Resource Records - The database records of domain name services, A records - IPv4 address of a host , AAAA records - IPv6 address of a host, MX - Determines the host name for the mail server, not an IP a name, TXT - Human readable text information , SPF - A list of all servers authorized to send emails for this domain, DKIM - Digitally sign a domain's outgoing mail, DMARC - Prevent unauthorized email use (spoofing), Scope Properties - IP address range,Subnet mask, lease durations, DHCP pools - Grouping of IP addresses, Dynamic assignment - DHCP server has a big pool of addresses to give out, address is reclaimed after a lease period, Automatic assignment - DHCP server keeps a list of past assignments, ALways get the same IP address, T1 Timer - Check in with the lending DHCP server to renew the IP address, 50% of the lease time (by default), T2 Timer - If the original DHCP server is down, try rebinding with any DHCP server, 87.5% of the lease time (7/8ths),

Comptia A+ 1101 2.6 DHCP Configuration

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