ITPEC IP October 2022 Question 30
ITPEC IP October 2022 — Question 30 of 100
A subnet mask separates the network portion of an IP address from the host portion. Mask bits set to 1 identify the network prefix, while the remaining bits identify a host within that subnet. Applying a bitwise AND between the IP address and mask yields the network address.
Answer (b)
Why not others:
- ARP resolves an IPv4 address to a local MAC address
- NAT maps private and global IP addresses
- DNS maps domain names to IP addresses
Key rule: The subnet mask defines prefix length and therefore determines which addresses belong to the same IP subnet.
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