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Question

Difficulty: MediumIP Addressing Services

During a network infrastructure audit, a system administrator observes that client endpoints in a newly provisioned subnet are failing to resolve network services by name and cannot locate the primary Domain Controller for Kerberos authentication. To resolve service locator requests for specific network protocols (such as LDAP or Kerberos) including port numbers and target hostnames, which type of DNS resource record must be configured in the domain zone?

  1. SRV recordAnswer
  2. B
    CNAME record
  3. C
    PTR record
  4. D
    MX record

Answer

The SRV (Service) record is the correct DNS resource record type required to locate servers offering specific network services such as LDAP and Kerberos.
The SRV (Service) record defines hostnames and port numbers for specific services, enabling domain clients to discover directory and authentication services such as LDAP and Kerberos.

Step-by-Step Solution

1
Identify the specific DNS requirement in the scenario.
The requirement is to map a protocol service (LDAP/Kerberos) to a destination server hostname and port number.
Client endpoints rely on service location mechanisms to discover directory and authentication services.
2
Evaluate the functions of standard DNS resource record types.
SRV records define symbolic names, target hostnames, port numbers, priority, and weight for specific services.
Other record types (A, AAAA, CNAME, PTR, MX) lack port specification fields for general network services.

Key Concept

DNS Service Location (SRV) Records
Estimated Time:1m 0s
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Topics

IP Addressing Services

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