How DNS resolves a name
What DNS is, what actually happens when you type a domain name, recursive vs authoritative servers, how TTLs and caching work, and the record types worth knowing.
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Network services
DNS, DHCP, HTTP & TLS
DHCP & leases
DHCP & leases: the DORA handshake. Part of the free Link to NetEra networking curriculum.
HTTP & TLS
HTTP & TLS: handshake first, secrets after. Part of the free Link to NetEra networking curriculum.
NTP & syslog
NTP & syslog: synchronized clocks make logs line up. Part of the free Link to NetEra networking curriculum.