Introduction to computer networks

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Presentation transcript:

Introduction to computer networks 2018-2019 Term1 Introduction to computer networks

Class Activity: Collect your candy..

Define the term network media Describe different types of medium Lesson2 Objectives: Define the term network media Describe different types of medium Describe how data is transmitted over the network Explain the bandwidth Explain duplex

The material used to connect data is called medium Network Media Fiber-optic Copper wires Wireless The material used to connect data is called medium

A pair of copper cables twisted to protect the signal A type of network media that transfers electrical signals via copper medium Twisted Pair cable Coaxial cable A pair of copper cables twisted to protect the signal A copper or aluminum cable coved with a jacket that carries electrical signals.

Fiber Optic Cables A type of network media (cables) uses glass to carry the light signal. that transfers electrical signals via copper medium The fiber optic cable can carry the most data because it is not affected by outside signal or electromagnetic fields

Wireless Medium A type of network media uses radio signals to connect devices. Wifi and 4G networks uses the wireless network medium

Activity 7 & 8– Pages 39 -40 Work in pairs

Bandwidth Data transfers as small units through network medium as Packets. Each packet contains data in the image of 0s and 1s Number of bits that can go through the network medium is called bandwidth.

Bandwidth is measured in:

Checking Bandwidth Visit www.speedtest.net website and record the bandwidth

Transmitter & Receiver at the same time (duplex) Transmitting and Receiving Data Transmitter Receivers Transmitter & Receiver at the same time (duplex)

Duplex Half Duplex Full Duplex Receiving and transmitting signals by both ends at the same time Half Duplex Full Duplex One computer transmits data at any time Both computers sends and transmits data at the same time

Book Activity – P52-59

Cisco Packet Tracer Check the bandwidth of your network Cisco Packet Tracer. Book Activities P46-49

Cisco Packet Tracer Check the bandwidth and duplex of your network Cisco Packet Tracer. Book Activities p-54