In this scenario, a field technician is sent to replace a defective network interface card (NIC) on PC1. After the NIC was replaced, PC1 still could not access resources from server S1. The technician then uses the substitution method of troubleshooting by swapping the NICs between PC1 and PC2. Now, neither computer can access resources on server S1. The field technician calls you to determine the issues.
1. What could be the reason the switch is not allowing these PCs to access the resources in server S1?
2. How would you solve this issue?

A possible break along the network line from PC1 and PC2 cable. Or the the network configuration has been altered

Explanation:

When a network cable transmitting signals from a system to a server experiences truncation along it path, the unit that is broken ceased to send packages across to the server.

When the technicians performed the swapping techniques between the two PCs and the outcome remained the same, it was a clear pointer to the fact that it wasn't an NIC issues.

On the other hand, run an ipconfig command on the command prompt to find out if packages received are not truncated. If it is. Then verify the new IP address and align it with PC1 and PC2.