Windows 7 / Networking


Ping is of limited usefulness today because most new computers drop Ping requests (which use ICMP). Therefore, you might ping a computer that is connected to the network but not receive any response. Additionally, a computer might respond to Ping requests even if a firewall is dropping all other traffic-misleading you into thinking that you had connectivity.

However, Ping is still the best tool to easily monitor network connectivity on an ongoing basis. After using PathPing to identify network hosts that respond to ICMP requests, you can use Ping to constantly submit Ping requests and thereby easily determine whether you currently have connectivity to the host. If you are experiencing intermittent connectivity problems, a Ping loop will indicate whether your connection is active at any given time.

To start a Ping loop, run the following command.

ping -t hostname

Replies indicate that the packet was sent successfully, while Request Timed Out messages indicate that the computer did not receive a response from the remote host. The following example indicates how to monitor the connection to a host at the IP address

ping -t
	Pinging with 32 bytes of data:

	Reply from bytes=32 time=1ms TTL=64
	Reply from bytes=32 time<1ms TTL=64
	Reply from bytes=32 time<1ms TTL=64
	Reply from bytes=32 time<1ms TTL=64
	Request timed out.
	Request timed out.
	Request timed out.
	Request timed out.
	Request timed out.
	Reply from bytes=32 time<1ms TTL=64
	Request timed out.
	Request timed out.
	Reply from bytes=32 time<1ms TTL=64

Note that Ping loops provide only an approximate estimation of connectivity. Ping packets will occasionally be dropped even if connectivity is constant. Additionally, because Ping sends requests sooner if a reply is received than if the reply times out, you cannot use the ratio of replies to time-out errors as a useful indication of network uptime.

If you want to use Ping from a Windows PowerShell script, use the Test-Connection cmdlet. The functionality is almost identical to Ping, with the added benefit of being able to specify the -Source parameter to initiate the ICMP requests from a remote computer.

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In this tutorial:

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