Physical Layer Transmission Media - Slides

Physical Layer Transmission Media - Slides - CSCI 232 CSCI...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
SCI 232 CSCI 232 Computer Networking: Physical Layer Transmission Media eorge Blankenship George Blankenship Physical Layer Transmission Media George Blankenship 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Lecture Outline • Guided –w ire nguided • Unguided – wireless Physical Layer Transmission Media George Blankenship 2
Background image of page 2
Design Factors • Key concerns are data rate and distance igher bandwidth gives higher data rate – Higher bandwidth gives higher data rate – Transmission impairments increase with distance (decrease data rate) • Number of receivers – More receivers (multi-point) introduce more attenuation •C haracteristics and quality – Determined by medium and signal or guided the medium is more important – For guided, the medium is more important – For unguided, the bandwidth produced by the antenna is more important Physical Layer Transmission Media George Blankenship 3
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Electromagnetic Spectrum Physical Layer Transmission Media George Blankenship 4
Background image of page 4
Guided Transmission Media •T w i s t e d P a i r • Coaxial cable ptical fiber • Optical fiber Physical Layer Transmission Media George Blankenship 5
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Twisted Pair Physical Layer Transmission Media George Blankenship 6
Background image of page 6
Twisted Pair - Applications • Most common medium • Telephone network – Between house and local exchange (subscriber loop) ithin buildings Within buildings – To private branch exchange (PBX) or local area networks (LAN) • For local area networks (LAN) – 10 Mbps or 100 Mbps Physical Layer Transmission Media George Blankenship 7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Twisted Pair - Pros and Cons • Cheap • Easy to work with ow data rate • Low data rate • Short range Physical Layer Transmission Media George Blankenship 8
Background image of page 8
wisted Pair ransmission Twisted Pair - Transmission haracteristics Characteristics • Analog – Amplifiers every 5km to 6km • Digital – Use either analog or digital signals – repeater every 2km or 3km i it d di t • Limited distance • Limited bandwidth (1 MHz) • Limited data rate (100 MHz) • Susceptible to interference and noise Physical Layer Transmission Media George Blankenship 9
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Near End Crosstalk • Coupling of signal from one pair to another • Coupling takes place when transmit signal tering the link couples back to receiving entering the link couples back to receiving pair • Near transmitted signal is picked up by near receiving pair Physical Layer Transmission Media George Blankenship 10
Background image of page 10
Unshielded and Shielded TP • Unshielded Twisted Pair (UTP) – Ordinary telephone wire – Cheapest – Easiest to install – Suffers from external EM interference • Shielded Twisted Pair (STP)
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/03/2010 for the course CS 232 taught by Professor Susan during the Summer '09 term at GWU.

Page1 / 38

Physical Layer Transmission Media - Slides - CSCI 232 CSCI...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online