If the connectivity problem still not resolved then check the network cable from computer to HUB/Switch.

If the connectivity issue is with the particular computer, reinstall the driver of the NIC adapter and if the problem is still there then change the NIC adapter and reconfigure it.

Use the PING command at the common prompt to verify the connectivity with the other computer.

Check your firewall settings and make sure that the firewall is not blocking the incoming and outgoing traffic.

If you are behind a proxy server and facing internet connectivity issues, make sure that you have provided the accurate proxy server’s settings at the client computers.

Make sure that the lights on the Hub/Switch and LAN card are ON and working.

one end in the Hub/Switch and one in the LAN card.

Ensure that all the network cables are tightly plugged at both ends i.e.

Make sure that you have provided the accurate gateway address on all the computers.First thing to check it to make sure that you have the same class IP address and the associated subnet mask in all the computers in your LAN.Whenever you face connectivity issues, security issues and performance issues the following tips are helpful in diagnosing troubleshooting the problems. The best practice is to make inventory of all the resources of your LAN such as number of workstations, software installed and network hardware.įollowing section provides the useful tips in diagnosing and troubleshooting the most common problems in your LAN. Being a LAN/Network administrator it’s your responsibility that you are well aware of your LAN infrastructure, network hardware, software, user access rights and preferences and the major configurations of the network.

The problems in the Local Area Network can be aroused by a number of reasons as mention above. LAN/TCP/IP troubleshooting can often be tricky and the troubleshooting scenarios includes finding duplicate IP addresses on the network computers, misconfigured network applications, non-optimized network devices, low service performance, cabling problems, faulty LAN cards and network switches, viruses and spyware attacks, misconfigured firewall, security issues, DNS/DHCP problems, proxy server’s settings and overloading of the network servers with the number of software applications.

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