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-a network is a group of 2 or more computers connected to one another
-LAN (local area network) devices connected inside of a home, office, or building for LOCAL sharing
-A LAN can be connected to thousands of devices
-LAN must share a common ip adress numbering range
-WAN (wide area network) devices connected across a wide geographic area
-The INTERNET is the largest WAN and is represented as a cloud
LAN connection devices (hub, switch, WAP)
-Hub sends the message to everybody like a broadcast
considered dumb devices because they just move the signal along
-Switch sends the message to only ONE device in the LAN
-WAP is just a switch without wires
WAN connection=router
-Router sends message only to the destination device in LAN or in WAN
like making a long distance call directly to one person
a router is the only device that can connect two networks together "gateway"
MAC addresses can be spotted
they are also unique
Spoofing-pretending to be another computer/person with a mac address
basically like identity theft
To join a network you need an IP address
IP address-Internet Protocol Adress
must be unique
also known as the logical address of a device
Ip addresses are changeable and can belong to many organizations
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