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Troubleshooting Network Issues

Users often rely on network connectivity to do their jobs, and network failures can dramatically affect an organization's productivity. When failures occur, you need to quickly diagnose the problem. You will often need to escalate the troubleshooting to a network specialist. However, you can diagnose and resolve many common networking problems from a computer running the Windows 7 operating system.

This tutorial describes how to use important network troubleshooting tools and provides step-by-step instructions for troubleshooting common network problems.

In this tutorial:

  1. Tools for Troubleshooting
  2. Table-1 Network Troubleshooting Tools
  3. Arp
  4. How to Identify a Problem with the ARP Cacher
  5. How to Clear the ARP Cache
  6. Event Viewer
  7. IPConfig
  8. Nblookup
  9. Nbtstat
  10. Net
  11. How to View Shared Folders on the Local Computer
  12. How to View Shared Folders on Another Computer
  13. Netstat
  14. Network Monitor
  15. Nslookup
  16. Verifying that the Default DNS Server Resolves Correctly
  17. Verifying that a Specific DNS Server Resolves Correctly
  18. Verifying Specific Types of Addresses
  19. Using TCP for DNS Lookups
  20. PathPing
  21. PathPing Output
  22. Routing Loops
  23. Performance Problems
  24. Possible Connectivity Issues
  25. No Connectivity Issues
  26. Performance Monitor
  27. Data Collector Sets
  28. Windows Resource Monitor
  29. Ping
  30. PortQry
  31. Identifying the TCP Port for a Service
  32. Windows 7 Testing Service Connectivity
  33. Determining Available Remote Management Protocols
  34. Why PortQry Is Great
  35. Route
  36. Task Manager
  37. TCPView
  38. Telnet Client
  39. Testing Service Connectivity
  40. Test TCP
  41. Windows Network Diagnostics
  42. The Process of Troubleshooting Network Problems
  43. How to Troubleshoot Network Connectivity Problems
  44. How to Troubleshoot Application Connectivity Problems
  45. Default Port Assignments for Common Services and Tasks
  46. How to Troubleshoot Name Resolution Problems
  47. How to Verify Connectivity to a DNS Server
  48. How to Use the Hosts File
  49. How to Troubleshoot Performance Problems and Intermittent Connectivity Issues
  50. How to Troubleshoot Joining or Logging on to a Domain
  51. How to Verify Requirements for Joining a Domain
  52. How to Troubleshoot Network Discovery
  53. How to Troubleshoot File and Printer Sharing
  54. How to Troubleshoot File and Printer Sharing from the Client
  55. How to Troubleshoot File and Printer Sharing from the Server
  56. How to Troubleshoot Wireless Networks
  57. Network Diagnostics
  58. How to Troubleshoot Firewall Problems