Topic 4 & 5 Networking Media

Topic 4 & 5 Networking Media

by Dr. Harryizman Harun

SMMTC, UUM​

​The twisting is necessary to minimize electromagnetic radiation and resist external interference. It also helps to limit interference with other adjacent twisted pairs (cross-talk).

Protects all the conductors within the cable

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​Dr. Harryizman Harun SMMTC, UUM

​Outer Jacket

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• Reduce electrical noise from affecting the signals.

• Reduce electromagnetic radiation that may interfere with other devices.

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​Dr. Harryizman Harun SMMTC, UUM

​Braided/Foiled Shield

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The conductor is the point at which data transmits.

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​Dr. Harryizman Harun SMMTC, UUM

​Copper Conductor

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To maintain the spacing between the center conductor and shield.

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​Dr. Harryizman Harun SMMTC, UUM

​Insulator

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• To shield from electromagnetic interference.

• Provides a barrier against EMI moving into and out of the coaxial cable.​

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​Dr. Harryizman Harun SMMTC, UUM

​Braided Mesh

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To protect internal layers from damages.

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​Dr. Harryizman Harun SMMTC, UUM

​Protective Plastic Layer

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​Travels in only one direction. It can be more clear on the example of person talking into microphone and then hearing voice from the speaker. Signal travels in only one direction from microphone to speaker.

​Capable of sending signal in both directions, but in only one direction at a time. An example could be police car radio phones allowing one person talk at a time.

​Allows signal transmission in both directions simultaneously. An example is a telephone IP service.

A thin glass tube called a core that transports light pulses.

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​Dr. Harryizman Harun SMMTC, UUM

​Core

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A thin layer of glass that protects and surrounds the fiber core, reflecting light back into the core causing light waves to travel the length of the fiber.

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​Dr. Harryizman Harun SMMTC, UUM

​Cladding

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Absorb shocks, prevent excessive bending and reinforce the fiber core.

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​Dr. Harryizman Harun SMMTC, UUM

​Coating

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Protect the fiber core from excessive pull forces and crushing, particularly during installation.

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​Dr. Harryizman Harun SMMTC, UUM

​Strength Member

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A final layer of protection for the core conductor and further strengthens the cable.

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​Dr. Harryizman Harun SMMTC, UUM

​Outer Jacket

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​Fresnel Zone: Regions of space between and around a transmitter and a receiver

​IR

Review Questions​

Topic 4 & 5​

Multiple Choice

In data communication terminology, a transmission medium is a ________ path between the transmitter and the receiver.

• logical

• physical

• astronomical

Multiple Choice

Transmission Media is broadly classified into guided and unguided media.

• True

• False

Multiple Choice

Guided media is also referred to as Wired or ________ transmission media.

• bounded

• unbounded

• bordered

• unbordered

Multiple Select

Which of the following are the correct features of guided media?

• High Speed

• Insecure

• Used for comparatively shorter distances

Multiple Choice

Twisted Pair cable is of two types: Unshielded Twisted Pair (UTP) and Structured Twisted Pair (STP).

• False

• True

Multiple Choice

Ethernet is the traditional technology for connecting devices in a wireless local area network (LAN) or wide area network (WAN).

• True

• False

Multiple Choice

In an optical fibre, the core is surrounded by a less dense glass or plastic covering called ________.

• cloying

• coating

• cladding

• clumping

Multiple Choice

The coaxial cable transmits information with cable bandwidth split into separate ranges in baseband mode.

• True

• False

Multiple Choice

Which guided medium is shown in the photo?

• Radiowave

• Twisted Pair

• Coaxial

• Fibre Optic

Multiple Choice

The following unguided media can penetrate through buildings and the sending and receiving antennas need not be aligned.

• Radiowaves

• Microwaves

• Infrared

Multiple Choice

_______ waves are used for very short-distance communication. For example, it is used in TV remotes, wireless mouse, keyboards, printers, etc.

• Infrared

• Radiawaves

• Microwaves

End of Review Questions​

Thank you