There are situations where some pc, servers should have fixed ip always. One way to do is assign static ip to those devices. But since DHCP intend to go away from static mappings there is way we can reserve a IP address for a device using DHCP config. So when the particular computer or device request IP from DHCP server it will check with its IP reservation rules and issue the IP address define on…
For any host to perform any communication it must have an IP address. When we take a network to each host need to have an ip address to function in network. When the number of hosts increases assigning IP addresses to them (manually) become issue. Especially when you move in to IPv6 the addresses are more complex as well. There for its better to have mechanism to assign IP addresses automatically…