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In which network topology is every node connected to a single central device?

  1. A.Bus topology
  2. B.Ring topology
  3. C.Star topology
  4. D.Mesh topology

Correct answer

C. Star topology

Explanation

The correct answer is C, Star topology. In a star network every computer has its own cable running to a central hub or switch, so the shape resembles the spokes of a wheel. Adding or removing one machine disturbs nobody else and a broken cable affects only that one node, which is why almost every office and laboratory LAN is wired this way; the weakness is that failure of the central device stops the whole network. Option A is wrong because a bus topology has all nodes tapping one common backbone cable with terminators at its two ends. Option B is wrong because in a ring the machines form a closed loop, each joined to two neighbours, and data circulates in one direction using a token. Option D is wrong because a mesh links every node directly to every other node, needing n(n-1)/2 cables for n nodes and having no central device at all.

Read the full article: Computer Networks: Topologies, Devices and OSI Layers

Practice Questions

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Q1.Computer AwarenessAsked in: Uttar Pradesh · 22 Dec, 2018, Shift 1Medium

In terms of computers, the set of ways in which an adversary can enter a system and can potentially cause damage is called:

  1. A.Attack Surface
  2. B.Attack Signature
  3. C.Attack Pattern
  4. D.Attack Path
Show answer
Correct answer: A. Attack Surface

The attack surface of a system is the total collection of every point at which an unauthorised person could try to enter it or pull data out of it: open ports, running services, user accounts, login pages, removable drives and even the employees who can be tricked.

Q3.Computer AwarenessAsked in: Delhi · 1 Aug 2021, Shift 3Easy

What is the full form of GPRS in mobile computing?

  1. A.General Packet Radio Service
  2. B.General Packet Route service
  3. C.General Package Radio Service
  4. D.General Packet Radiation Service
Show answer
Correct answer: A. General Packet Radio Service

GPRS was added to the 2G cellular system so that the same radio channel could carry data in packets instead of holding a circuit open the way a voice call does.