Question

After the completion of the LAN installation, you are required to test the installation of local area computer networks. Ensure the following;
The LAN operates according to manufacturer`s and installation specifications.
The testing procedure meets the manufacturer`s guidelines and installation specifications.
The testing ensures that results are recorded according to installation specification

Answer 1

Testing a Local Area Network (LAN) installation involves several steps to ensure that it operates according to the manufacturer’s specifications and meets installation guidelines. Here is a comprehensive testing procedure:

### Pre-Test Preparation

1. **Review Documentation:**
- Gather all relevant documentation, including manufacturer specifications, installation guidelines, and configuration settings.
- Verify that the network devices (switches, routers, access points) are properly configured as per the documentation.

2. **Inventory Check:**
- Confirm that all network components (cables, connectors, devices) are present and in good condition.

3. **Initial Setup:**
- Ensure all devices are powered on and connected as specified.
- Check for a proper IP address allocation if using DHCP or manually assign IP addresses based on the network plan.

### Testing Procedure

1. **Connectivity Testing:**
- **Ping Test:**
- Use the `ping` command to check connectivity between devices within the network.
- Example command: `ping [IP address of another device]`
- Record the response times and packet loss (should be 0%).

2. **Speed Tests:**
- **Throughput Testing:**
- Use network testing tools (e.g., iPerf, NetFlow) to measure the bandwidth and throughput of the network.
- Perform tests between different devices to ensure that they meet the expected speeds as per specifications.
- Document the results for each test.

3. **Cable Testing:**
- Utilize a cable tester to ensure that all Ethernet cables are functioning properly and meeting standards (e.g., T568A/B pinouts).
- Record any faulty cables and replace them as necessary.

4. **VLAN Setup Verification:**
- If VLANs are configured, use network management tools or commands to check VLAN assignments and configurations.
- Ensure that devices within the same VLAN can communicate while devices from different VLANs cannot unless routing is set up.

5. **Wireless Network Testing (if applicable):**
- Measure signal strength and coverage using tools like HeatMapper or Ekahau.
- Connect a wireless device and check connectivity, speed, and performance. Record the observed RSSI (Received Signal Strength Indicator) and data rates.

6. **Performance Testing:**
- Conduct load testing with multiple users/devices to simulate real-world usage.
- Monitor and record any latency, jitter, or packet loss during heavy usage.

7. **Security Testing:**
- Check firewall settings and intrusion detection systems to ensure they are operational.
- Verify user access controls and permissions on shared resources.

8. **Failover Testing:**
- If redundancy is set up (e.g., failover mechanisms), simulate a failure in one component and check if the system reroutes traffic effectively.

### Post-Test Documentation

1. **Record Results:**
- Document all test results and observations in a structured format.
- Include details such as test date, devices tested, configuration settings, and outcomes.
- Use tables or charts for better presentation of results.

2. **Review Discrepancies:**
- Analyze any deviations from expected specifications.
- If issues arise, document them along with proposed solutions or configurations changes.

3. **Final Reporting:**
- Create a comprehensive report summarizing the testing process, results, and any corrective actions taken.
- Include an overall assessment of the LAN installation’s compliance with manufacturer specifications and performance metrics.

4. **Review with Stakeholders:**
- Share findings with relevant stakeholders (network administrators, IT department heads, etc.) for feedback and further action.

Following this procedure will help ensure that the LAN installation meets all performance and operational specifications as intended.