#4 Networks & the Effects of Using Them

IP (internet protocol) address

a unique number assigned to a device on a network that identifies it so data can be sent to the correct destination

MAC (media access control) address

a unique identifier assigned to a Network Interface Card (NIC)

what’s the difference between a MAC and IP address?

MAC address is a hardware address that doesn’t change, while an IP address can change

router

a device that sends data between different networks, connect a LAN to the internet

what information does a router use to redirect data?

routing table

how can a router connect to networks?

through cables or wirelessly

what happens when a router receives a data packet?

• Checks destination

• Sends to local switch/hub if for local network

• Sends to another router if for external network

WAN (wide area network)

a network that covers a large geographical area (eg. the internet)

WLAN (wireless local area network)

a network that connects devices wirelessly within a small area