Which statement about IP subnetting is true?

Which statement about IP subnetting is true?

• A. It uses a subnet mask to delineate the network vs host portions.
• B. It enables faster encryption of traffic.
• C. It assigns IP addresses to devices randomly.
• D. It eliminates the need for DNS.

Answer: (B)

Subnetting hinges on how a subnet mask splits an IP address into a network part and a host part. The mask tells devices which bits identify the network so routers know where to send traffic, and which bits identify a specific device within that network. For IPv4, a common example is 255.255.255.0 (a /24): the first three octets define the network, the last octet identifies hosts in that network. This division lets you create multiple smaller networks from a larger address space, control broadcast domains, and simplify routing decisions. The statement about encrypting traffic isn’t tied to subnetting—encryption is a security feature that operates independently of how addresses are organized. Subnetting doesn’t dictate how addresses are assigned (static configuration or dynamic via DHCP), nor does it remove or replace DNS, which resolves hostnames to IPs regardless of subnet structure.

Subnetting hinges on how a subnet mask splits an IP address into a network part and a host part. The mask tells devices which bits identify the network so routers know where to send traffic, and which bits identify a specific device within that network. For IPv4, a common example is 255.255.255.0 (a /24): the first three octets define the network, the last octet identifies hosts in that network. This division lets you create multiple smaller networks from a larger address space, control broadcast domains, and simplify routing decisions.

The statement about encrypting traffic isn’t tied to subnetting—encryption is a security feature that operates independently of how addresses are organized. Subnetting doesn’t dictate how addresses are assigned (static configuration or dynamic via DHCP), nor does it remove or replace DNS, which resolves hostnames to IPs regardless of subnet structure.