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18 Cards in this Set
- Front
- Back
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What is Metcalfe's Law?
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-the usefulness of a network equals the square of the number of users
-until the mass is reached, change in tech only affects the tech... |
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Discuss the role of open systems in the modern internet world.
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-common standards for hardware, software, apps, & networks
--provides greater connectivity & network interoperability |
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What is middleware?
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software that helps diverse networks communicate with each other
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What are the differences between analog and digital communication?
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they are the methods used to convert info into an electrical signal
analog = an electrical curren is generated that is proportional to the quantity being observed digital = quantity being observed is expressed as a number |
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What is an ISP?
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Internet service provider
-company providing easy access to the internet -they are connected to one another through network access points |
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What is an intranet? An extranet?
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Intranet = others can access an intranet via extranet links
--protected by firewalls, passwords, etc. --supports: 1. communications & collaborations 2. business operations & management 3. web publishing 4. intranet portal management Extranet = use internet teach to connect to the intranet of a business to the intranets of another --unsecured &/or virtual private |
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What is a VPN?
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establish secure intranets & extranets
--Virtual Private Networks |
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Discuss the differences between WAN and LAN.
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WAN = network that covers a large geographic area
--Wide area network LAN = connects computers w/in a limited physical area, like a building --Local area network |
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Discuss the client/server architecture.
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clients = end personal computer user
servers = manage the networks processing = shared between client & server --large computer systems are replaced |
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What is P2P? Discuss the two major types of P2P networks
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peer-to-peer networks
1) central server architecture --file-sharing software connects all PCs to a central server 2) Pure peer to peer Arch. --file-sharing software connects one PC to another ONLINE user ex.....DL'ing music |
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Discuss the features of twisted pair, coaxial cable, fiber optic cable.
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twisted pair wire = phone wire, copper wire twisted into pairs
coaxial cable = copper or aluminum wire wrapped w/ spacers to insulate & protect it...1 wire in center. TV fiber optic = filaments of glass fiber wrapped in a protective jacket. Broadcasts light |
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What is the "Last Mile" problem?
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networks use fiber optic, but at your house you are wired w/ twisted pair, so it gets slower to your house
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What is Bluetooth? Where is it used?
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--connects PCs to devices
--used at a short range |
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What is a switch? A router? A hub? A gateway?
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--Inter-network processors
--helps us connect to the internet |
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What are the major network topologies?
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1)star network-central computer
2) ring network-ring 3) bus network-same comm. channel 4)mesh network-connect comps in ring 5) switch - data communication |
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Describe TCP/IP.
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TCP = transmission control protocol
IP = Internet protocol --5 layer telecommunications protocol used by the internet |
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What is VOIP?
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Voice over internet protocol
--using internet to pass voice data using IP instead of a telephone network |
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Discuss the differences between circuit switching and packet switching.
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circuit = switches circuits to make a connection. Phone in old days.
Packet = breaks messages into packets & sends separately |
