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\doheading{2}{title}{Name: Hung Q. Ngo}       
\htitle{Paper: Is IP going to take over the world (of communications)?}
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{\bf 1. Problem the paper is addressing}

The paper examine closely several key assumptions about IP and packet 
switching in general. The examination forces us to re-think carefully
the pros and cons of packet switching, its relationship with other
techniques and protocols that might have been overlooked due to
commonly held assumptions in the networking world.

{\bf 2. Main contribution of the paper}

The paper successfully debunked several common ``myths'' or believes
around packet switching, and the IP protocol in particular. It was 
quantitatively shown that packet switching/IP is not necessarily more
dominant, more efficient, more robust, nor simpler than its circuit 
switching counter-part.

{\bf 3. Key ideas}

All of the aforementioned folklores were carefully considered with
concrete measures, instead of simple ``textbook'' examples and
qualitative reasongin which sometimes give us a false sense of reality.

{\bf 4. Critique of the main contribution}

The paper deserves a rating of 3.5 (somewhere between 3 and 4). 
Its writting is thourough and convincing.
The supported data can be checked by any reader. 
The idea that packet switching may not be as efficient/robust/simple
as one may think is not new. See, for instance, RFC 3439.
What is new is that this is coming from academic folks who supposedly
are in the Internet camp instead of the telephone companies' camp.

What the paper failed to dig deeper into is that, while IP and packet switching
in general may not be as we assumed, its growth rate could in principle
changes the landscape completely in a few years. It is unfair to compare
infrastructures of a relatively new technology like the Internet
to the more than 100 year-old telephony world.
The efficiency of IP vs. circuit switching needs a much more
concrete study to say definitely which is more efficient.
Over-provisioning makes it hard to say at this point.
Last but not least, the conclusion that designing the Internet 
with circuit switching at the core and packet switching at the edge
is pre-mature. 

{\bf 5. Open problems arising from the work}

There are various interesting problems for further studied.
I have mentioned some of them in the previous section.
A very interesting problem is to study the performance
of a network combined of PS and CS to see which kind of combination
is the most effective under which circumstances (traffic load, technologies,
application requirements, etc.)

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