Cisco Certified Network Professional 2026 – 400 Free Practice Questions to Pass the Exam

A larger window size in networking, particularly in protocols like TCP (Transmission Control Protocol), allows for the transmission of more data before requiring an acknowledgment back from the receiver. This is especially significant in high latency conditions, where round-trip times (RTTs) are longer. By increasing the window size, a sender can send a larger amount of data without waiting for each individual acknowledgment, making more efficient use of the available bandwidth.

This is why the correct choice highlights improved performance under high latency conditions. The larger amount of data being transmitted can keep the pipeline fuller, reducing the time that the sender has to wait for acknowledgments and leading to better utilization of the available network resources. In environments with high latency, this can lead to a noticeable improvement in throughput and overall performance.

Other options, such as increased likelihood of packet loss or slower transmission rates, do not directly relate to the benefits of having a larger window size. A larger window is aimed at improving data flow rather than impeding it, and while high window sizes can theoretically lead to congestion and packet loss, this is not a direct implication of simply having a larger window size under normal conditions.