ITPEC FE Morning April 2023 Question 31
ITPEC FE Morning April 2023 — Question 31 of 80
DNS (Domain Name System) — identify the role of DNS in a TCP/IP network.
DNS resolves human-readable names to IP addresses.
- •Domain names → IP addresses — DNS maps host names like
example.comto their corresponding IP addresses
Why not others:
- (a) — translating private IP to global IP is NAT (Network Address Translation)
- (b) — invoking a program by name without considering the server's IP is not a DNS function
- (d) — assigning an unused IP address from a pool in response to a request is DHCP (Dynamic Host Configuration Protocol)
Key rule: DNS = name-to-IP resolution. NAT = private-to-public IP translation. DHCP = automatic IP assignment.
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