Which three network characteristics are described in the scenario involving an employee logging into a company remotely?

The scenario involving an employee logging into a company remotely encompasses several important network characteristics, which include quality of service, fault tolerance, and security.

Quality of service is crucial in a remote access scenario because it ensures that the connection is reliable and meets performance expectations. This involves prioritizing network traffic to maintain the efficiency of essential applications and services, particularly when more users are accessing the network simultaneously.

Fault tolerance refers to the network's ability to maintain operational functionality despite the occurrence of failures or issues. In a remote access context, this means that the employee can still connect to the company’s resources even if certain components of the network experience problems. High availability solutions are implemented to quickly recover from outages and minimize disruption to users.

Security is a fundamental characteristic in remote access situations. When employees log in from external locations, protecting sensitive company data and communications is critical. Effective security measures, such as encryption protocols, secure authentication methods, and firewalls, are necessary to safeguard against unauthorized access and potential attacks.

Given that each of these characteristics plays a significant role in ensuring a seamless and secure remote access experience, the correct conclusion is that all of these characteristics are indeed relevant and necessary.