DHCP Dynamic Host Configuration Protocol What is DHCP? • DHCP Dynamic Host Configuration Protocol एक client/server प्रोटोकॉल है जो network host को automatically IP addresses provide करता है | • DHCP Client Server Model पर based है | What are the advantages of DHCP? Advantages of DHCP Server. • Centralized IP- address management • Provide automatically IP-Address for client • Make administration easy. What is DHCP Scope? DHCP scopes are used to define ranges of addresses from which a DHCP server can assign IP addresses to clients. Give some devices which act as DHCP Server? • ADSL Router (MODEM) • Router • Server PC Name different types of DHCP Scope in windows? • Normal Scope-it is used to assign IP-Address Range for v Class A,B & C network including subnet masks, exclusions and Reservation, • Multicast Scope-it is used to assign IP-Address Range for class D networks. – Multicast scope doesn’t have subnet Reservation or other TCP/IP Options. masks, • Super scope- essentially a collection of scoops grouped together such that they can be enabled or disabled as a single entity. What is address pool? Address range for distribution is called address pool. What is address leases? Address leases define client IP Address, Computer Name, lease expiration date etc. What are IP-reservations? It provides information for a reserved client. For this MAC address of client pc is required. What is exclusion range? IP-Address in this range will not assign to any client pc. These IP-Addresses excluded from distribution. What is the use of filter in DHCP Server? • Allow—DHCP Services are provided to any MAC addresses in this list. • Deny---DHCP Server are denied to any MAC addresses in this list. What is DORA Process in DHCP? Ans. DORA process explains that how DHCP assign IP-address for the client. DORA is the combination four processes.     Discover Offer Request Acknowledge In this process client broadcast a discover message to all network devices to find out the DHCP server. Discover message contains source port no 68 and destination port no 67. DHCP server received this message and broadcast offer message to all the network devices but this message contains MAC address of the client PC, only this PC read the message in this message DHCP server offer IP-Address for the client. After reading offer message client pc again broadcast a request message to the DHCP server and request for the offered IP-Address. DHCP Server read this message and broadcast an acknowledgement message and assigns an IPaddress on the client PC this whole process is called DORA process. What is DORA Process in DHCP?