IB SL Computer Science
Unit 3: Network
3.1.1 Types of network
A network is a group of computer systems linked together in order to communicate and
share resources
Hub - Connection point for devices on a network. Devices connect to hub with ethernet
cables
Switch - Like a hub but it can identify the devices connected to the ports, so specific
datas can be sent to only one, also making it faster
Router - Connect multiple networks together
● LAN
○ https://docs.google.com/document/d/1CtOegSEquSApjBGfxdYKUtFpTLtK
Qf_jAJW2S6zl4IA/edit
○ local area network
○ Uses ethernet protocols
● WAN
https://docs.google.com/document/d/1weQHEuB7TRms9oTenYtwhmSrHhMzjCo
EO5AKcuCHFXo/edit?usp=sharing
○ wide area network
○ LANs connected together
○ Like the internet
, ● VLAN
https://docs.google.com/document/d/1voXGD0jj_hk6geehn52Su3uSnTWp7n8Tth
yG9UFpfjc/edit
○ Virtual local area network
○ Devices that appears to be on the same LAN despite being in different area
○ Simulated environment of LAN
● SAN
https://docs.google.com/presentation/d/1qmhIg0KF2s428ECFBDqMuooWq74V6
hBvvbcng0VLTk8/edit?usp=sharing
○ Storage area network
○ Each computer is connected to the storage unit which stores data
● WLAN
https://docs.google.com/document/d/1WMfVacDVFXegeb62Q3yKMCw-_wQGz_6
23UymIqlDbSo/edit?usp=sharing
○ Wireless local area network
○ Often called wifi but there are also other transmission technologies
● Internet
https://docs.google.com/presentation/d/13DkqGoxUb3e8pNoY2RkMcqI41lWY-6
GGdC4XDW-dPxU/edit?usp=sharing
○ Uses TCP/IP
○ World Wide Web is on the internet
● Extranet
https://docs.google.com/document/d/1Fy-KVu_8bgv5OttlhRmNDsBU6q0fYhfT1
Oaiwd7_D0w/edit
○ An exclusive private network that only certain people can access
○ Can require ID or username
● VPN
https://docs.google.com/document/d/1-fZ19IsSD670HD9th5lhkgaBBjUHYqItkX8
Bdxe-580/edit?usp=sharing
○ Virtual private network
○ Allow logging into a network remotely
● PAN
https://docs.google.com/document/d/1aPG6WIasalb-d8arJefYkDLhImOa6HxoxW
mXVwLoHlI/edit
○ Personal area network
Unit 3: Network
3.1.1 Types of network
A network is a group of computer systems linked together in order to communicate and
share resources
Hub - Connection point for devices on a network. Devices connect to hub with ethernet
cables
Switch - Like a hub but it can identify the devices connected to the ports, so specific
datas can be sent to only one, also making it faster
Router - Connect multiple networks together
● LAN
○ https://docs.google.com/document/d/1CtOegSEquSApjBGfxdYKUtFpTLtK
Qf_jAJW2S6zl4IA/edit
○ local area network
○ Uses ethernet protocols
● WAN
https://docs.google.com/document/d/1weQHEuB7TRms9oTenYtwhmSrHhMzjCo
EO5AKcuCHFXo/edit?usp=sharing
○ wide area network
○ LANs connected together
○ Like the internet
, ● VLAN
https://docs.google.com/document/d/1voXGD0jj_hk6geehn52Su3uSnTWp7n8Tth
yG9UFpfjc/edit
○ Virtual local area network
○ Devices that appears to be on the same LAN despite being in different area
○ Simulated environment of LAN
● SAN
https://docs.google.com/presentation/d/1qmhIg0KF2s428ECFBDqMuooWq74V6
hBvvbcng0VLTk8/edit?usp=sharing
○ Storage area network
○ Each computer is connected to the storage unit which stores data
● WLAN
https://docs.google.com/document/d/1WMfVacDVFXegeb62Q3yKMCw-_wQGz_6
23UymIqlDbSo/edit?usp=sharing
○ Wireless local area network
○ Often called wifi but there are also other transmission technologies
● Internet
https://docs.google.com/presentation/d/13DkqGoxUb3e8pNoY2RkMcqI41lWY-6
GGdC4XDW-dPxU/edit?usp=sharing
○ Uses TCP/IP
○ World Wide Web is on the internet
● Extranet
https://docs.google.com/document/d/1Fy-KVu_8bgv5OttlhRmNDsBU6q0fYhfT1
Oaiwd7_D0w/edit
○ An exclusive private network that only certain people can access
○ Can require ID or username
● VPN
https://docs.google.com/document/d/1-fZ19IsSD670HD9th5lhkgaBBjUHYqItkX8
Bdxe-580/edit?usp=sharing
○ Virtual private network
○ Allow logging into a network remotely
● PAN
https://docs.google.com/document/d/1aPG6WIasalb-d8arJefYkDLhImOa6HxoxW
mXVwLoHlI/edit
○ Personal area network
