1.2.2 - Describe the roles that a computer can take in a networked world.
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Give 4 possible tasks for a networked computer.
Depending on the software that is installed on a networked computer, it can do a variety of different tasks: 1) Client 2)Server, e.g. email or DNS 3) Router 4) Firewall
What are the two types of network architecture?
1) Client-server. 2) Peer-to-peer.
What is a server?
A computer that provides data to other computers.
Give 3 examples of types of server.
1) Web server. 2) Mail server. 3) File server.
What is more important to the function of a server, the software or the hardware?
The software. While server software is specific to the type of server, the hardware is not as important.
What kind of relationship does a server normally have to its clients?
A one-to-many relationship.
Must servers accept all client requests?
No - they can reject some.
What happens when a server accepts a client request?
If the connection is accepted, the server establishes and maintains a connection with the client over a specific protocol.
What is a router?
A router is a hardware device that routes data from a LAN to another network. It can be a separate hardware device or software loaded onto a server.
What is a router responsible for?
It is responsible for sending data packets to the correct host, subnet or network.
What does a DNS do?
A DNS (Domain Name Server) links URLs (also known as domain names) to IP addresses (also known as web addresses).
What is a firewall?
In computing, a firewall acts as a barrier between a trusted system or network and outside connections, such as the Internet. It is more like a filter than a wall, and can be created using either hardware or software.