The bandwidth level you select will affect overall scan performance:
High - Scan performance is optimized for high bandwidth usage resulting in the fastest possible scan time. The High bandwidth level will employ multiple scanners and high multiples of concurrent probes. While scans run at the High bandwidth level may be faster to complete, they may overload your network and/or its devices. For network scans, this level is recommended when scanning a large number of IP addresses with robust services.
Medium - Scan performance is optimized for medium bandwidth usage and fast scan processing of HTTP hosts (web servers). This level is the recommended setting.
Medium-low HTTP impact - Scan performance is optimized for medium bandwidth usage and low impact scanning of HTTP hosts (web servers).
Low - Scan performance is optimized for low bandwidth usage and low impact scanning of HTTP hosts (web servers).
Lowest - Scan performance is optimized for the lowest possible bandwidth usage and low impact scanning of HTTP hosts (web servers).
Each scan bandwidth level represents multiple settings. Compare the settings for each bandwidth level below.
|
Setting |
High |
Medium |
Medium-low |
Low |
Lowest |
|
Scanners used in parallel |
Multiple* |
1 |
1 |
1 |
1 |
|
Maximum hosts to scan in parallel (per scanner) |
25 |
15 |
10 |
2 |
1 |
|
Maximum total processes (HTTP and other) used to scan each host |
10 |
10 |
10 |
5 |
1 |
|
Maximum HTTP processes used to scan each HTTP host |
10 |
10 |
1 |
1 |
1 |
|
Packet delay |
Minimum |
Medium |
Maximum |
Long |
Long |
* The PCI compliance service continuously updates its scanning technology to ensure the best scan performance. For the High level, the number of scanners used may be adjusted over time.