## Bar Charts: Network Protocol Performance Comparison ### Overview The image contains two bar charts comparing network protocol performance metrics across different software versions (3.1, 3, 2.9, 2.8, 2.7). Chart (a) shows throughput (10⁶ bit/sec), while chart (b) displays 90th percentile packet delays (seconds). Both charts use the same protocol categories (AntNet, OSPF, SPF, BF, Q-R, PQ-R, Daemon) and version color coding. ### Components/Axes **Chart (a): Throughput** - **X-axis**: Protocols (AntNet, OSPF, SPF, BF, Q-R, PQ-R, Daemon) - **Y-axis**: Throughput (10⁶ bit/sec), scale 0–45 - **Legend**: Version colors (3.1=blue, 3=maroon, 2.9=yellow, 2.8=cyan, 2.7=purple) - **Legend position**: Top-right **Chart (b): Packet Delays** - **X-axis**: Same protocols as chart (a) - **Y-axis**: 90th percentile packet delays (seconds), scale 0–10 - **Legend**: Same version colors as chart (a) - **Legend position**: Top-left ### Detailed Analysis **Chart (a) Trends**: - **Daemon** consistently shows highest throughput (43.2 max at 2.7) - **AntNet** has lowest throughput (37.1 at 3.1) - Version progression: 2.7 > 3 > 2.9 > 2.8 > 3.1 for most protocols - **BF** shows minimal version differences (36.8–38.4 range) - **Q-R** and **PQ-R** have near-identical performance across versions **Chart (b) Trends**: - **AntNet** has worst delays (9.5s at 2.7) - **Daemon** has near-zero delays (<0.1s) - Version progression: 2.7 > 2.8 > 3 > 2.9 > 3.1 for most protocols - **SPF** shows anomalous increase in 2.8 (1.2s vs 0.9s in 2.7) - **Q-R** and **PQ-R** have similar delay patterns (1.8–2.1s range) ### Key Observations 1. **Version Impact**: Higher versions (3.1) generally improve throughput but show mixed delay results 2. **Protocol Efficiency**: Daemon outperforms all others in both metrics 3. **AntNet Vulnerability**: Consistently worst performer in both charts 4. **Delay Anomaly**: SPF's 2.8 version has 33% higher delay than 2.7 5. **Throughput Plateau**: Protocols beyond Daemon show <5% performance variation ### Interpretation The data suggests protocol architecture has greater impact on performance than software version. Daemon's near-zero delays and high throughput indicate optimized design, while AntNet's poor performance suggests fundamental limitations. Version 2.7 consistently shows best throughput but mixed delay results, implying architectural changes between versions may prioritize different metrics. The SPF delay anomaly in 2.8 warrants investigation into version-specific optimizations or regressions. These findings could guide protocol selection for latency-sensitive applications versus high-bandwidth requirements.