Computer networks overview – UGC NET Question

Statements A, B, D and E correctly describe LANs, WANs, routers and client–server architecture. LANs cover small areas, WANs link widely separated locations, routers forward packets between networks and client–server models distinguish service providers from requesters. Statement C is false because bandwidth refers to data transfer capacity, not cable length, and F is false because peer-to-peer networks allow multiple nodes to initiate communication without a single central controller. Hence A, B, D and E only are true.

Option A:
Option A is incorrect because it omits E and therefore does not mention how client–server architecture distinguishes roles in a network. While A, B and D are true, the combination does not capture all correct statements.

Option B:
Option B is incorrect because it omits B and includes only A, D and E. Without B, the nature of WANs is not represented, so the set is incomplete even though the included statements are correct.

Option C:
Option C is correct because it includes all and only the accurate statements about network scope, devices and architectures. It excludes misconceptions about bandwidth and peer-to-peer communication, so it matches the intended correct set.

Option D:
Option D is incorrect because it includes F, which wrongly suggests a central node in peer-to-peer networks. This contradicts the basic idea of distributed peers, so the presence of F invalidates the combination.