Which of the following is NOT an advantage of unicast over multicast communication?

Unicast communication is designed for point-to-point transmission, where data is sent from a single sender to a specific receiver. This method offers several advantages, making it a preferred choice in certain scenarios.

The statement regarding multicast being able to cross a router without issues highlights a key characteristic of multicast communication. Multicast allows the dissemination of data to multiple receivers simultaneously, which means routers are designed to handle multicast traffic efficiently. Routers manage multicast routing protocols to ensure that data packets are sent only to those network segments where receivers have expressed interest in the multicast stream.

Choosing unicast gives specific advantages such as simplicity in managing connections, potentially lower latency since each transmission is dedicated and targeted, and the ability to reduce strain on network infrastructure, especially trunk lines, by minimizing unnecessary broadcast traffic. Each of these benefits speaks to the design and use cases where unicast excels.

In contrast, the ability of multicast to traverse routers highlights a situation where multicast has advantages over unicast regarding network traffic management and efficient data dissemination. Thus, recognizing the nature of these transmission methods helps clarify the distinction in their strengths and applicable contexts within network communications.