A star topology is a network design where all devices are connected to a central hub, which acts as a central point of control and management for the network. This type of topology is commonly used in access networks, where a central node is used to aggregate traffic from multiple users or devices, and then forward it to the core network. This design allows for efficient use of resources and easy management of the network.
References:
"Computer Networking: A Top-Down Approach" by James Kurose and Keith Ross (Chapter 3)
"Data Communications and Networking" by Behrouz A. Forouzan (Chapter 2)
Questions 5
WDM allows transmission systems to:
Options:
A.
Transport multiple signals transparently, onto several wavelengths, all together over one single fiber
B.
Increase the bit rate of each client signal by spreading it over multiple wavelengths
C.
Share a single signal among multiple fibers doing load balancing, and thus increasing the reliability of the optical transmission
D.
Allocate different signals to different time slots
WDM (Wavelength Division Multiplexing) allows transmission systems to transport multiple signals transparently, onto several wavelengths, all together over one single fiber. This allows for increased capacity, as many different signals can be transmitted at the same time and along the same fiber. Other advantages include improved signal integrity and reduced signal attenuation.
