IP Services

Sooner or later every engineer copies something onto or off a router: a config backup before a risky change, a

DHCP hands a host its network identity; DNS makes names usable instead of addresses. The CCNA asks you to keep

When something breaks at 3 a.m., the first question is "what changed, and when?" Syslog is the

SNMP is how monitoring systems actually know your interface went down, your CPU spiked, or your optics are running hot.

Wrong time on a network device is not a cosmetic problem. Certificate validation fails, log timestamps become useless for incident

NAT is the reason your private 10.x network can talk to the internet, and it is also one of