Chapter 6

Network Services

This chapter covers the following topics related to Objective 1.6 (Explain the use and purpose of network services) of the CompTIA Network+ N10-008 certification exam:

  • DHCP

    • Scope

    • Exclusion ranges

    • Reservation

    • Dynamic assignment

    • Static assignment

    • Lease time

    • Scope options

    • Available leases

    • DHCP relay

    • IP helper/UDP forwarding

  • DNS

    • Record types

      • Address (A)

      • Canonical name (CNAME)

      • Mail exchange (MX)

      • Authentication, authorization, accounting, auditing (AAAA)

      • Start of authority (SOA)

      • Pointer (PTR)

      • Text (TXT)

      • Service (SRV)

      • Name server (NS)

    • Global hierarchy

      • Root DNS servers

      • Internal vs. external

      • Zone transfers

      • Authoritative name servers

      • Time to live (TTL)

      • DNS caching

      • Reverse DNS/reverse lookup/forward lookup

      • Recursive lookup/iterative ...

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