- DHCP stands for Dynamic Host Configuration Protocol.
- Used to assign IP automatically to the devices in the network.
- When ever a machine requests for the IP, DHCP checks the available IPs and assign into the network.
Why we need DHCP?
- As we know every network device in the network needs the IP to communicate.
- If we have organisation with multiple computers we need to assign a IP to each computer.
- While assigning IP we may assign single IP to Both computers.
- In order to reduce this we use DHCP.
How to config?
- DHCP can be configured on the Router or on the Server.
- For both almost steps are same.
- Below are the Config Steps
Starting IP and Ending IP:
- For every DHCP we need to give certain range of IP to assign with in the network.
- Starting IP is the initial range assigning IP.
- Ending IP is the last IP in the range.
Reservation :
- Assigning a specific IP to the particular Machine in the network.
- It stores the information of the Machine MAC address,Host Address.
Some Other Terminologies
Scope: It is range of IP Address assign to computers in single network.
Super Scope: It is range of IP Address assign to computers in multiple networks.
What is Leasing IP?
- Every DHCP server assigns a IP with particular period of time, after that period it must be reassigned.
- By default leasing time is set for 8 days.
- When ever the leasing time comes to half period the client requests the DHCP for the renewal.
- If Client is off or not in connect state on the expiring date, IP terminates.