Which protocol is used by devices to request and obtain an IP address from a DHCP server?

The Dynamic Host Configuration Protocol (DHCP) is used to assign IP addresses dynamically to devices on a network. When a device joins a network, it sends a DHCP Discover message to find available DHCP servers. The server then provides an IP address, subnet mask, gateway, and other configuration details to the client, ensuring devices have the necessary network settings to communicate. Option A (ARP) is incorrect because ARP is used to resolve IP addresses to MAC addresses, not to assign IP addresses. Option B (ICMP) is incorrect; ICMP is used for network diagnostics and error reporting (e.g., ping), not for IP address assignment. Option C (FTP) is incorrect; FTP is used for file transfers, not for assigning IP addresses. Option E (DNS) is incorrect because DNS resolves domain names to IP addresses but does not assign those IP addresses.