https://letsencrypt.org/docs/a-warm-welcome-to-asn1-and-der/
ASN1 is a language agnostic SCHEMA and data exchange format. DER is the Base64 encoding (e.g. binary => ascii) for exchange and storage.
OIDs are uniq identifiers within ITU/ISO standardized tree used commonly by the CA cab, LDAP, SNMP, document libaries in government orgs. and more.
MIBs:
https://en.wikipedia.org/wiki/Management_information_base
indexes/directories
https://1.ieee802.org/mib-modules/
https://www.icir.org/fenner/mibs/mib-index.html
https://www.oidview.com/mibs/detail.html
registry upload:
https://www.oidview.com/mib-upload.html
OIDS and PENs:
Search:
https://www.iana.org/assignments/enterprise-numbers/?q=Da+Planet+Security
Registry: https://oid-info.com
http://oid-info.com/cgi-bin/display?oid=1.3.6.1.4.1.42387&a=display
Base: http://oid-info.com/cgi-bin/display?oid=1.3.6.1.4.1.54392
https://freeoid.pythonanywhere.com/getoid