A Zone record that maps a service to a host name is called a ____?

A Zone record that maps a service to a host name is called a ____?

• A. PTR Record
• B. MX Record
• C. SRV Record
• D. A Record

Answer: (C)

In DNS, an SRV record is used to locate a specific service on a host, including the port to reach that service. This type of record specifies the service, the protocol, the port, and the target host that provides the service. When a zone must map a particular service to the host that offers it, the SRV record is the exact fit. In Windows/Active Directory contexts, SRV records are what clients use to find services like LDAP, Kerberos, or the Global Catalog on domain controllers, by using entries like _ldap._tcp.dc._msdcs.example.com, which point to the appropriate host and port. By contrast, a PTR record maps an IP address back to a host name (reverse DNS), an MX record designates a mail server for the domain, and an A record maps a host name to an IPv4 address.

In DNS, an SRV record is used to locate a specific service on a host, including the port to reach that service. This type of record specifies the service, the protocol, the port, and the target host that provides the service. When a zone must map a particular service to the host that offers it, the SRV record is the exact fit.

In Windows/Active Directory contexts, SRV records are what clients use to find services like LDAP, Kerberos, or the Global Catalog on domain controllers, by using entries like _ldap._tcp.dc._msdcs.example.com, which point to the appropriate host and port.

By contrast, a PTR record maps an IP address back to a host name (reverse DNS), an MX record designates a mail server for the domain, and an A record maps a host name to an IPv4 address.