Attention:Its incomplete,may not be exactly what the speaker spoke !
Speaker is not responsible for any of the mistake that may be present here.
Its just how i understood about the talk :)
Its for every1 who missed the talk today.
Friends it was not so techy but it was simple short n sweet talk.
Google for the keywords and u will be find the reliable source.
Every sub topic had a "lesson learned" inference.
Lessons Learned From The Internet
Douglas E Comer
Architecture
Structure:Network vs Internet
former means single large network and later is network of network.
pros and cons of these structures.
Interconnection:Application vs Packets
gatewaying not possible for each service or application
so we go for routers, which work at packet level
Vareity of underlying networks
different types of DLL protocols have to be taken care of.
Technology
virtual system
packet->ip
coaxial cable->hub->switch
switch->VLAN switch -> Layer 3 Switch
router->virtual router
or simply an abstraction is required for providing a simple interface
Sending bits rapidly
ranging slowest possible speed to 40Gbps
Economics
Effect of commercialization
Peering arrangements
Internet routing not based on shortest path.
Cost of packets vs circuits
Making money in networking
Economics and QoS
Protocols
Power of IP
simple elegant ... and thats why it has triumphed as a winner
Achieving Reliable Transfer
X.25 is poor. retransmission happens at 2 layers which are no in sync
(google it)
retransmission should be end to end
Future of LAN protocols
Aggressive retransmission
i guess he could have meant fast retransmit...not sure
congestion is a factor too
Internet Address Model
end to endness but now bcas of nat it isnt true.
so a lesson learned
Layering
Design of protocol layering
clearly specifiying which layer does what.
lesson learned is since it was properly done TCP/IP rules
and works over any underlying n/w
Permutation of layers
he was questioning why PPPoE should exist, because PPP is meant for
point to point
whereas IP is multicast based
similarly VPN,iSCSi(he simply mocked taking MS booting over iSCSI and
laughter followed),EoIP,TDMoIP,IP over IP
Conducting Research
NSFNET vs DARPA
OSI vs TCP/IP
Unresolved Problem
Understanding Internet
like how it works.
traffic behavior should be observed not just taking a tiny topology
but a real time one.
should not be optimized but should look at tradeoff.
managing the internet- n/w management node to topological level.
Fiber in the internet- how to use switched lambda in packet switching.
routing in internet.
route flopping and black holes - must google ! as its still unresolved
Internet by-products
Digi Cam, VoIP, Video services
basically anything that evolved bcas of internet boom
--
Dinesh Uthayakumar
Final Year
Bachelor of Technology - Information Technology
Velammal Engineering College
Chennai