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ICT Unit 2 - Study Area 1 : Network & Web Basics

Network Devices
by

Esther Seow

on 26 August 2013

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Transcript of ICT Unit 2 - Study Area 1 : Network & Web Basics

MUFY ICT 2
Network Devices
Network devices
Network cards
(network interface cards)
Connects a computer to a network (eg- a LAN)
an adapter card (sometimes already integrated onto the mainboard
has a unique address (among all the network cards in the world), called a
MAC address

uses cables with
RJ-45 connectors
short for
mo
dulator-
dem
odulator
enables a computer to transmit data over telephone or cable lines
computer information is stored
digital
ly, whereas information transmitted over telephone lines is transmitted in the form of
analog
waves
a modem converts between these two forms
(digital & analog)
network cards
modems
hubs
switches
routers
bridges
repeaters
Hubs
used to network multiple computers together
contains multiple ports
allows communication to flow between multiple segments of a LAN
Switches
used to network multiple computers together
has ports to connect to computers, cable or DSL modems, and other switches
switches are more advanced than hubs and less capable than routers
can limit the traffic to and from each port so that each device connected to the switch has a sufficient amount of bandwidth
however, switches don't provide the firewall and logging capabilities that routers do
Esther Seow
esthers@sunway.edu.my
January 2013
MODEM
Network Devices
Router
connects 2 networks together
eg- LAN to LAN, LAN to WAN (Internet)
keeps log files about the local network activity
routers determine the best path for forwarding packets
routers use protocols to communicate with each other and configure the best route between any two hosts
Router
Bridge
connects a LAN to another LAN that uses the same protocol
filters data traffic at a network boundary
Repeater
regenerate or replicate data signal
used in transmission systems to regenerate analog or digital signals distorted by transmission loss
data transmissions can only span a limited distance before the quality of the signal degrades
network cards
modems
hubs
switches
routers
bridges
repeaters
Full transcript