Which of the following describes the bandwidth of a single FT1?

The bandwidth of a single FT1, also known as Fractional T1, is defined as 64 Kbps. This makes it suitable for smaller businesses or specific applications that require a dedicated connection with a capacity lower than the full T1 line, which provides 1.544 Mbps total bandwidth. Each FT1 channel is essentially a fractional segment of the T1 line, and since each channel operates at 64 Kbps, this indicates that a single FT1 is utilized to manage a lower bitrate while still ensuring reliable point-to-point communication at that specific capacity.

The other options indicate bandwidths that either exceed or fall short of the correct bandwidth for a single FT1. For instance, 128 Kbps represents the combined capacity of two FT1s, while 256 Kbps and 32 Kbps do not align with the established capacities of FT1 configurations. Understanding this allows for effective planning and implementation of network resources based on the required data throughput.