Answer:
The issues that may be wrong are;
1) Improper connections
2) The drivers for the Network Interface Card, NIC card is not properly configured, installed, or missing
3) Reset the network settings
4) IPv6and ipv4 Compatibility
5) Other IP related IP issue
Explanation:
From the question, we have that Sandra has the required used and functional hardware for putting a new computer and a network together but her computer is not successfully able to connect to the network, which may be due to the following reasons;
1) Improper connections
Ensure that the connections are properly made and that the network cables are straight through when connected to a network or hub or crossover cables when connected directly between devices used for computing
2) The drivers for the Network Interface Card, NIC card is not properly configured, installed, or missing
When the issue is due to the drivers for the NIC card, it can be resolved by uninstalling and deleting the driver software from the computer and then rebooting the computer for the operating system (Windows 10 etc.) to search for and install the correct drivers for the used NIC
3) Reset the network settings
When the network settings are improperly configured or configured to a setting used in another network, it can lead to not successfully being able to connect to a network
The network settings should be reset
4) IPv6and ipv4 Compatibility
Ensure that the hardware are compatible to IPv6 and/or IPv4 and adjust the settings of the network as required
5) Other IP related IP issue
An IP issue can lead to not being able to successfully connect to a network which can be resolved releasing the IP and flushing the DNS cache.
