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19 Cards in this Set

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802.11x-
Wi-Fi- The fastest growing wireless LAN technology. Allows multiple computers to connect to a LAN through a base station (Wireless access point) up to 150 feet away.
802.11g
Low cost and high bandwidth, the newest Wi-Fi network.
802.11n
3 times the bandwidth of g. not currently available.
802.11e
802.11e- better quality of service, especially the timely delivery of data packets. Good for Voice over IP and video conferencing.
802.11i
Higher security, lets businesses use wireless networks for more sensitive transactions.
e-commerce
e-commerce- The process of sharing business information, maintaining business relationships, and conducting business transactions through the use of telecommunications networks.
Ecommerce 1
1995-2001- tremendous growth and capital investment, self regulated environment, vision of “perfect information marketspace”
Ecommerce 2
2001-2006- initially characterized by reduction in IT capital expenditures b/c of Y2K issues, excess telecommunications capacity, and exorbitant valuation of e-commerce companies compared to their potential profitability.
Fiber optic cable
replacing copper wires. Use light wavers to carry info. Can transmit ½ gigabit per second. Can transmit lots of multimedia data while handling voice messages at the same time.
Fields in Excel
Each data item within a folder. The first row contains the column labels or field names. A group of related characters
LAN Hub
LAN Hub- Each computer using a LAN is an individual node, and the Nodes are connected to hubs or switches. A Hub only allows a single message at a time to move across a LAN. Not very good.
Internet Protocols
IP- the most common one is TCP/IP (transmission control protocol/internet protocol.) They define how info can be transferred between machines and how machines on the network can be identified with unique addresses.
Records in Excel
each individual folder is known as a record. A group of related fields
Router
hardware devices or software programs that route messages as they travel between networks via bridges and gateways. Used to be called IMP- interface message processor. Used for packet switching to make sure the hpackets were clear and mistake free.
Twisted pair cable
the most common type of LAN cable. Contains copper wires that resemble those in standard telephone cables. Connects a node to a hub or a switch.
Ultrawideband
short range wireless technology that transmits ultra high speed signals over a wide spectrum of frequencies.
WANs
Network that extends over a long distance. Each network site is a node on the network. Data is transmitted long distance between networks on a collection of common pathways known as the backbone.
WiMax
a wireless alternative to cable or DSL. Provides high speed internet access to customers up to 30 miles away using a dish antenna.
Wireless networks
- part of the LAN technology. Each node has a tiny radio (sometimes infrared) transmitter that connects to its network port so it can send and receive data through the air. Generally slower than wired LANs are.