A router and a switch serve different functions in a network.

A router is responsible for connecting multiple networks together and directing data packets between them. It determines the best path for data to travel using IP addresses.

A switch, on the other hand, operates within a single network and connects devices like computers, printers, and servers. It uses MAC addresses to forward data within the local network (LAN).

A. A router operates at layer two, while a switch operates at layer three of the OSI model – Incorrect. A switch operates at Layer 2 (Data Link Layer), while a router operates at Layer 3 (Network Layer).

B. A router transmits data through frames, while a switch sends data through packets – Incorrect. Switches use frames at Layer 2, while routers use packets at Layer 3.

C. A router connects networks, while a switch connects devices within a network (Correct Answer) – This correctly differentiates their functions.

D. A router uses a media access control (MAC) address during the transmission of data, while a switch uses an internet protocol (IP) address – Incorrect. A switch uses MAC addresses, and a router uses IP addresses.

IIA GTAG 17 – Auditing IT Governance discusses network security and the role of routers and switches.

COBIT 2019 – DSS01 (Managed Operations) emphasizes secure and efficient network management.

NIST SP 800-53 – Security Controls for IT Systems includes guidelines on network architecture and device functionality.

Explanation of Each Option:IIA References: