Domain Name System (DNS)
(ระบบชื่อโดเมน (DNS))
Definition
Domain Name System (DNS) (ระบบชื่อโดเมน (DNS)) Hard Skill
The Domain Name System (DNS) is a hierarchical and decentralized naming system that translates human-readable domain names into IP addresses, allowing users to access websites and resources on the internet efficiently.
Expertise Level
Level 1
Basic
1. Understands the basic purpose and function of DNS.
2. Can explain how domain names map to IP addresses.
3. Familiar with common DNS record types like A, CNAME, and MX.
Level 2
Intermediate
1. Can configure basic DNS settings on a domain registrar or DNS server.
2. Understands DNS resolution process including recursive and iterative queries.
3. Can troubleshoot common DNS issues such as propagation delays and caching.
Level 3
Advanced
1. Can design and implement DNS infrastructure for large-scale or enterprise environments.
2. Understands and configures advanced DNS features like DNSSEC, load balancing, and failover.
3. Able to analyze and resolve complex DNS security and performance issues.
