Endpoint Agent TCP Support
- SACK-based measurements
- SYN-based measurements
SACK-based network measurements require a single TCP connection to perform the measurement, whereas SYN-based measurements use a stream of up to 50 SYN packets, each being sent from a unique source TCP port. For this reason, SACK-based measurements are preferred. However, some networks do not support SACK, and so SYN is necessary.
- Large enterprise networks often block ICMP packets entirely to protect against device discovery.
- For networks running QoS or similar configurations, ICMP packets are often assigned a low priority, and packet loss/latency can occur.
- ICMP packets take different routes to TCP packets, and are often slower.
TCP support is available for Endpoint Agent version 1.75.0 and above.