Wednesday, March 2, 2011

Network Troubleshooting Commands

Troubleshooting computer network is one of the most important job description for network administrators, system administrators, network technicians and IT consultants. A computer network may have different types of problems as being infected with viruses and spyware, hacker attacks, can access by unauthorized users and may Connectivity problems due to failure of the faulty network devices or configurations face. The following is a list of basic network troubleshooting commands that are built into the Windows-based operating systems and UNIX etc. The right use of these commands can troubleshooting helps a lot in the diagnosis and solution of problems with your computer network.
Ping is the most important troubleshooting command and checks the connectivity with other computers. For example, your system’s IP address is and your network server’s IP address is and you can check the connection to the server by using the ping command in the following format.
At DOS command prompt, type ping and press Enter
When you receive the response from the server then the connectivity is ok and if you get the error message like this means to get “Request time out” so that there is a problem in connecting to the server.
IPconfig is another important command in Windows. It shows the IP address of the computer and it shows the DNS, DHCP, Gateway addresses the network and subnet mask.
At DOS prompt type ipconfig and press Enter to see the IP address of your computer.
inconfig In DOS prompt / all and press Enter to display the detailed information.
NSLOOKUP is a TCP / IP-based command and checks domain name aliases, DNS records, information on the operating system by query the Internet domain name server. You can correct the error with the DNS server on your network
Hostname command shows you the name of the computer.
At DOS prompt hostname and press Enter
NETSTAT utility shows a statistical protocols and the current established TCP / IP connections to the computer.
NBTSTAT helps to resolve the NetBIOS name resolution problems.
ARP displays and modifies IP Physical address translation table that is used by the ARP protocols.
Finger command is used to retrieve information about a user on a network.
Tracert command is used to determine the path of the remote system. This tool also provides the number of hops and the IP address of each hop. For example, if you see how many hops (routers) are involved to achieve,, and what the IP address of each hop is then to use the following command.
At the command prompt, type tracert you a list of all the hops and their IP addresses to see.
Traceroute is a very useful network debugging command and it is in the search for the server slows down the transmission on the Internet and it also shows the distance between the two systems are used.
Route command, you can manually make entries in the routing table.
Hopefully, the above commands will help you diagnose the troubleshooting computer networking problems.


  1. Hi Zaheer,

    this is gud info , but i required all the Troubleshooting information.. wat are the major problems occur in networking , i need the clear info ab that and i required commands.

  2. Thank u..for understaing basic troubleshooting...😊

  3. Very useful
    Thx JP at

  4. manque des exemples pour facilite la tache au neophites