CREST Practitioner Security Analyst (CPSA) 2026 – 400 Free Practice Questions to Pass the Exam

Ethernet is primarily used as a system for connecting multiple computer systems to create a local area network (LAN). This technology facilitates the communication between devices within a limited geographic area, such as a home, office, or campus, allowing for data exchange and resource sharing.

The design of Ethernet incorporates both hardware specifications (like cables, switches, and network interface cards) and protocols to manage the transmission of data packets over the network. Its widespread adoption is due to its reliability, scalability, and support for high-speed data transfer.

While the other options reference technologies relevant to computer networking and internet access, they do not accurately describe Ethernet's function. Wireless connections pertain to different technologies, such as Wi-Fi, while high-speed internet access involves various service providers and infrastructures beyond Ethernet. Similarly, secure file transfer typically relies on protocols like SFTP or HTTPS, which are distinct from Ethernet's role in networking.