1.2.2+Describe+the+roles+that+a+computer+can+take+in+a+networked+world.

=__**1.2.2 Describe the roles that a computer can take in a networked world:**__=

__**Roles include**__
 * Client: a piece of computer hardware or software that accesses a service made available by a server.
 * Server: is a system (software and suitable computer hardware that responds to requests across a computer network to provide or help to provide a network service.
 * Email server: a message transfer agent or mail transfer agent or mail relay is a software that transfers electronic messages from one computer to another using a client-server application architecture.
 * DNS server: A domain name server is a computer server that hosts a network service for providing responses to queries against a directory service. Functions to translate the human memorable domain names and host names into corresponding numeric internet protocol.
 * Router: is a device that forwards data packets between computer networks, creating an overlay inter-network.
 * Firewall: is a software of hardware-based security system that controls the incoming and outgoing network traffic by analyzing the data packets and determining whether they should be allowed through or not, based on a rule set.

Created By: D3LTA Last update:9/5/13

Sources:
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