Whats hot in networking?
S. Keshav
Internet architecture
• Access
• Enterprise/campus/local ISP
• Wide area/backbone ISP
Access
• Evolution
– 28.8 -> High speed access
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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
– http://www.caida.org/Tools/Mapnet/Backbones/
• Dark fiber + routers = $$$
– Worldcom
• Evolution
– slow routers -> ATM -> fast routers
Issues
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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
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Network performance management
Centralized approach to multicast
Next-generation TCP
Simulation