Assignment handed out on Thursday, March 8, 2001
Note: Thursday's lecture will be on Naming
Due in Recitation on 3/9/2001:
- From the textbook, read Chapter 9 on naming. Skim over the case
studies, focusing on DNS.
Your writing/discussion assignment:
DNS and Grapevine have different models for maintaining the
consistency of name information. In particular, DNS is more lax about
consistency than Grapevine. Do you think it would be a better idea to
use Grapevine for name resolution on the Internet instead of DNS?
Take a side and discuss. If you prefer, base your answer using the
Consider the scenario where a network administrator enters the wrong
IP address for aduni.org into a root, authoritative DNS server just
before that IP address is propagated to a set of non-authoritative
servers. Contrast this to a scenario where an administrator enters a
wrong address while updating GrapevineRServer under the Grapevine
system. Assume the administrator does not realize the address being
entered is wrong.
Think about how the error might propagate throughout the network.
Consider how long it would take to rectify the error in each scenario.
Don't forget to consider the tradeoffs - you rarely get something for