IT & ITS RELATED AND INFORMING DISCIPLINE Part 2 - Networking -…
IT & ITS RELATED AND INFORMING DISCIPLINE
Part 2 - Networking
A network, or communications network, is a system of interconnected computers, telephones, or other communications devices that can communicate with one another and share applications and data.
A collection of computers and devices connected together via communication devices and transmission media.
Benefits of NetSharing of peripheral devices:
Sharing of programs and data:
Security of information:
Access to databases:
Types of Networks
Local area network (LAN)
A LAN connects computers and devices in a limited geographical area, such as one office, one building, or a group of buildings close together.
Metropolitan area network (MAN)
A MAN is a communications network covering a city or a suburb.
Wide area network (WAN)
A WAN is a communications network that covers a wide geographical area, such as a country or the world.
Private Internet Networks: Intranets, Extranets, & Firewalls
For internal use only: An intranet is an organization’s internal private network that uses the infrastructure and standards of the Internet and the World Wide Web. Access to an intranet is not available to people outside the organization.
For certain outsiders: Extranets are private intranets that connect not only internal personnel but also selected suppliers and other strategic parties.
A firewall is a system of hardware and software that blocks unauthorized users inside and outside the organization from entering the intranet.