Whats hot in networking? S. Keshav
Internet architecture Access Enterprise/campus/local ISP Wide area/backbone ISP
Access Evolution –28.8 -> High speed access ADSL bonded modems cable modem wireless access
Enterprise/campus Need capacity to link multiple workgroups Evolution –Hub/token ring -> hub/switch –IP over ATM -> fast IP routers –Firewalls Server architectures –cluster solutions
Wide area Proliferation of backbones – Dark fiber + routers = $$$ –Worldcom Evolution –slow routers -> ATM -> fast routers
Issues Quality of service/pricing Management Multicast DCOM Security
QoS/pricing Can’t have QoS without pricing –(at least in a public network) Per-flow QoS is expensive, hard to bill, and probably infeasible in the near term Macroscopic QoS –choosing aggregates –capacity planning
Management Key to get QoS in legacy in future networks Not well studied Need better tools –performance monitoring –problem detection and correction (multiple time scales) –configuration
Multicast Will never be dominant workload –that’s why RSVP is wrong Driven by audio/video multicast Many competing solutions
DCOM Distributed component object model Changes the way the network is used –DCOM is universal ‘middleware’ Effect on traffic is unknown
Security Hard to define, and harder to implement Hot topic
My research areas Network performance management Centralized approach to multicast Next-generation TCP Simulation