Key points
- Usable hosts in a subnet = 2^(host bits) − 2.
- TCP congestion: window doubles in slow start, +1 MSS per RTT after the threshold.
- On timeout, threshold = cwnd / 2 and cwnd = 1 MSS.
Computer Networks
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Computer Networks
CH 01Frequently asked formulas
Formulas & facts
- Transmission delay
- L / B
- Propagation delay
- d / v
- Stop & wait efficiency
- 1 / (1 + 2a), a = Tp / Tt
- GBN / SR window
- N / (1 + 2a)
- Min frame (CSMA/CD)
- L ≥ 2 × Tp × B