CompTIA A+ 1101 - 2.6 Compare and contrast common network configuration concepts

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11 Terms

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Address Records

  • defines the IP address of a host

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A

  • records for IPv4 address

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AAAA

  • records for IPv6 address

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Mail exchanger (MX)

  • determines the host name for the mail server (NOT an IP address, just a name)

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Text Records (TXT)

  • human-readable text information

  • useful public information

  • can be used for verification purposes

  • commonly used for email security

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Sender Policy Framework (SPF)

  • a list of all servers authorized to send emails for this domain

  • prevent mail spoofing

  • mail servers perform a check to see if incoming mail really did come from an authorized host

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Domain Keys Identified Mail (DKIM)

  • digitally sign a domain’s outgoing mail

  • validated by mail servers, not usually seen by end user

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Domain-based Message Authentication, Reporting and Conformance (DMARC)

  • prevent unauthorized email use (spoofing)

  • an extension of SPF and DKIM

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Lease

  • period of time a DHCP server allocates an IP address to a network client

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Reservation

  • ensures a specific device always receives the same IP address when connecting to a network

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Scope

  • defines a range of IP addresses that a DHCP server can dynamically assign to devices on a network