Which statement correctly describes Class of Service (COS) routing? A. It determines the route a packet takes based on the path’s cost.
B. It makes routing decisions based on the packet’s Type of Service (ToS) bits.
C. It looks up route information from an administrator-configured database.
D. It makes routing decisions based on the packet’s service category.
The correct answer is B. It makes routing decisions based on the packet’s Type of Service (ToS) bits.
Explanation: Class of Service (COS) routing utilizes the Type of Service (ToS) field in an IP packet’s header to prioritize and manage network traffic. This allows routers to make decisions about where to send packets based on the service requirements indicated by those bits, supporting different levels of service and ensuring that more critical traffic can take precedence over less critical traffic.