| Availability | Within a time range, the ratio of the number of times the target service can be accessed normally to the total number of accesses. |
| Total Download Time | Monitor the total time consumed by a page, that is, the time from the start of monitoring to the end of monitoring. |
| Network Layer Time | When monitoring a page, the total time consumed by Network communication occurs. |
| Client Time | The total number of time segments during which Network communication does not occur when monitoring a page. |
| Base Page Download Time | The basic page is the time consumed by the WEB server. |
| Time to receive additional data | The monitoring task waits for additional data to occur. That is, the time elapsed from the completion of the page download to the last time additional data is received. |
| Page Load Time | The time it takes for the browser to make a series of preparations for the page to be accessed. That is, the time from the start of monitoring to the time when the browser status bar displays "Opening Page". |
| Redirection Time | Redirection Time is the elapsed time before receiving the first Element from the WEB server redirection instruction to RequestWEB server. |
| DNS Time | The time it takes to resolve a specified domain name into an IP address through the domain name resolution service |
| Connection Establishment Time | The time taken to establish a TCP/IP connection between the browser and the WEB server. |
| SSL Handshake Time | The time taken to establish a Secure Sockets Layer (SSL) connection between the browser and the WEB server. |
| Request Time | The elapsed time starts when the browser sends HTTPRequest and ends when the browser sends HTTPRequest. |
| Time to First Byte (TTFB) | The time it takes from the end of the browser sending HTTPRequest to receiving the first data packet returned by the WEB server. |
| Time to Last Byte | The time it takes for the browser to receive the non-first data packet returned by the WEB server. |
| Content Download Time | When monitoring a page, from the perspective of the page, the time it takes for the browser to receive non-first data packets returned by the WEB server. |
| Connection Termination Time | The time consumed by the browser to close the TCP/IP connection corresponding to Element, which corresponds to the connection established in the "Connection Establishment Time" indicator. |
| Number of Page Resources | The number of Element downloaded from the WEB server during browsing a page. |
| Redirect Count | During the process of browsing a page, a total of server Redirect Count occurred. |
| Total Page Size | The total number of Network communication bytes returned from the WEB server during browsing a page. |
| Total Resources Size | When downloading a certain Element in the page, such as image Element, CSSElement, the number of bytes returned from the WEB server. |
| Download Speed | Download Speed = Total Page Size / Network Layer Time. |
| Base Page Download Speed | Base Page Download Speed = Base Page Size / Base Page Download Time |
| Base Page Size | Base Page Size is the total number of bytes of the plain text HTML file |
| Data Downloaded by FCP | The browser displays the total number of bytes of Element contained in the first main page. |
| Number of Resources by FCP | The browser displays the total number of Element contained in the first main page. |
| DNS Lookup Count | During the process of browsing a page, including Element in the page, the total number of DNS resolutions occurred. |
| Total DNS Lookup Time | When browsing a page, including Element in the page, the total time spent on DNS resolution occurs. |
| TCP Connection Count | During the process of browsing a page, including Element in the page, the total number of connections established. |
| Total TCP Connection Time | During the process of browsing a page, including Element in the page, the total time it takes to establish a connection. |
| DOM Element Count | The number of DOMElement downloaded from the WEB server during browsing a page. |
| Failed Resource Count | During page browsing, the total number of elements where errors occur. |
| DOM Processing Start Time | domLoading for W3C metrics |
| Time to Interactive (TTI) | domInteractive for W3C Metrics |
| Time to Start Loading Content | domContentLoadedEventStart for W3C metrics |
| Time to Finish Loading Content | domContentLoadedEventEnd for W3C metrics |
| DOM Content Loaded Time | The domComplete metric in W3C timing |
| Onload Time | loadEventStart for W3C metrics |
