1. Chapter 38 Initialization & Configuration

2. Bootstrapping occurs during boot up to obtain boot program which may then load operating system may use network as part of the bootstrap process

3. IP Protocol Configuration Parameters IP address Default router address Subnet mask DNS server address WINS server Domain name

4. Automated Protocol Configuration Methods Reverse address resolution protocol Bootstrap protocol Dynamic host configuration protocol

5. Reverse Address Resolution Protocol RARP request RARP reply

6. Bootstrap Protocol Bootp request (fig 38.2)(fig 38.2) – uses IP broadcast packet with all 0’s in source address and 255.255.255.255 in destination IP address Bootp reply – Bootp server will provide client’s IP address, bootp server’s IP address, router IP address, bootp server hostname, and boot file name – Client will download file via TFTP

7. Dynamic Host Configuration Protocol RFC 1541 Built on top of bootp protocol(fig 38.3)(fig 38.3) DHCP server listens on UDP port 67 DHCP client transmits from UDP port 68 DHCP request/reply handshake – DHCP DISCOVER message broadcasted by client – DHCP OFFER reply from DHCP server – DHCP REQUEST broadcasted by client specifying chosen server – DHCP ACK message replied by chosen DHCP server Address lease duration from 1 day to permanent No interaction with DNS unless DDNS installed