Yet to be Resolved
Long held adaptive flows are susceptible to network layer shaping.
Short held flows (WWW transactions)
- Are not very susceptible to network layer shaping
- Modify stack behavior by augmenting initial cwnd?
UDP flow management
- Unicast flow model (ingress filter or sender moderation?)
- Multicast flow model (multi-layering of the signal?)
Inter-Provider semantics for differentiated services.
Notes:
Some other unanswered questions still are being examined, such as non-adaptive flows and bit semantics interpretation between different administrative domains.
The IETF Integrated Services working group has begun examining these issues in an effort dubbed “Differential Services” (diffserv). More information can be found on diffserv efforts at:
http://diffserv.lcs.mit.edu/