Institution: AGRANI BANK LTD Exam: Agrani bank Ltd - Senior Officer - 12.08.2011
Topic: ICT (তথ্য ও যোগাযোগ প্রযুক্তি), Subject: Computer and ICT (তথ্য ও যোগাযোগ প্রযুক্তি)

Best Answer Explained in Below-:

The question regards the topology of a network, specifically how computers are interconnected. However, the correct answer should actually be "C) bus" rather than "B) ring."

In a **bus topology**, all devices in a network are connected to a single central cable, or "bus," which transmits data between them. Each end of the cable is terminated to prevent signal reflection, ensuring efficient data transmission. This topology is straightforward and cost-effective for small networks. However, cable failure can disrupt communication for all devices connected to the bus.

On the other hand, a **ring topology** connects devices in a circular manner, where each computer is connected to two others, forming a closed loop. Data travels in one direction—either clockwise or counterclockwise—around the ring. If one device or connection fails, it can disrupt the entire network unless redundancy measures are in place.

Thus, the correct answer to the question is "C) bus" for networks using a single cable with endpoints. The misalignment with the original answer choice "B) ring" highlights the importance of understanding specific network architectures and their characteristics.