Today
we will be looking at a very lovely topic; the internet. The internet has become a good part of our lives so we need to understand some what it is all about.
The word internet is formed from two words; international and
network. An internet is simply an international network.
Hence the term internet can be defined as a global connection
of computers which provides communication and sharing of and
resources.
The benefits of the internet include;
• Faster
communication channels like e-mailing, file transfer, internet calls, chats
etc.
• Latest news
and gossips.
• Entertainment
like movie, videos and music download.
• Socialization
using median like facebook, twitter, Instagram, pinterest, tumblr, hi5, badoo,
linkedin, yookos, google +, vine, meetup, tagged, ask.fm, flickr, meetme,
classmates etc
• E-commerce sites
for buying and selling online, e-payment and internet banking
• Education:
schooling online is now possible.
• Availability
of research materials.
CLASSIFICATION OF NETWORKS
By Scale or Geographical Coverage
Computer networks may be classified according to the scale or extent of
reach of the network, for example as a Personal area network (PAN), Local area network (LAN), Campus area network (CAN), Metropolitan area network (MAN), or Wide area network
(WAN).
Personal
area network (PAN)
This is a
computer network used for communication among computer devices (including
telephones and personal digital assistants) close to one person. The devices
may or may not belong to the person in question. The reach of a PAN is
typically a few meters. PANs can be used for communication among the personal
devices themselves (intrapersonal communication), or for connecting to a higher
level network and the Internet (an uplink).
Personal
area networks may be wired with computer buses such as USB and FireWire.
A wireless personal area network (WPAN) can also be made possible with network
technologies such as IrDA and Bluetooth.
Local Area Network (LAN)
A network
covering a small geographic area, like a home, office, or building. Current
LANs are most likely to be based on Ethernet technology. The defining
characteristics of LANs, in contrast to WANs (wide area networks), include
their much higher data transfer rates, smaller geographic range, and lack of a
need for leased telecommunication lines. A LAN network can be defined by the
manual IP Address or by the selection of Auto IP option.
Campus Area Network (CAN)
A network that connects two or more LANs but that is limited to a specific
(possibly private) geographical area such as a college campus, industrial
complex, or a military base. A CAN, may be considered a type of MAN
(metropolitan area network), but is generally limited to an area that is
smaller than a typical MAN.
Metropolitan Area Network (MAN)
A network
that connects two or more Local Area Networks or CANs together but does not
extend beyond the boundaries of the immediate town, city, or metropolitan area.
Multiple routers, switches & hubs are connected to create a MAN
Wide Area Network (WAN)
A WAN is a
data communications network that covers a relatively broad geographic area
(i.e. one country to another and one continent to another continent) and that
often uses transmission facilities provided by common carriers, such as
telephone companies. WAN technologies generally function at the lower three
layers of the OSI reference
model: the physical layer, the data link layer,
and the network layer.
Lovely post there.
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