Deck 4: Exploring Different Aspects of Wireless Sensor Networks

Question 1

Wireless sensor nodes are equipped with
i. Sensing unit
ii. Processing unit,
iii. Communication unit
iv. Power unit

A)i, ii, iv
B)i, iii, iv
C)i, ii, iii, iv
D)i, ii, iii

Answer 1

i, ii, iii, iv

Question 2

A Relay node has

A)process sensor or control equipment
B)control equipment
C)communiucation equipment
D)process sensor

Answer 2

communiucation equipment

Question 3

the most owerfull node is

A)sensor node
B)relay node
C)cluster head
D)gateway

Answer 3

gateway

Question 4

choose the correct statement

A)there may be more than one cluster in wsn.
B)there must be more than one cluster in wsn.
C)there is only one cluster in wsn.
D)none of above

Question 5

In sensor networks, the nodes are of different capabilities in terms of computation, communication, memory, energy level and reliability. it is called as

A)centralized
B)heterogeneous
C)distributed
D)homogeneous

Question 6

In sensor networks, the nodes are of different capabilities in terms of computation, communication, memory, energy level and reliability. it is called as

A)hierarchical
B)centralized
C)distributed
D)homogeneous

Question 7

A topology is a communication topology, where each node connects directly to a gateway. A single gateway can send or receive a message to a number of remote nodes.

A)star
B)tree
C)mesh
D)none of above

Question 8

Tree topology is also called as

A)unique star topology
B)cascaded star topology
C)unique mesh topology
D)cascaded mesh topology

Question 9

The Mesh topologies

A)unique path between pair of nodes
B)multiple path between pair of nodes
C)can not isolate and detect faults
D)none of above

Question 10

The underground wireless sensor networks are ___________ than the terrestrial WSNs

A)more expensive
B)less expensive
C)equal expensive
D)a or b

Question 11

A Under Water WSNs has challenge of

A)a long propagation delay,
B)a limited battery that cannot be recharged or replaced.
C)a and b both
D)uses traditional communication inside water

Question 12

Multimedia wireless sensor networks has requirements of

A)low bandwidth
B)high bandwidth
C)high energy consumption and high bandwidth
D)low energy consumption and low bandwidth

Question 13

The advantages of MWSN over the static wireless sensor networks include

A)better and improved coverage
B)better energy efficiency
C)superior channel capacity
D)all of above

Question 14

For bandwidth allocation,

A)available bandwidth means that the user can have a peak of bandwidth.
B)available bandwidth means that the user can have average of bandwidth.
C)available bandwidth means that the user can have a guaranteed of bandwidth.
D)none of the above

Question 15

Delay is the time datagrams take from the source to destination and depends on

A)fixed delays - application delay, transmission over physical medium
B)variable delays -queuing delays, contention with other traffic at each network node.
C)transmission dealy
D)both fixed and variable delay

Question 16

Packet loss is, the number of packets lost in the network, via

A)errors in the physical medium
B)packet drop policies due to congestion
C)a and b both
D)non availability of connection

Question 17

To calculate throughput, the total time was calculated as the difference between

A)the time between the first packet and last packet reached the destination
B)the time the first packet started and the time the last packet reached the destination
C)the time the first packet started and the time the last packet started
D)the time the first packet reached and the time the last packet started

Question 18

Jitter is commonly used as an indicator of

A)consistency and stability of a network.
B)consistency of a network.
C)stability of a network.
D)throughput of anetwork.

Question 19

A layered architecture of WSN has a

A)base station in each layer
B)only single hop communication
C)multiple base stations
D)single powerful base station

Question 20

The physical layer is responsible for

A)frequency selection,
B)modulation and data encryption.
C)both
D)modulation only

Question 21

The data link layer functions as a

A)pathway for multiplexing of data streams, data frame detection,
B)medium access control (mac) and error control.
C)data frame detection, medium access control
D)both a and b

Question 22

Very limited resources for WSN refers

A)limited memory, and limited computation
B)limited power, and limited computation
C)limited memory, limited power,
D)limited memory, limited computation and limited power

Question 23

Wireless networks are classified as:

A)infrastructure-based networks
B)ad-hoc network
C)infrastructure-based networks and infrastructure-less (ad-hoc) networks.
D)structured network

Question 24

Infrastructure-based networks example is

A)wlan
B)manet
C)wlan and manet both
D)none of the above

Question 25

Infrastructure-less or Ad Hoc network, example is

A)wlan
B)manet
C)wlan and manet both
D)none of the above