Summary C724 Unit 6 Systems Development and Decision Making

Summary C724 Unit 6 Systems Development and Decision Making

Unit 6 C724 Cohort C724 Unit 6 Systems Development and Decision Making

Unit 5 study guide

 Telecommunication is the process of exchanging information between various

entities over electrical, electromagnetic, or digital networks

 The public switch telephone network (PSTN) is the total circuit switch-based

telephone network that uses technology invented by Alexander Graham Bell.

 Cat5 cable is typically made of copper but is much smaller than copper

building wire that is used to carry electricity.

 The Internet is a telecommunication network composed of interconnected

computers using Internet Protocol (IP)

 There are two basic types of computer networks.

o LAN stands for local area network, and typically connects computer

systems of an organization or a floor of a building.

o WAN stands for wide area network, and typically connects business

campuses consisting of computer systems across large distances.

o A LAN is therefore a small network, while a WAN is connection between

smaller networks, which creates larger networks.

 POTS, the plain old telephone system.

 Voice over Internet Protocol (VoIP) is a modern telecommunications

technology that offers convergence between voice and data networks. VoIP is

a type of broadband application, similar to video, in which voice calls are

transmitted over the Internet. VoIP has rapidly replaced telephone voice

traffic.

 ISPs, or Internet Service Providers, offer services to the business to gain access

to the Internet.

 Quality of Service (QoS) is used to measure performance for specific types of

data communications and ensure that communications are effectively

transmitted

 TCP/IP stands for Transmission Control Protocol/Internet Protocol, can be

shortened to IP, and is the standard communication rule of the Internet.

Internet Protocol governs Internet data network rules.

 POP stands for Post Office Protocol in the application layer of the Internet

standard protocol and is used to retrieve email from a mail server.

 Wi-Fi is part of the IEEE 802.11 wireless communication protocol used to

connect devices in a LAN environment.

 Bluetooth is a wireless protocol used to connect devices over short distances.

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 FTP stands for File Transfer Protocol and is a protocol used to transfer files

from one computer to another.

 PPP stands for Point-to-Point protocol. Encryption is used to ensure the

privacy of the content being communicated.

 Packet switched networks group data in packets and are transmitted in

multiple simultaneous communication sessions.

 Ethernet requires a specific type of hardware to function, whereas a TCP/IP

can be recognized by most operating systems. Like TCP/IP, Ethernet is a packetbased data transfer standard that divides data streams into packets, not virtual

circuits. used in local area networks (LANs)

 ATM stands for Asynchronous Transfer Mode and was designed to provide

quality of data of voice and video via circuit switching.

 A packet analyzer or sniffer is used to monitor or log traffic on a network for

troubleshooting or analysis. Also known as network sniffers, packet analyzers

can be used by hackers to obtain authentication information needed to hack a

network. Not a hardware device.

 A hub is a networking device that connects computer devices together in a

LAN, sending data traffic to all networked components.

 Firewalls are used to prevent intrusion into a network and are not related to

data communication protocols. A firewall can be hardware with software, or is

just software embedded in a network at strategic access locations to prevent

intrusion.

 A switch sends data traffic to different destinations, connecting single

networks, and is not assigned an IP address.

 A router is a networking device used to pass packets to the next network node

until the packets reach the ultimate destination. Routers are used to connect

multiple networks together and forward data packets between those separate

networks to the destination host.

 Core routers are more powerful and are used to optimize high volume data

transmission. Core routers have enough processing power to handle multiple

protocols.

 an edge router (also known as a boundary router) transfers data packets

between one or more LANs and an asynchronous transfer mode (ATM)

network.

 Bridges in network topologies are used to connect or link separate networks

together, but bridges do not have data switching capability.

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