Netscout OneTouch AT 10G, Руководство пользователя

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Chapter 5: User Tests
Web (HTTP) Test
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DNS Lookup is the amount of time it took to resolve the URL to an
IP address. If you enter an IP address, DNS lookup is not required,
so dashes will be displayed to indicate that this part of the test
was not executed.
TCP Connect is the amount of time it took to open the port on the
server.
Data Start is the time it took to receive the first frame of HTML
from the web server.
Data Transfer is the amount of time it took to receive the data
from the target server.
Total Time is the end user response time (EURT), which is the total
time it took to download the web page. It is the sum of DNS
lookup, TCP connect, data start, and data transfer time. If the
Total Time exceeds the Time Limit you selected the test will fail.
If the Time Limit is exceeded during test, the current phase of the
test (DNS, Lookup, Data Start, or Data Transfer) is marked with a
red X and the test is aborted.
Data Bytes is the total number of data bytes transferred. Header
bytes are not included in the measurement.
Rate is the data transfer rate.
A ping test runs simultaneously with the HTTP test. If the HTTP
test finishes before the ICMP echo reply packet arrives, dashes will
be displayed for the ping test results. Ping results do not affect
the Pass/Fail status of the test.
Return Code specifies the end-of-test status or an error condition
if encountered. Plain text descriptions of the errors are displayed
at the bottom of the screen.
Below the Return Code, the target server address(es) are
displayed. If you specified a target server’s URL, these addresses
are supplied by DNS servers.