Figure Communication network based on point-to-point communication
As a general rule (although there are many exceptions), smaller, geographically localized
networks tend to use broadcasting, whereas larger networks normally use are point-to point communication
. Classification based on Scale
Alternative criteria for classifying networks are their scale
. They are divided into Local
Area (LAN), Metropolitan Area Network (MAN) and Wide Area Networks (WAN)
. Local Area Network (LAN)
LAN is usually privately owned and links the devices in a single office, building or
campus of up to few kilometers in size
. These are used to share resources (may be
hardware or software resources) and to exchange information
. LAN's are distinguished
from other kinds of networks by three categories: their size, transmission technology and
topology
. LAN's are restricted in size, which means that their worst-case transmission time
is bounded and known in advance
. Hence this is more reliable as compared to MAN and
WAN
. Knowing this bound makes it possible to use certain kinds of design that would
not otherwise be possible
. It also simplifies network management.
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