Which three statements about DWDM are true? (Choose three)
Click on the arrows to vote for the correct answerA. B. C. D. E. F.
DWDM (Dense Wavelength Division Multiplexing) is an optical communication technology that enables multiple optical signals to be carried on a single fiber by using different wavelengths of light. Here are the three statements that are true about DWDM:
A. It allows a single strand of fiber to support bidirectional communications DWDM uses different wavelengths to transmit data over a single strand of fiber in both directions. This means that it can support bidirectional communications over a single fiber, allowing for more efficient use of network resources.
B. It is used for long-distance and submarine cable systems DWDM is commonly used for long-distance communication networks, such as submarine cable systems, which require high bandwidth and high capacity. It is also used in metropolitan area networks and data centers to transmit large amounts of data over long distances.
C. It can multiplex up to 256 channels on a single fiber DWDM can support a large number of channels on a single fiber, up to 256 or more. This is achieved by using different wavelengths of light to transmit different signals, which are then combined and transmitted over the same fiber.
D. It supports both the SDH and SONET standards DWDM supports both the SDH (Synchronous Digital Hierarchy) and SONET (Synchronous Optical Network) standards, which are used for high-speed data transmission over optical networks.
E. Each channel can carry up to a 1-Gbps signal DWDM can support high-speed data transmission, and each channel can carry a signal with a bandwidth of up to 1 Gbps or more, depending on the specific implementation.
F. It supports simplex communications over multiple strands of fiber DWDM is a multiplexing technology that allows multiple signals to be transmitted over a single fiber. It does not support simplex communications over multiple strands of fiber, as each fiber is typically used for bidirectional transmission using multiple wavelengths.