Common network issues

Many issues network professionals encounter while troubleshooting networks are limited to particular client devices. In these cases, network professionals notice that all of the other clients on the network are operating correctly while the client in question exhibits issues. Here, network professionals should examine the network configuration on the client machine itself, paying particular attention to the possibility of the following:

• IP address duplication: In many networks with poor documentation practices, IP addresses may be reused on multiple clients, resulting in duplicate IPs on the network and poor/non-existent connectivity for the clients. For this reason, many professionals will ping the IP address they intend to use before configuring the IP address on a machine to check whether any other hosts are utilizing the intended address. However, many firewalls filter the Internet Control Message Protocol (ICMP) messages used by the ping tool, resulting...