User experience score
The user experience score in Connection Dynamics tells you at-a-glance how well a TCP conversation performed.
 
Figure 46: User experience score
 
The score is a number on a scale of 1-10, and a color is given to each conversation. A value is given to each of these four categories: network, client, server, or application. The values are combined and the final user experience score is the lowest of the four categories.>
Table 9. Supported Operating Systems
Port
Functionality
Score
Performance
Color
0–5
Poor
Red
5–8
Marginal
Yellow
8–10
Good
Blue
The user experience score is derived from metrics such as round trip network and connection delay, transfer rates, retransmissions, whether clients and servers respond to requests, and a number of others.
When a category has poor or marginal performance not only is a color-coded score provided, but also details regarding why the user experience score was lowered. Even good scores may show some of these messages. Using these messages you can assign trouble tickets to the proper team. Some examples:
Network
Round-trip network delays
Packet loss and retransmissions delaying connection setup
Packet loss and retransmissions preventing connection setup
Packet loss and retransmissions slowing data transfer
Long data transfer times at slow speeds
Client
Busy client reducing server transfer speed
Server
Busy server reducing client transfer speed
Unresponsive server during connection setup
Busy server slowing connection setup
Taking too long to respond to requests
Application
Taking too long to respond to requests
Slow data transfer due to a high rate of request/response cycles
Slow data transfer due to inefficient use of TCP