computer networks
TRANSCRIPT
Computer Networks
Computer NetworksA computer network is a system in which
computers are connected to share information and resources.
Computer NetworksHistory:
Sputnik 1st Artificial Satellite in Earth Orbit in 1957
ARPA in 1958 to create IPTO (Information Processing Technique Office)
ARPA Net in 1959
Computer NetworksUses of Computer Networks:
Facilitating CommunicationVia email, instant messaging, telephone
Sharing Hardware: Printer, Scanners.
Sharing Files, Data & Info :Any authorized user can access data from other computer
Sharing Software's: Users connected to a network can access application programs on a network.
Computer NetworksTypes of Computer Networks based on:
Medium used to transport the dataTopologyOrganization Structure
Computer NetworksMedium used to transport the data
Computer NetworksTopology
The layout of a network & how different nodes in a network are connected together.
Computer NetworksTypes of Topology:
Ring Topology
Star Topology
Mesh Topology
Bus Topology Mixed Topology
Computer NetworksTypes of Topology:
Ring Topology
Computer NetworksTypes of Topology:
Ring Topology
Star Topology
Computer NetworksTypes of Topology:
Ring Topology
Star Topology
Mesh Topology
Computer NetworksTypes of Topology:
Ring Topology
Star Topology
Mesh Topology
Bus Topology
Computer NetworksTypes of Topology:
Ring Topology
Star Topology
Mesh Topology
Bus Topology Mixed Topology
Computer NetworksOrganization Structure
Geographical dispersion of computers and end devices.
LANMANWANINTERNET
Computer NetworksOrganization Structure (LAN)
A Computer Network that interconnects computers within a limited area i.e. office, home, laboratory
Computer NetworksOrganization Structure (MAN):
It optimized for larger geographical area than LAN ranging from several blocks of building to entire city.
Computer NetworksOrganization Structure (WAN):
It is a network that interconnects computer over a broad area
Allows government & business organization to communicate regardless of geographical area.
Computer Networks Internet:
A global system of interconnected computer networks to serve billion of users worldwide.
Computer Networks (Internet Users)Rank
(No. Of Users)
Name of Country
Users (thousands
)
Percentage of Population
(%)1 China 477,000 36.3%2 United States 245,000 78.2%3 India 100,001 8.5%4 Japan 99,144 78.4%6 Germany 65,124 79.9%7 Russia 59,700 43%8 United Kingdom 51,442 82.0%9 France 45,262 69.5%12 South Korea 39,440 80.9%15 Iran 33,200 46.9%25 Pakistan 18,500 10.9%
FutureOf
Computer Networks
Future of Computer NetworksFuture Networks will be completely different
from present networks.
We are expecting even house hold appliances like electric bulb and toaster to be a part of network.
They will have their own IP Addresses to make them accessible & Controlled by Network.
Future of Computer Networks
Future of Computer Networks
Why do we need it?
Future of Computer Networks
For efficient use of energy & centralized control.
Future of Computer Networks In future, networks will be over whelmed
data.
The security concern will also increase.
It is not expected even for a full time system administrator to deal with these concerns.
Future of Computer Networks In other to cope with them, the networks will work on
different protocols named as adaptive networks.
Their job will be to provide personal experience for every user with minimum maintaince.
Adaptive networks will also support application like VOIP, Video Conferencing.
Future of Computer Networks Bluetooth will replace every wire that we use.
Future of Computer Networks Bluetooth will replace every wire that we use.
Its primary purpose was to replace USB but in future we are expecting to connect our TV to DVD Player by Bluetooth or even speaker to radio.
Future of Computer Networks Bluetooth will replace every wire that we use.
Its primary purpose was to replace USB but in future we are expecting to connect our TV to DVD Player by Bluetooth or even speaker to radio.