Which statement describes IPv4 addressing?
- Routers use the full 32-bit IP address to determine the location of each individual host.
- The network portion of a destination IP address is obtained by performing an AND operation between a host IP address and a subnet mask.
- An IPv4 address contains two parts: a network portion and a subnet portion.
- Two hosts with the same subnet mask are in the same network.
Explanation: An IPv4 address consists of two parts: the network portion and the host portion. Routers just need to know the network portion of each IP address to forward the packet to its destination. When a router needs to identify the network portion of an IPv4 address, an AND operation is performed between the IP address and the subnet mask. The subnet mask identifies the network portion of the host IP address, not the network IP address itself, and that is why two hosts with the same subnet mask are not necessarily in the same network.
Exam with this question: Networking Devices and Initial Configuration Module 6.2.3 IPv4 Addressing Quiz
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