Networking and Telecommunication Part 2

Networking and Telecommunication: Part 2

By: Dr Mohd Adan Omar

Multiple Choice

The latest trend in hardware is called BYOD stand for_______

• Bring your own digital

• Bring your own device

• Bring your own desktop

• Bring your own desk

Multiple Choice

Function of Modem is _____________

• to converts analog signal into the analog signal and digital signal to digital signal

• to converts analog signal into the digital signal

• to convert digital signal to analog signal

• to converts analog signal into the digital signal and digital signal to analog signal

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Wireless Computer Networks

• Bluetooth (802.15)

– Useful for creating personal area networking (P A N s)
– Has low power requirement
– Links up to 8 devices within 10-meter area using low-

power, radio-based communication and can transmit
up to 722 Kbps in 2.4Ghz band.

– Has been use in large corporations such as FedEx

drivers which use Bluetooth to transmit the delivery
data captured by their handheld computers to cellular
transmitters.

– Example of device use Bluetooth technology : (Figure

2.7) keyboard, mouse, printer, pagers, computers

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Figure 2.7 A Bluetooth Network

Bluetooth enables a
variety of devices interact
wirelessly with each other
within a small area.

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Continue

• Wi-Fi (802.11)

– Set of standards: 802.11
– Used for wireless LAN and wireless Internet access
– In most WiFi communication, wireless devices connecting to

a wired LAN using access points (Figure 2.8)

– An access point is a box consisting of a radio

receiver/transmitter and antennas that link to a wired
network, router or hub.

Standard

Speed

Effective indoor
range

Effective outdoor
range

802.11

2 Mbps

20 meters

100 meters

802.11b

11 Mbps

35 meters

120 meters

802.11g

Up to 54 Mbps

38 meters

140 meters

802.11n

Up to 300 Mbps

70 meters

250 meters

https://www.lifewire.com/wireless-standards-802-11a-802-11b-g-n-and-802-11ac-816553

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Figure 2.8 An 802.11 Wireless L A N

801.11 wireless LAN
that connects a small
number of mobile
devices to a larger
wired LAN and to the
Internet

Multiple Choice

Bluetooth is an example of __________

• Local area network

• Personal area network

• Wide area network

• Metropolitan area network

Multiple Choice

Wifi is connected to________

• Local area network

• Personal area network

• Wide area network

• Metropolitan area network

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continue

– Hotspots: one or more access points in public place to

provide maximum wireless coverage for a specific area

– Weak security features
– Free or Pay

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WiMax

• IEEE standard 802.16

• Access range up to 31 miles

• Require W i M a x antennas

• Transmission speed : 30-40 Mbps (up to 1 Gbps)

• Design for rural group that don’t have cable or DSL service

to find wireless access.

DSL = Digital Subscriber Line

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Radio Frequency Identification (R F I
D)

• Use tiny tags with microchips containing data about an item

and location

• Enable to transmit radio signals over a short distances to

R F I D readers (Figure 2.9)

• RFID readers then pass the data over a network to a

computer for processing.

• Common uses:

– Automated toll-collection
– Tracking goods in a supply chain

• Use low power transmitter to read data store in a tag.

• Reduction in cost of tags making R F I D viable for many

firms

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Figure 2.9 How R F I D Works

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Wireless Sensor Networks (W S N s)

• Networks of hundreds or thousands of interconnected

wireless devices (Figure 2.10)

• Used to monitor building security, detect hazardous

substances in air, monitor environmental changes, traffic,
or military activity

• Devices have built-in processing, storage, and radio

frequency sensors and antennas

• Require low-power, long-lasting batteries and ability to

endure in the field without maintenance

• Major sources of “Big Data” and fueling “Internet of Things”

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Figure 2.10 A Wireless Sensor
Network

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Continue

• Potential applications of sensor networks include:

– Industrial automation
– Automated and smart homes
– Video surveillance
– Traffic monitoring
– Medical device monitoring
– Monitoring of weather conditions
– Air traffic control
– Robot control.

https://searchdatacenter.techtarget.com/definition/sensor-network

Multiple Choice

Which of the following application below is a possible application on sensor network?

• Air Traffic Control

• Robot Control

• Smart Homes

• All of them

Thank you