Explain the entries in the lease file dhcpd.leases. How is the content of the lease file used when a DHCP client cannot contact the DHCP server?

What will be an ideal response?

```
lease 10.0.1.10 {
starts 4 2003/11/19 05:30:53;
ends 4 2003/11/19 05:40:53;
binding state active;
next binding state free;
hardware ethernet 00:50:bf:75:16:95;
```
The lease file contains the DHCP lease information for each recently assigned IP address. For
each IP address the lease entry includes:
1. Start date and time of the lease.
2. End date and time of the lease.
3. MAC address of the host to which the lease was assigned.
4. A unique lease identifier which depends upon the client hardware and the assigned network address.
When the DHCP client cannot contact the DHCP server or the first time the DHCP service is
started, it will fail unless the lease database exists. This file is required for starting the server for the first time. Every time a lease is acquired, renewed or released, its new value is recorded at the end of the lease file. So if more than one declaration appears for a given lease, the last one in the file is the current one. From time to time, dhcpd removes obsolete information to prevent the file
becoming too large.