Which of the following records is the first entry in a DNS database file?

Question

Options

• ACNAME
• BSOA
• CSRV
• DMX

• A
  8% (3)
• B
  75% (30)
• C
  3% (1)
• D
  15% (6)

Explanation

Start of Authority (SOA) record is the first record in any DNS database file. The SOA resource record includes the following fields: owner, TTL, class, type, authoritative server, refresh, minimum TTL, etc. Answer: A is incorrect. Canonical Name (CNAME) is a resource record that creates an alias for the specified Fully Qualified Domain Name (FQDN). It hides the implementation details of a network from the clients that are connected to the network. Answer: D is incorrect. MX is a mail exchange resource record in the database file of a DNS server. It specifies a mail exchange server for a DNS domain name. Answer: C is incorrect. SRV resource record is a DNS record that enables users to specify the location of servers for a specific service, protocol, and DNS domain. For example, if there are two servers in a domain, creating SRV records specifies which hosts serve as Web servers, and resolvers can then retrieve all the SRV resource records for the Web

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