Cisco Certified Network Associate CCNA1 – Module 4 – Noise Cisco Networking Academy Turku Polytechnic
CCNA1 – Module 4 • Every time when data is transmitted with electricity, there is noise involved. – – – – –
Attenuation Impedance discontinuity Insertion loss Crosstalk (near, far and power sum) Propagation delay
CCNA1 – Module 4 • Optical fiber have different kind of interferences than copper media – Attenuation occurs but less than in copper media – Optical discontinuity. Small amount of light signal is reflected back.