Interest in IP Version 6 (IPv6) is growing in many parts of the Internet technical community; see, for example, the announcement from ARIN on page 39 of this issue. Transition to IPv6 is likely to be one of the greatest technical challenges in the history of the Internet. Several groups are developing parts of the overall solution by creating IPv6capable versions of protocols such as the Dynamic Host Configuration Protocol (DHCP) or including support for IPv6 in the Domain Name System (DNS). Although not yet widely deployed, IP Network Mobility is expected to play an important part in the Internet of the future. For this reason the IETF is working on IP mobility with an eye toward IPv6. Our second article looks at the Network Mobility (NEMO) Basic Support Protocol, which is being developed by the NEMO working group in the IETF. Depletion of IPv4 address space is not the only concern for network operators and developers these days. Questions about the long-ter
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