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TXT Records and SPF in DNS Configuration

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Questions and Answers

Which of the following is the primary purpose of TXT records in the DNS configuration?

To specify the IP addresses allowed to send email on behalf of a domain (correct)
To configure the domain's mail exchange (MX) records
To provide information about the domain owner's contact details
To identify the authoritative name servers for a domain

What is the main function of NS (Name Server) records in the DNS hierarchy?

To provide human-readable information about a domain, such as copyright notices
To configure DKIM (DomainKeys Identified Mail) authentication for email messages
To identify the authoritative DNS servers responsible for a domain's information (correct)
To verify domain ownership for services like Google Webmaster Tools

Which of the following is a common use of TXT records in addition to SPF configuration?

Configuring the domain's name server (NS) records
Defining the domain's mail exchange (MX) records
Specifying the IP addresses allowed to send email on behalf of the domain
Verifying domain ownership for services like Google Webmaster Tools (correct)

What happens when a recursive DNS resolver does not find the IP address for a domain in its local cache?

The resolver starts a recursive search of the DNS hierarchy, starting from the root servers (C) Signup and view all the answers

How can TXT records be used in the context of email authentication?

TXT records can be used to specify the IP addresses allowed to send email on behalf of the domain (SPF) (A) Signup and view all the answers

Which of the following is NOT a common use of TXT records in the DNS configuration?

Configuring the domain's mail exchange (MX) records (C) Signup and view all the answers

What is the purpose of the minimum time-to-live (TTL) value for resource records in a DNS zone?

It specifies the default time-to-live for all resource records in the zone. (C) Signup and view all the answers

What is the primary purpose of the DNS SRV (Service) record?

To specify the hostname and port number of a server that provides a particular service. (A) Signup and view all the answers

Which of the following is NOT a required field in a DNS SRV record?

Time-to-Live (TTL) (A) Signup and view all the answers

What is the purpose of the Priority field in a DNS SRV record?

It specifies the relative priority of the target host among multiple hosts with the same service and protocol. (B) Signup and view all the answers

What is the purpose of the Weight field in a DNS SRV record?

It specifies the relative weight of the target host among multiple hosts with the same priority. (C) Signup and view all the answers

What is the purpose of the Port field in a DNS SRV record?

It specifies the port number on which the service is provided. (D) Signup and view all the answers

What does an MX record in DNS do?

Directs mail to an email server (B) Signup and view all the answers

Which type of DNS record is used to store text notes for email security purposes?

TXT record (B) Signup and view all the answers

What does a PTR record provide in DNS?

Domain name in reverse-lookups (C) Signup and view all the answers

Which record type in DNS stores admin information about a domain?

SOA record (B) Signup and view all the answers

What is the purpose of an SPF TXT record in DNS?

Provides sender policy framework information (B) Signup and view all the answers

In DNS, what does an NS record store?

Name server for a DNS entry (A) Signup and view all the answers

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