ITGS:
MUST KNOW
TERMS
NETWORK
Internet
• Global system of interconnected computer
networks that use the standard Internet
Protocol Suite (TCP/IP) to serve billions of
users worldwide.
• Example: Internet Explorer, Firefox, Opera,
Chrome, Safari …
Intranet
• Private computer network that uses Internet Protocol technology
to securely share any part of an organization’s information or
network operating system within that organization.
• Advantages:
-Workforce productivity (locating & viewing info.)
-Communication
-Immediate updates
-Promote common corporate culture: Every user has the ability to
view the same information within the Intranet.
-Enhance collaboration
-Cost-effective (Data shared via web-browser rather than physical
documents)
• Kwangmyong (North Korean Intranet)
– Government authorized persons are allowed to use it.
– Main function: information censorship, preventing undesirable info. Being
accessed.
Extranet
• Computer network that allows controlled
access from the outside, for specific business
or educational purposes.
• ‘Federal Express' Tracking System
– By accessing FedEx's public site (fedex.com) and
entering tracking number, customer is able to locate
any package still in their system.
Virtual Private Network (VPN)
• Computer network that uses a public
telecommunication infrastructure such as the
Internet to provide remote offices or individual
users with secure access to their organization's
network.
Routers
• A device that forwards data packets
across computer networks.
• "traffic direction“
• Must consider SECURITY –firewall, VPN …
Switches
• A computer network device that
connects network segments.
• “Network Bridge”
• Switches: operate at many OSI( Open
Systems Interconnection: way of dividing
a communication system into smaller
parts) layers: physical, data
link, network or transport.
(multilayer switch)
Hubs
• A device for connecting multiple twisted
pair or fiber optic devices together and
making them act as a single network
segment.
• Works at layer 1(basic hardware
transmission technologies of a network)
of OSI model.