Client-server model is a server with computers on a network connected to it. This is oftren use for services and resources often through the internet
In a client-server model what is the client?
the COmputer
In order to access the services/resources of a server in a client access must be authorized
In a thin client all computational resources are served by a single computer (server) which provides all but the most essential resources to the thin clients. Costs are often lower and it is easier to manage upgrading and imposing security.
P2P networks don't have a central server and instead of numerous 'peers' which can directly interact with eachother.
It is easy to scale a p2p network as another peer can just be added or removed
Each device in a P2P both provides and receives resources
ISPs are companies that privately own core networks that connect with other ISPs core networks allowing the internet
There are three tiers of ISP, what is tier 3:
Local ISPs that you can have contracts with and that provide internet access
There are three tiers of ISP, what is tier 2:
The ISPs that go between tier 1 and tier 3, they are regional or country-wide. They are otherwise the same as tier 3s but often charge the tier 3s to access their system
There are three tiers of ISPs, what is tier 1:
Tier 1 span the globe, they charge tier 2 providers for access to the tier 1 servers
Routers manage communication between devices on a network, there are wired and wireless variants
Routers encapsulate data with metadata before sending it
A network switch is not required for internet access but is used by large businesses to connect massive amounts of devices with ethernet cables.
Layer 2 network switches use media access control addresses (MAC addresses), to send data to the correct device