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RHEL Tutorial 17 (Secondary DNS Server) : Linux Tutorials : Linux Secondary DNS Configuration Video Lecture | RHEL (Red Hat Enterprise Linux): Basic Tutorials - Back-End Programming

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FAQs on RHEL Tutorial 17 (Secondary DNS Server) : Linux Tutorials : Linux Secondary DNS Configuration Video Lecture - RHEL (Red Hat Enterprise Linux): Basic Tutorials - Back-End Programming

1. What is a secondary DNS server?
Ans. A secondary DNS server is a server that stores a copy of the zone files from the primary DNS server. It helps in distributing the DNS workload and provides redundancy in case the primary DNS server becomes unavailable.
2. How does a secondary DNS server work?
Ans. A secondary DNS server works by periodically requesting zone transfers from the primary DNS server. It compares the serial numbers of the zone files to determine if there are any updates. If there are updates, it transfers the updated zone files to synchronize its database with the primary DNS server.
3. Why do I need a secondary DNS server?
Ans. A secondary DNS server provides redundancy and improves the overall reliability of the DNS infrastructure. It ensures that DNS resolution continues to work even if the primary DNS server is down or experiencing issues. Additionally, it helps distribute the DNS workload, improving performance and preventing bottlenecks.
4. How can I configure a secondary DNS server in RHEL?
Ans. To configure a secondary DNS server in RHEL, you need to modify the named.conf file and specify the primary DNS server's IP address as a "masters" entry for the respective zone. You also need to allow zone transfers from the primary DNS server in the named.conf.options file. After making these configurations, you can start the DNS service to enable the secondary DNS server.
5. What are the advantages of using a secondary DNS server?
Ans. Some advantages of using a secondary DNS server include: - Improved reliability: A secondary DNS server ensures that DNS resolution continues to work even if the primary DNS server fails. - Load distribution: By distributing the DNS workload, a secondary DNS server helps prevent performance issues and bottlenecks. - Redundancy: Having a secondary DNS server provides redundancy, reducing the risk of single points of failure. - Faster response times: With load distribution, a secondary DNS server can handle DNS queries more efficiently, resulting in faster response times for users.
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