How deeply does Build Python Web Apps with Streamlit cover domain name system?

Explains DNS through a phone-book analogy and a CNAME setup, stopping short of broader record types or resolution internals.

Domain name system

As explained in Build Python Web Apps with Streamlit

DNS is the naming system that maps human-readable domain names and subdomains to network resources.

DNS is the internet’s phone book: it helps a browser find the server associated with a human-readable domain name. A registrar’s DNS dashboard controls how that domain behaves. section 12.4.1

Use DNS to connect a purchased domain to a deployed application:

Register a domain through a provider such as Cloudflare or Route 53, then open its DNS management dashboard. section 12.4.1
Add a CNAME record with the host name www and the deployed application’s Elastic Beanstalk address as its target. section 12.4.1
Disable proxying or forwarding initially when the provider offers that option, avoiding an extra complication during setup. section 12.4.1

Pointing a custom domain to an app

For a deployed application at fact-frenzy.us-east-2.elasticbeanstalk.com, configure the www host to use a CNAME targeting that address. Visitors can then reach the application through www.factfrenzyapp.com. section 12.4.1

Elastic Beanstalk can also provide a public URL directly. The DNS prefix selected during environment creation becomes the application’s subdomain, making it useful for testing and demos before attaching a custom domain. section 12.3.6

www.factfrenzyapp.com -> fact-frenzy.us-east-2.elasticbeanstalk.com

Follow the concrete mapping from a custom www address to its Elastic Beanstalk endpoint. section 12.4.1

How Build Python Web Apps with Streamlit covers it

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Also explained in

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Acing the CCNA Exam: Volume 2 Advanced Networking and SecurityThe Domain Name System is a distributed naming system that translates domain names into network addresses and related resource records.
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Acing the Certified Kubernetes Administrator Exam, Second EditionThe Domain Name System, a hierarchical naming system that resolves domain or resource names to network addresses.
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ASP.NET Core in Action, 3eDNS is the hierarchical naming system that resolves hostnames to IP addresses and other network records.
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Rust in Action: Systems programming concepts and techniquesThe Domain Name System is a distributed naming system that maps domain names to network resource records such as IP addresses.
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Learn Docker in a Month of Lunches, Second EditionDNS is the Domain Name System, a distributed naming system that resolves domain names to network addresses.
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Grokking Web Application SecurityThe Domain Name System (DNS) is the hierarchical naming system that maps domain names to network addresses and other DNS records.

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Related concepts

UDPuses · UDP (User Datagram Protocol) is a connectionless transport-layer protocol that sends datagrams without guaranteeing delivery, ordering, or duplicate suppression.
TCPuses · TCP is a connection-oriented transport-layer protocol that provides reliable, ordered delivery of byte streams between network endpoints.
IP addressproduces · An IP address is a numerical address used by the Internet Protocol to identify a network interface and support packet delivery across networks.
nslookupused by · nslookup is a command-line utility that queries Domain Name System servers and displays domain names, addresses, and other resource records.
service discoveryused by · Service discovery is the process of identifying available services and obtaining the names, locations, or connection information needed to access them.
CoreDNSused by · CoreDNS is an extensible, plugin-based DNS server commonly used in Kubernetes clusters for service and workload name resolution.

This explainer was generated by Manning's knowledge graph from the text of Build Python Web Apps with Streamlit. The section links point to the parts of the book it draws on.