Administering Windows Server Hybrid Core Infrastructure (AZ-800) Practice

In DHCP (Dynamic Host Configuration Protocol), when a client receives an IP address lease from a DHCP server, the lease has a specified duration, in this case, four days. The renewal process is defined to occur when a client attempts to extend its lease.

Clients start the renewal process when the lease is halfway through its duration. For a lease length of four days, this means that computers will first attempt to renew the lease after two days. This is done to ensure that the client retains its IP address and any other settings provided by the DHCP server, reducing the possibility of having to obtain a new IP address and reconfigure network settings.

By trying to renew at the halfway point, clients minimize the impact of a potential loss of IP address if the network conditions change or if there are limited available addresses in the DHCP scope. Thus, the correct answer is that computers will first attempt to renew the lease after two days.