UGC NET Questions (Paper – 1)

Bandwidth represents the data-carrying capacity of a link, typically measured in bits per second or its multiples. Higher bandwidth allows more data to be sent in a given time.

Option A:
Cable width is a physical dimension; while it can influence possible bandwidth, it is not what the term “bandwidth” itself means in ICT.

Option B:
This option correctly defines bandwidth as the upper limit on data transfer rate through a channel.

Option C:
Number of users may affect congestion but is not itself bandwidth.

Option D:
Uptime or on-time is unrelated to the technical concept of channel capacity.

Mbps stands for megabits per second, a common unit used to specify bandwidth. The prefix mega indicates a factor of one million, so this unit measures millions of bits transmitted each second. Understanding this helps users compare the speeds of different internet connections. Hence, in this context, M denotes mega.

Option A:
Option A is correct because standard SI prefixes used in ICT interpret M as mega, representing 10 to the power of 6, which is applied to bits per second in bandwidth ratings.

Option B:
Option B, micro, would be represented by the Greek letter mu rather than M and denotes a millionth, which is the opposite of the intended scale.

Option C:
Option C, milli, corresponds to a thousandth and uses the symbol m, not M.

Option D:
Option D, multi, is a descriptive English word and not a formal metric prefix.

Bandwidth describes the capacity of a communication medium to carry data per unit time, often measured in bits per second. Higher bandwidth allows more information to pass through the channel simultaneously, supporting faster downloads and better quality multimedia streams. It is a key parameter when designing or selecting network connections. Thus, the quantity described in the question is bandwidth.

Option A:
Option A, latency, indicates the delay experienced in transmission and is about time rather than capacity, so it does not reflect maximum data rate.

Option B:
Option B, throughput, measures the actual data transfer achieved in practice, which can be lower than the maximum possible rate due to various overheads and losses, and is therefore conceptually distinct.

Option C:
Option C is correct because in ICT terminology bandwidth consistently denotes the theoretical or allocated maximum data carrying capacity of a link or channel.

Option D:
Option D, jitter, refers to variation in delay over time and affects quality of real time applications but does not specify a maximum rate.