How deeply does Build Python Web Apps with Streamlit cover cname record?

Defines the record and demonstrates DNS-provider fields, propagation delays, proxy settings, and certificate validation.

Cname record

As explained in Build Python Web Apps with Streamlit

A CNAME record is a DNS record that aliases one domain name to another domain name.

A CNAME record is a DNS entry that aliases one domain name to another address. It lets a browser reach a deployed app through a custom domain instead of its provider-generated address. section 12.4.1

Pointing a custom domain to an app

In a DNS provider such as Cloudflare, add a record with Type CNAME, Name www, and Target fact-frenzy.us-east-2.elasticbeanstalk.com. Disable proxying or forwarding initially. DNS changes may take several minutes to an hour to propagate. section 12.4.1

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

Follow the concrete alias from www.factfrenzyapp.com to its Elastic Beanstalk target. section 12.4.1

CNAME records can also validate domain ownership for a public certificate. Add the name and value supplied by AWS to DNS; after validation, the certificate changes from Pending Validation to Issued. section 12.4.2

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 SecurityA CNAME record is a DNS record that maps one domain name to another as an alias.

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Related concepts

DNS recordkind of · A DNS record is a structured Domain Name System entry associating a domain name with information such as an address, service target, or administrative value.
externalname service typeproduced by · ExternalName is a Kubernetes Service type that aliases a service name to an external DNS name without allocating a cluster IP address.
A recordcontrasts with · An A record is a DNS resource record that maps a domain name or hostname to an IPv4 address.
custom domainconfigures · A custom domain is a user-chosen domain name configured to provide an alternate address for a hosted service or resource.
domain validationused by · Domain validation is a certificate-issuance process in which a certificate authority verifies that the requester controls the domain named in the certificate request.

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.