DHCP Overview
Dynamic Host Configuration Protocol As the name suggests this protocol is used to dynamically assign the IP address, DNS, Default gateway and other intended parameters to the requesting client. DHCP Servers are configured with scope or pool of IP addresses. We can set up IP exclusions for ip addresses which we do not want to be scoped or assigned dynamically. MAC based reservations are also possible which reserve an IP address to a particular machine even when it gets assigned dynamically. Other attributes like DNS, Default gateway can be included in the DHCP messages under OPTIONS. Default gateway as Option 3. DNS server is included as Option 6, Lease time as to how long a machine can use the IP address assigned under Option 51 The client sends an initial broadcasts in the network in the form of a Discovery message requesting for its IP addresses and other details. The DHCP server in the network responds to the client by sending an Offer message. The...