UGC NET Questions (Paper – 1)

Statements A, B and C correctly distinguish LAN, WAN and MAN by their geographical coverage. LANs serve limited areas like buildings, WANs can span entire countries or continents, and MANs typically cover metropolitan regions. Statement D is false because LANs can be implemented using wired, wireless or mixed technologies. Thus, the combination that includes A, B and C but excludes D is the correct answer.

Option A:
Option A is incorrect because it mentions only A and B as correct and omits C. While A and B are true, statement C is also correct in associating MAN with city-wide networks. Leaving out a true statement means this option does not present the full set of correct statements.

Option B:
Option B is correct because it brings together A, B and C, all of which are accurate descriptions of common network types. It rightly excludes D, which wrongly claims that LANs must always be wireless. Therefore this option aligns with standard ICT classifications of networks by scope.

Option C:
Option C is incorrect because it includes D alongside B and C. Although B and C are true, D is false because LANs may be wired, wireless or a combination. Including a false statement invalidates the combination.

Option D:
Option D is incorrect because it assumes all four statements are correct. Statement D misrepresents the nature of LAN technologies and should not be included among correct statements. A valid answer must exclude that incorrect statement.

Statements A, B and C correctly describe star, bus and ring topologies, whereas D gives an incorrect property of mesh topology. Mesh networks are characterised by multiple possible paths between nodes, which supports redundancy and fault tolerance. Saying that there is only one path contradicts the very idea of a mesh. Therefore, the combination containing A, B and C but not D is the only fully correct option.

Option A:
Option A is correct because it brings together the accurate descriptions of three fundamental topologies without including the misleading statement about mesh networks. It shows that star uses a central device, bus uses a shared backbone and ring uses a closed loop. By omitting D, it avoids confusion about the nature of mesh connectivity.

Option B:
Option B is incomplete because it includes only A and B and leaves out C. While star and bus are important, ring topology is also a standard design and must be acknowledged to answer the question fully. Excluding C means not all correct statements are chosen.

Option C:
Option C is incomplete because it groups B and C but omits A. Star topology is widely deployed in modern LANs, so leaving it out fails to recognise one of the most common practical configurations.

Option D:
Option D is incorrect because it accepts all four statements, thereby treating D as correct. Since mesh topology typically offers multiple routes between nodes, D is false, and its inclusion invalidates this combination.

A Local Area Network is designed to cover a limited geographical area such as a room, building or small campus. It provides high-speed connectivity among computers and devices within that confined space. LANs are common in schools, colleges, offices and laboratories for resource sharing. Therefore, this option accurately identifies the network type with a small physical scope.

Option A:
A Metropolitan Area Network covers a city or a large campus spread over tens of kilometres. It is much larger in scope than a single building. Because of this wider coverage, MAN does not best represent the small-area network described in the question.

Option B:
A Wide Area Network spans very large geographical areas, sometimes across countries or continents. The Internet itself is an example of a WAN. Since the question emphasises a single building or small campus, WAN is far beyond the required scope.

Option C:
A Virtual Private Network is a secure tunnel created over existing networks such as the Internet. It describes a method of secure communication rather than the physical size of the network. Hence, it does not directly answer the question about geographical coverage.

Option D: