computer networks. by the end of this class, you should be able to: understand the models of...

Computer Networks

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Computer Networks

By the end of this class, you should be able to:

Understand the models of computer networks identify some network hardware devices and

cables and describe their roles on the computer network

Differentiate between the different network topologies

Understand what a bandwidth is.

Page 3: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Computer network Operating systems

Peer to peer Client Server

Page 4: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Computer Networks (Area)

LAN

WAN

Page 5: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Page 6: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Ethernet: is a LAN

Page 7: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Page 8: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

LAN Cabling

Coaxial cablesCAT 5, CAT 6Fiber Optics

Page 9: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Coaxial cables

Page 10: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

CAT 5, CAT 6

Page 11: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Fiber Optics

Page 12: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Page 13: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

FIBER OPTIC CABLE ADVANTAGES OVER COPPER:

• SPEED: Fiber optic networks operate at high speeds - up into the gigabits• BANDWIDTH: large carrying capacity• DISTANCE: Signals can be transmitted further without needing to be "refreshed" or strengthened.• RESISTANCE: Greater resistance to electromagnetic noise such as radios, motors or other nearby cables.• MAINTENANCE: Fiber optic cables costs much less to maintain.

Page 14: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Some network Devices

Modem: Modulation/ demodulation Bridge: to connect LANsHub/Switch: to connect computersGateway: to connect LAN to WANRouter: to forward packets of information

over the network, intelligent routers will pick the routes with less traffic so that packets will arrive faster.

Page 15: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

What does a MODEM do?

Page 16: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Page 17: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Switch Ethernet Switch

Page 18: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Page 19: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

LAN can be connected to another LAN through a “BRIDGE”

Page 20: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Page 21: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

LAN can be connected to WAN through a “Gateway”

Page 22: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Network Topologies

Page 23: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Other types of computer networks

IntranetExtranetVPNActivity: Find out the difference between

Intranet and Extranet

Page 24: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

What is a bandwidth?

It’s the overall capacity of the connection. The greater the capacity, the more likely that better performance will result. Bandwidth is the amount of data that passes through a network connection over time as measured in bps. (bits per second).

Activity: Find out how to improve the performance of a computer network.

Page 25: Computer Networks. By the end of this class, you should be able to: Understand the models of computer networks identify some network hardware devices

Sources

http://compnetworking.about.com/od/basicnetworkingconcepts/l/blbasics_networ.htm

www.gizmodo.com.au http://www.tech-faq.com/storage-area-network.shtml http://www.supretech.com/Supretech_sample_Wan_Diagram.jpg http://images.google.com/imgres?imgurl=http://

static.howstuffworks.com/gif/ethernet3.gif&imgrefurl=http://computer.howstuffworks.com/ethernet.htm/printable&usg=__srQvmjtUS4KbXazvIjOh4WgWeGA=&h=342&w=396&sz=18&hl=en&start=1&tbnid=sdtdjBS3CDvx2M:&tbnh=107&tbnw=124&prev=/images%3Fq%3Dethernet%26gbv%3D2%26hl%3Den

http://images.google.com/imgres?imgurl=http://www.gyre.co.uk/images/broadband_router_1.png&imgrefurl=http://www.gyre.co.uk/help/broadband/connection_sharing.php&usg=__-MVAm3-HlR1uL5pa_RfvsOuIVE0=&h=430&w=448&sz=24&hl=en&start=15&tbnid=ScXI0bVwkISl4M:&tbnh=122&tbnw=127&prev=/images%3Fq%3Drouter%26gbv%3D2%26hl%3Den

http://www.arcelect.com/fibercable.htm

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