UGC NET Questions (Paper – 1)

Statements A, B, D and E correctly describe how bandwidth and QoS relate to e-learning services, while C and F are false. Bandwidth is a data rate, QoS can prioritise real-time traffic and low bandwidth leads to buffering. Monitoring usage allows institutions to make informed upgrade decisions. Networks rarely treat all traffic equally under congestion, and oversupply of bandwidth does not remove the need for management, so C and F must be excluded.

Option A:
Option A is correct because it integrates definitions, technical mechanisms, service quality effects and planning practices into one coherent set. It recognises that both capacity and management matter for reliable e-learning.

Option B:
Option B is incorrect because it omits E, and therefore does not mention monitoring and planning. While A, B and D are true, they do not cover the long-term capacity management aspect.

Option C:
Option C is incorrect because it excludes A, which provides the foundational concept of bandwidth. B, D and E are true, but without A, the explanation of what is being managed in QoS and capacity planning is incomplete.

Option D:
Option D is incorrect because it omits B, thereby ignoring QoS mechanisms as a way to protect time-sensitive traffic. A, D and E are correct, yet the absence of B weakens understanding of how networks can handle mixed applications.

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.