21
A LAN, abbreviated from Local Area Network, is a network that covers a
small geographical area such as homes, offices, and groups of buildings. Whereas
a WAN, abbreviated
from Wide Area Network, is a
network that covers larger
geographical areas that can span the globe. An example of a widely used WAN is
the Internet, which is a collection of tens of thousands of networks that connects
tens of billions of devices. Local Area Networks
predominantly use Ethernet
technology, which is a group of networking technologies that dictates how data is
transmitted over the physical media, with the most common media being CAT#
cabling. Local Area Networks can use both Layer 1 and Layer 2 devices; Layer 1
devices include HUB’s and repeaters and the Layer 2 devices that can be used are
switches and bridge devices. While LAN’s use Layer 1 and
Layer 2 devices,
WAN’s operate using Layer 3 devices such as multi
-layer switches and routers.
Dostları ilə paylaş: