Question 1

__________in S-MAC is similar to the using an RTS/CTS exchange

Accepted Answer

A) collision avoidance 
B) overhearing avoidance 
C) both 
D) one of above 
A) collision avoidance 
B) overhearing avoidance 
C) both 
D) one of above A

Question 2

The Access time is

Accepted Answer

A) this is the time taken by the sender to construct the message 
B) this is the delay incurred while waiting for access to the transmission channel due to contention, collisions etc 
C) this is the time for message to travel across the channel to the destination node 
D) this is the time for the network interface on the receiver side to get the message and notify the host of its arrival 
A) this is the time taken by the sender to construct the message 
B) this is the delay incurred while waiting for access to the transmission channel due to contention, collisions etc 
C) this is the time for message to travel across the channel to the destination node 
D) this is the time for the network interface on the receiver side to get the message and notify the host of its arrival B

Question 3

The Send time is

Accepted Answer

A) this is the time taken by the sender to construct the message 
B) this is the delay incurred while waiting for access to the transmission channel due to contention, collisions etc 
C) this is the time for message to travel across the channel to the destination node 
D) this is the time for the network interface on the receiver side to get the message and notify the host of its arrival 
A) this is the time taken by the sender to construct the message 
B) this is the delay incurred while waiting for access to the transmission channel due to contention, collisions etc 
C) this is the time for message to travel across the channel to the destination node 
D) this is the time for the network interface on the receiver side to get the message and notify the host of its arrival A

Question 4

in case of hidden terminal problem

Accepted Answer

A) two senders are in the communication range of each other 
B) two senders are not in the communication range of each other 
C) independent of sender range 
D) none of the above 
A) two senders are in the communication range of each other 
B) two senders are not in the communication range of each other 
C) independent of sender range 
D) none of the above

Question 5

Incorrect statement about Time and frequency multiplexing in combination is

Accepted Answer

A) better protection against tapping 
B) protection against frequency selective interference 
C) higher data rates compared to code multiplex 
D) no precise coordination required 
A) better protection against tapping 
B) protection against frequency selective interference 
C) higher data rates compared to code multiplex 
D) no precise coordination required

Question 6

in case of exposed terminal problem

Accepted Answer

A) two senders are in the communication range of each other 
B) two senders are not in the communication range of each other 
C) independent of sender range 
D) two receivers are in the communication range of each other 
A) two senders are in the communication range of each other 
B) two senders are not in the communication range of each other 
C) independent of sender range 
D) two receivers are in the communication range of each other

Question 7

If the channel is busy, continues sensing the channel until it becomes idle again.

Accepted Answer

A) 1-persistent csma 
B) non-persistent csma 
C) p-persistent csma 
D) o-persistent csma 
A) 1-persistent csma 
B) non-persistent csma 
C) p-persistent csma 
D) o-persistent csma

Question 8

The latency in channel can be decomposed into following components

Accepted Answer

A) send time and access time 
B) receive time and propagation time 
C) a and b both 
D) neither a nor b 
A) send time and access time 
B) receive time and propagation time 
C) a and b both 
D) neither a nor b

Question 9

The latency in channel can be decomposed into following components

Accepted Answer

A) send time 
B) access time and receive time 
C) propagation time 
D) alln of above 
A) send time 
B) access time and receive time 
C) propagation time 
D) alln of above

Question 10

Following aspects of the energy cost in a sensor network make it challenging to reason about optimizing energy

Accepted Answer

A) multi-hop communication can be more efficient than direct transmission 
B) when a node transmits, all other nodes within range can hear 
C) neither a nor b 
D) a and b both 
A) multi-hop communication can be more efficient than direct transmission 
B) when a node transmits, all other nodes within range can hear 
C) neither a nor b 
D) a and b both

Question 11

Design Criteria for Medium Access Protocols

Accepted Answer

A) maximize the throughput by minimizing the delay and energy spent. 
B) maximize the throughput by maximize the delay and minimizing energy spent. 
C) minimize the throughput by minimizing the delay and energy spent. 
D) maximize the throughput by maximize the delay and energy spent. 
A) maximize the throughput by minimizing the delay and energy spent. 
B) maximize the throughput by maximize the delay and minimizing energy spent. 
C) minimize the throughput by minimizing the delay and energy spent. 
D) maximize the throughput by maximize the delay and energy spent.

Question 12

select the correct statement

Accepted Answer

A) since the nodes operate independently, their clocks may not be synchronized with one another 
B) for time synchronization, the wired protocols assume the existence of highly accurate master clocks on some network nodes such as skew clock 
C) a and b both 
D) neither a nor b 
A) since the nodes operate independently, their clocks may not be synchronized with one another 
B) for time synchronization, the wired protocols assume the existence of highly accurate master clocks on some network nodes such as skew clock 
C) a and b both 
D) neither a nor b

Question 13

Throughput is defined as the number of bits or bytes successfully

Accepted Answer

A) received per time unit t 
B) lost per time unit t 
C) transmitted per time unit t 
D) retransmitted per time unit t 
A) received per time unit t 
B) lost per time unit t 
C) transmitted per time unit t 
D) retransmitted per time unit t

Question 14

Microcontroller has current drawn typically of 1.8 mA and 5.1 µA respectively in

Accepted Answer

A) active mode and sleep mode 
B) sleep mode and active mode 
C) ideal mode and active mode 
D) sleep mode and ideal mode 
A) active mode and sleep mode 
B) sleep mode and active mode 
C) ideal mode and active mode 
D) sleep mode and ideal mode

Question 15

When a node has a packet to send, it listens for traffic on the channel.

Accepted Answer

A) if the channel is free, it initially sends message, cts. 
B) if the channel is free, it initially waits for message, cts. 
C) if the channel is free, it initially sends message, rts. 
D) if the channel is free, it initially waits for message, rts. 
A) if the channel is free, it initially sends message, cts. 
B) if the channel is free, it initially waits for message, cts. 
C) if the channel is free, it initially sends message, rts. 
D) if the channel is free, it initially waits for message, rts.

Question 16

This version is time scheduled. A central controller in the network assigns a fixed transmission order

Accepted Answer

A) 1-persistent csma 
B) non-persistent csma 
C) p-persistent csma 
D) o-persistent csma 
A) 1-persistent csma 
B) non-persistent csma 
C) p-persistent csma 
D) o-persistent csma

Question 17

If the channel is busy, it back-offs for a random amount of time and then retries.

Accepted Answer

A) 1-persistent csma 
B) non-persistent csma 
C) p-persistent csma 
D) o-persistent csma 
A) 1-persistent csma 
B) non-persistent csma 
C) p-persistent csma 
D) o-persistent csma

Question 18

The Receive time is

Accepted Answer

A) this is the time taken by the sender to construct the message 
B) this is the delay incurred while waiting for access to the transmission channel due to contention, collisions etc 
C) this is the time for message to travel across the channel to the destination node 
D) this is the time for the network interface on the receiver side to get the message and notify the host of its arrival 
A) this is the time taken by the sender to construct the message 
B) this is the delay incurred while waiting for access to the transmission channel due to contention, collisions etc 
C) this is the time for message to travel across the channel to the destination node 
D) this is the time for the network interface on the receiver side to get the message and notify the host of its arrival

Question 19

Design Criteria for Medium Access Protocols

Accepted Answer

A) maximize the throughput by maximize the delay and energy spent. 
B) to minimize the time in listening mode as much as possible. 
C) to maximize the time in listening mode as much as possible. 
D) avoid the switched off devices handling 
A) maximize the throughput by maximize the delay and energy spent. 
B) to minimize the time in listening mode as much as possible. 
C) to maximize the time in listening mode as much as possible. 
D) avoid the switched off devices handling

Question 20

In centralized TDMA,

Accepted Answer

A) the schedule is calculated online and provided when required 
B) the schedule is calculated offline and provided to the sensor nodes at startup. 
C) the schedule is calculated offline and provided when required 
D) the schedule is calculated online and provided when after regular interval of time 
A) the schedule is calculated online and provided when required 
B) the schedule is calculated offline and provided to the sensor nodes at startup. 
C) the schedule is calculated offline and provided when required 
D) the schedule is calculated online and provided when after regular interval of time

__________in S-MAC is similar to the using an RTS/CTS exchange

The Access time is

The Send time is

in case of hidden terminal problem

Incorrect statement about Time and frequency multiplexing in combination is

in case of exposed terminal problem

If the channel is busy, continues sensing the channel until it becomes idle again.

The latency in channel can be decomposed into following components

The latency in channel can be decomposed into following components

Following aspects of the energy cost in a sensor network make it challenging to reason about optimizing energy

Design Criteria for Medium Access Protocols

select the correct statement

Throughput is defined as the number of bits or bytes successfully

Microcontroller has current drawn typically of 1.8 mA and 5.1 µA respectively in

When a node has a packet to send, it listens for traffic on the channel.

This version is time scheduled. A central controller in the network assigns a fixed transmission order

If the channel is busy, it back-offs for a random amount of time and then retries.

The Receive time is

Design Criteria for Medium Access Protocols

In centralized TDMA,

Exploring the Challenges and Applications of Sensor Networks

Wireless Networking and Sensor Networks

Wireless Sensor Network Applications and Challenges

Exploring Different Aspects of Wireless Sensor Networks

Topics on Wireless Sensor Networks and Network Access Protocols

Multiple Access Techniques and Wireless Network Management

Wireless Networking and Radio Communication

Wireless Mac Protocols and Network Topology Control

Wireless Networking and Standards

Mac and PHY Standards and Zigbee Technology

Wireless Networking Technology and Protocols

Wireless Communication Technologies and Standards

Network Size, Tracking Capabilities, and Routing Protocols

Routing and Localization in Sensor Networks

Localization and Tracking Methods in Wireless Sensor Networks

Range-Free Localization Techniques and Node Network Terminology

Filters

Exam 8: Understanding Energy Optimization and Latency in Sensor Networks

__________in S-MAC is similar to the using an RTS/CTS exchange

The Access time is

The Send time is

in case of hidden terminal problem

Incorrect statement about Time and frequency multiplexing in combination is

in case of exposed terminal problem

If the channel is busy, continues sensing the channel until it becomes idle again.

The latency in channel can be decomposed into following components

The latency in channel can be decomposed into following components

Following aspects of the energy cost in a sensor network make it challenging to reason about optimizing energy

Design Criteria for Medium Access Protocols

select the correct statement

Throughput is defined as the number of bits or bytes successfully

Microcontroller has current drawn typically of 1.8 mA and 5.1 µA respectively in

When a node has a packet to send, it listens for traffic on the channel.

This version is time scheduled. A central controller in the network assigns a fixed transmission order

If the channel is busy, it back-offs for a random amount of time and then retries.

The Receive time is

Design Criteria for Medium Access Protocols

In centralized TDMA,

Exploring the Challenges and Applications of Sensor Networks

Wireless Networking and Sensor Networks

Wireless Sensor Network Applications and Challenges

Exploring Different Aspects of Wireless Sensor Networks

Topics on Wireless Sensor Networks and Network Access Protocols

Multiple Access Techniques and Wireless Network Management

Wireless Networking and Radio Communication

Wireless Mac Protocols and Network Topology Control

Wireless Networking and Standards

Mac and PHY Standards and Zigbee Technology

Wireless Networking Technology and Protocols

Wireless Communication Technologies and Standards

Network Size, Tracking Capabilities, and Routing Protocols

Routing and Localization in Sensor Networks

Localization and Tracking Methods in Wireless Sensor Networks

Range-Free Localization Techniques and Node Network Terminology

Filters