Troubleshooting scenarios

In this section, you will get acquainted with some of the possible scenarios of problems that may occur with end devices, network devices, default gateways, and DNS.

IP addressing issues on networking devices

Network devices that exclusively use IP addresses for communications are routers and servers. There may be situations when on these devices, IP addresses are assigned by DHCP; however, that is rare. Usually, these devices have static IP addresses and are assigned by the network administrator. From that, if a router does not have assigned IP addresses on its network interfaces, then two or more networks cannot communicate with each other.

Similarly, if the server does not have an IP address, then the services provided are not accessible by the clients. Obviously, these situations cause a breakdown of network services. That being said, to overcome these issues, the network administrator should be vigilant with routers and servers. Thus, the following commands are...