Final answer:
A DHCP lease is a temporary IP address assignment to a device from a DHCP server. It is obtained through a process known as the DHCP handshake, involving the device sending a request and the server responding with an offer and finalizing the lease.
Step-by-step explanation:
The concept of a DHCP lease refers to the temporary assignment of an IP address to a device on a network by the Dynamic Host Configuration Protocol (DHCP) server. When a device connects to a network, it requests an IP address. The DHCP server assigns an available IP address for a specified duration, known as the lease time. After the lease time expires, the device must request a new lease to maintain network connectivity.
To obtain a DHCP lease, the device sends a broadcast request to the network. This request is known as a DHCPDISCOVER message. The DHCP server responds with a DHCPOFFER message, offering an IP address to the device. The device then sends a DHCPREQUEST message to the server to accept the offer, and the server finalizes the lease with a DHCPACK message, which includes the IP address and other network configuration details. This process is called the DHCP handshake.