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Communicating Digital Content: WIRED AND WIRELESS NETWORKS & DEVICES -…
Communicating Digital Content
: WIRED AND WIRELESS NETWORKS & DEVICES
DIGITAL COMMUNICATION - Digital communications describes a process in which two or more computers or devices transfer data, instructions, and information
COMMUNICATION LINES
Cable
DSL
FTTP
T-Carrier
ATM
ADSL- a type of DSL that supports faster downstream rates than upstream rates
NETWORK- a collection of computers and devices connected together via communications devices and transmission media
Advantage of network- facilitating communications
,sharing haedware,data and information,software, transferring funds
Local area network( LAN)- a network that connects computers and devices in a limited geographical area
wireless LAN (WLAN)- a LAN that uses no physical wires
metropolitan area network (MAN)- connects LANs in a metropolitan area
wide area network (WAN)- a network that covers a large geographic area
personal area network (PAN)- a network that connects computers and devices in an individual’s workspace using wired and wireless technology
network architecture- The configuration of computers, devices, and media on a network
client server network & peer to peer network
COMMUNICATION SOFTWARE
Help users establish a connection to another computer, mobile device, or network
Manage the transmission of data, instructions, and information
Provide an interface for users to communicate with one another
NETWORK COMMUNICATIONS STANDARDS&PROTOCOL
Ethernet- a network standard that specifies no central computer or device on the network (nodes) should control when data can be transmitted
Token ring-standard specifies that computers and devices on the network share or pass a special signal (token)
TCP/IP -a network protocol that defines how messages (data) are routed from one end of a network to another
Wi-Fi -identifies any network based on the 802.11 standard that specifies how two wireless devices communicate over the air with each other
LTE- : a network standard that defines how high-speed cellular transmissions use broadcast radio to transmit data for mobile communications
Bluetooth -a network protocol that defines how two Bluetooth devices use short-range radio waves to transmit data
UWB (ultra wideband)-a network standard that specifies how two UWB devices use short-range radio waves to communicate at high speeds with each other
IrDA - transmits data wirelessly via infrared (IR) light waves
RFID - a protocol that defines how a network uses radio signals to communicate with a tag placed in or attached to an object, an animal, or a person
NFC (near field communication) - is a protocol, based on RFID, that defines how a network uses close-range radio signals to communicate between two devices or objects equipped with NFC technology
COMMUNICATION DDEVICES- any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device
Broadband modem- sends and receives data and information to and from a digital line
wireless modem - uses a mobile phone provider’s network to connect to the Internet wirelessly from a computer or mobile device-.allow users to access the Internet wirelessly using a mobile service provider's network.
wireless access point(WAP) - a central communications device that allows computers and devices to transfer data wirelessly among themselves or to a wired network
network card- enables a computer or device that does not have built-in networking capability to access a network
router- connects multiple computers or other routers together and transmits data to its correct destination on a network & Through a router, home and small business networks can share access to a broadband Internet connection
Wireless router- users can create a mobile hot spot via 3G or 4G mobile broadband Internet service
Broadband router
Broadband wireless router
Mobile broadband wireless router
hub/switch - a device that provides a central point for cables in a network ,a central point that connects several devices in a network together, as well as connects to other networks
HOME NETWORK- home users connect multiple computers and devices together -
TRANSMISSION MEDIA- Transmission media carries one or more communications signals
Broadband media transmit multiple signals simultaneously
The amount of data, instructions, and information that can travel over transmission media sometimes is called the bandwidth
Latency is the time it takes a signal to travel from one location to another on a network
PHYSICAL TRANSMISSSION MEDIA
coaxial cable-
fiber-optic cable-consists of hair-thin strands of glass or plastic that carry data as pulses of light
twisted pair cable- cable consists of one or more twisted-pair wires. Each twisted-pair wire usually is color coded for identification. Landline phone networks and LANs often use twisted- pair cable
WIRELESS TRANMISSION MEDIA -
MICROWAVES - radio waves that provide a high-speed signal transmission
BROADCAST RADIO- a wireless transmission medium that distributes radio signals through the air over long distances
COMMUNICATION SATELITE- a space station that receives microwave signals from an earth-based station, amplifies it, and broadcasts the signal over a wide area to any number of earth-based stations
CELLULAR RADIO- a form of broadcast radio that is in wide use for mobile communications
GPS (global positioning system0) - a navigation system that consists of one or more earth-based receivers that accept and analyze signals sent by satellites in order to determine the receiver’s geographical location