1. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 1 Lesson 16 Dynamic Host Configuration Protocol (DHCP)

2. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 2 Dynamic Host Configuration Protocol (DHCP) Key benefits of DHCP Overview of DHCP in Windows Server 2003 How DHCP works DHCP message format DHCP messages DHCP options

3. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 3 Key Benefits of DHCP Centralized administration of IP configuration Seamless IP host configuration Flexibility Scalability

4. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 4 Overview of DHCP in Windows Server 2003 What Is DHCP? DHCP clients and servers DHCP scopes and options Options classes DHCP messages DHCP leases and reservations DHCP relay agents

5. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 5 Overview of DHCP in Windows Server 2003 (continued) Unauthorized DHCP server detection APIPA DNS integration Routing and Remote Access service integration Multicast scopes BOOTP support

6. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 6 How DHCP Works Obtaining an initial lease Renewing a lease DHCPDISCOVER DHCPOFFER DHCPREQUEST DHCPACK DHCPREQUEST DHCPACK DHCP client DHCP server

7. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 7 Changing Subnets and DHCP servers DHCPDISCOVER DHCPOFFER DHCPREQUEST DHCPACK DHCPREQUEST DHCPNACK DHCP clientDHCP server

8. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 8 Detecting Unauthorized DHCP Servers DHCPINFORM DHCPACK Initialized DHCP server Initializing DHCP server

9. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 9 Message Type Hardware Type Hardware Address Length Hops Transaction ID Seconds Flags DHCP Message Format Carried by UDP Client UDP Port 68, Server UDP Port 67

10. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 10 DHCP Message Format (continued) Client IP Address Your IP Address Server IP Address Gateway IP Address Client Hardware Addr Server Host Name Boot File Name Magic Cookie DHCP Options... 16 bytes... 64 bytes... 128 bytes...

11. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 11 DHCP Messages DHCPDISCOVER Client requesting an IP address DHCPOFFER Server offering a lease DHCPREQUEST Client requesting a specific lease DHCPACK Server confirming lease

12. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 12 DHCP Messages (continued) DHCPDECLINE Client refusing offered address DHCPNACK Server denying lease DHCPRELEASE Client relinquishing its lease DHCPINFORM Client requesting additional configuration information

13. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 13 DHCP Options Option Type Option Length Option Data... x bytes Option Type or

14. Microsoft Windows Server 2003 TCP/IP Protocols and Services Technical Reference Slide: 14 Review Key benefits of DHCP Overview of DHCP in Windows Server 2003 How DHCP works DHCP message format DHCP messages DHCP options