A broadcast IP address is used to send a message to all devices on a specific IP subnet. This address is
the highest address in the subnet (i.e., all host bits set to 1).
Example: In 192.168.1.0/24 → broadcast is 192.168.1.255.
It is used for purposes like ARP requests or DHCP discovery.
Option A is correct – refers to all hosts in a subnet.
Option B refers to multicast, not broadcast.
Option C might refer to anycast, which is different.
Option D describes a unicast address.
Reference:
Nokia IP Fundamentals Study Guide – Chapter: "IP Addressing and Broadcast Communication"
RFC 919 – Broadcasting Internet Datagrams
