BOOTP (contd)
- BOOTP requests/replies sent w/ DF bit set.
Server can send reply via broadcast or unicast:
- For unicast reply, BOOTP server knows the IP address, but the link layer address is not in the ARP cache
- Note that the server cannot send an ARP message because client does not know its IP address
- Server can use ioctl(8) {or arp -s } to set the value of the cache => can do this only if it has permission