Addressing
IP addresses are an increasingly scarce resource
- 232 used to seem like such a large number
IP does use space more efficiently than PSTN
Long term solution: IPv6
- 2128 still less than number of atoms in universe…
Short-term fixes have been effective
- dynamic address allocation (PPP, DHCP)
- CIDR
- NATs, private address blocks (e.g., 10.x.x.x)