networks-Andrew S
Tanenbaum
• Fundamental Of Computer Networks
• CDEEP BOMBAY(TUTORIALS)
• Wikipedia.com
• W3school.com
8/2/2013 Presented For Desertation On DNS