Table 9-6 Troubleshooting Tools for Wired and Wireless Networks

Table 9-6 Troubleshooting Tools for Wired and Wireless Networks - student2.ru

Tool How Used
   
Cable tester Tests network cables for proper wiring and operation
   
Loopback plug Tests network port or cable connected to network port
   
Punch-down tool Attaches TP cables to an RJ-45 jack
   
Toner probe (also known as tone Tests individual wire pair; more widely used with
and probe) phone lines than network cables
   
Wire stripper Removes outer jacket from TP cables
   
Crimper (also known as “crimping Attaches RJ-11 or RJ-45 plug to paired TP cables;
tool”) different crimping dies are needed for RJ-11 and
  RJ-45 plugs
   
Ping* Tests connectivity with another host on your network
  or a remote IP address or website
   
IPConfig* Displays IP address, subnet mask, gateway, DNS
  servers, releases and renews IP address, depending
  upon options used with program
   
Tracert* Traces route from your system to the specified IP
  address or website; checks up to 30 hops by default
   
Netstat* Displays TCP connections in use; can also display
  UDP connections and Ethernet stats, depending upon
  selected options
   
Nbtstat* Displays services running on your computer or a
  remote computer
   
Net* Displays and uses network resources
   
Wireless locator Detects wireless networks
   

*Windows command-line program; open command prompt to use this program

Use Table 9-7 to look up typical symptoms, problems, and solutions for wired and wireless net-work issues.


      Chapter 9: Troubleshooting 183
   
Table 9-7 Network Symptoms, Problems, and Solutions  
       
Symptom Possible Items to Check Typical Solution
  Cause    
       
No connectivity Wireless: Not Check the wireless Turn on the wireless network
  connected to connection. adapter (laptop) or remove/
  network.   reinstall the adapter with
      Device Manager (laptop/
      desktop).
      Open the wireless connection
      manager and provide creden-
      tials as requested to connect.
       
  Wired: Check the Ethernet Replace the cable if defective.
  Disconnected or cable.  
  defective net-    
  work cable.    
       
  No valid IP Check the IP Run IPConfig to check IP
  address. address. address. If IP address shows
      as 0.0.0.0, use IPConfig /
      releaseandIPConfig /renew
      to get new address from the
      DHCP server.
      If you cannot renew the IP
      address, reset the router.
       
  Router may be Check the router. Reset the Internet access
  out of service.   device, and then reset the
      router.
       
APIPA address Can’t connect to Check router. Reset the Internet access
  DHCP server.   device, and then reset the
      router.
       
Limited con- DNS server Check the DNS If the DNS server has the
nectivity may be out of server in use with same address as the gateway,
  service. IPConfig. reset the Internet access
      device, and then the reset
      router.
       
Local connec- Router may be Check the IP If the device has IP address in
tivity out of service. address with 169.254.x.x range, local con-
    IPConfig. nectivity only is possible.

Reset the Internet access device, then reset the router.

Table 9-6 Troubleshooting Tools for Wired and Wireless Networks - student2.ru

184 CompTIA A+ Quick Reference

Table 9-6 Troubleshooting Tools for Wired and Wireless Networks - student2.ru

Table 9-7 Continued

Table 9-6 Troubleshooting Tools for Wired and Wireless Networks - student2.ru

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