# Last-mile Performance

## Overview

IP Network Last-Mile Performance shows the network quality between each PoP node and its end users in the corresponding service region. It includes data on ISP types, coverage, and average Ping latency. It usually has the following common use cases:

### Common Use Cases

<table><thead><tr><th width="268.41253662109375">Scenario</th><th>Description</th></tr></thead><tbody><tr><td>Site planning &#x26; PoP selection</td><td>Evaluate ISP quality in the target city or region</td></tr><tr><td>Coverage analysis</td><td>Compare end-user experience across multiple PoPs</td></tr><tr><td>Origin path optimization</td><td>Choose the ISP path with the lowest return latency</td></tr><tr><td>Performance auditing</td><td>Monitor Ping jitter and latency trends for a specific ISP</td></tr></tbody></table>

## Procedures

<div align="left"><figure><img src="https://3201622183-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F9X3FDdkCL2HzhbPpPMFt%2Fuploads%2F4QTj2dmhv6WGFMZwckDl%2Fimage.png?alt=media&#x26;token=9284c2ec-633f-407f-a5e6-0ae28f9351bc" alt=""><figcaption></figcaption></figure></div>

### Parameter Explanation

<table><thead><tr><th width="164.706298828125">Parameter</th><th>Description</th></tr></thead><tbody><tr><td>PoP Node</td><td>The source PoP for testing ISP connectivity. Test results vary by PoP. Only ISPs peered with Zenlayer are displayed.</td></tr><tr><td>Eyeball Location</td><td>The actual city/region where the end users are located, helping assess regional connectivity.</td></tr><tr><td>ISP Provider</td><td>The network provider serving the eyeball location.</td></tr><tr><td>Average Ping</td><td>The average latency from the PoP to the ISP, in milliseconds (ms). Lower and more stable values indicate better performance.</td></tr></tbody></table>

1. Select a PoP node, for example, Atlanta.\
   You will see the accessible eyeball ISPs from that PoP, along with the following information:
   * Number of covered ISPs
   * Each ISP’s name and region
   * Average latency (ms)
2. You can sort by latency to identify the top-performing ISPs.

## FAQ

**Q1: How to identify the best ISP?**\
A1: Look for the lowest **average Ping** and smallest **jitter (standard deviation)**. Top 3 ISPs are usually optimal.

**Q2: Does a small number of ISPs mean poor service?**\
A2: Not necessarily. Some regions may rely on a few major ISPs with strong performance. Evaluate both coverage and quality.

**Q3: Is packet loss shown?**\
A3: Currently, only average Ping values are available.

**Q4: Can ISP performance data be exported?**\
A4: Data export is not supported at this time.