S: Seasons of Change
BC: All copyrights reserved to: Ana Gaby Sanchez The American School of Tampico Mexico 2012
FC: Computer Network
1: Essential Question | Why Computer Networks are so important for current society?
2: Case: A visitor trying to use a blackberry to access ATS network services.
3: For the visitor to access the ATS network many steps happen. First, the visitor is the network client trying to use the LAN (Local Area Network).
4: The node is the blackberry because this is the device trying to connect.
5: The blackberry has a NIC (Network Interface Card) which it allows to connect to the Internet.
6: The blackberry signal goes from the NIC to the wireless access point.
7: The wireless access point send the signal to the SITE, through the optic cable.
8: Inside the SITE the router receives the signal and sends it to the firewall.
9: Then, the firewall is going to block unwanted access.
11: The visitor trying to use a blackberry to access the ATS, cannot access the LAN, because access was denied.