Telecommunications - Electronic transmission of signals used for communications
Data communications - electronic transmission and reception of digital data.
Telecommunications network - connects computing and communication devices to
facilitate communications among devices.
Bandwidth - the rate of data transfer measured in bits per second (bps).
Main elements needed to form a network - Communication hardware that allows
devices to send and receive information.
Communication software that allows a computer or device to use the network to
complete a task.
A mode of transmission like wired or wireless communication.
Workstations - Computers attached to a network.
Local Resources - Resources that are available to a specific computer and may or may
not be shared over the network.
Example: files, drives, or other devices that are attached to a computer.
Network Resources - Resources that are located on the network.
Example: Servers, printers, storage, etc... located on the network.
Distributed Computing - Multiple remote computers working together.
Networking Media - Networking media is the physical media that carries signals used for
communications.
Coaxial Cable
Ethernet Cable
Fiber-optic Cable
Modems - Modulates and Demodulates signals
DSL modem - connects you to a DSL network.
Cable modem - connects you to CATV network
, Network Interface Card (NIC) - Device that allows a computer to connect to a network.
Wireless NIC (WNIC) is used to connect to wireless networks.
Without a NIC you will not be able to connect to a network
Hubs - Used as a central connection point for connecting computers.
Switches - Same as a hub except it passes information to only the computers that are
communicating with one another.
More secure than a hub.
Fundamental part of most networks.
Bridge - Used to connect multiple network segments.
Repeater - Like a bridge, connects multiple network segments.
Regenerates the signal to extend its range.
Gateway - The entry point for a network.
Router - A device that connects computers and networks, and transmits data to its
correct destination.
Firewall - A device that filters information coming into a network.
Prevents unauthorized access to a network.
Firewalls can be hardware or software.
Wireless Access Point (WAP) - A device that connects computers and other wireless
devices together to form a wireless network that allows them to transmit data wirelessly.
Local Area Network (LAN) - A small network that connects computers within an office,
building, house, or campus.
Metropolitan Area Network (MAN) - Connects networks within a city or metropolitan-size
area into a larger high-speed network
Wide Area Network (WAN) - A network that spans a large geographical area.
Connects LANs, MANs, and other WANs between cities, across the country, and
around the world.
Internet is the world's largest WAN.
Intranet - A private network that uses Internet & Web technologies to securely share
information or parts of an organization's information system.
Virtual Private Network (VPN) - A private network that uses a public network (Internet)
to connect remote sites or users together.
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