ITEC Chapter 5

hub

A basic network device that provides multiple ports for connecting nodes.

data warehouse

A central repository where records from multiple databases are stored.

IS ( information system)

A complex system for acquiring, storing, organizing, using, and sharing data and information

DDoS ( distributed denial-of-service)

A network attack that attempts to shut down or block access to websites or other network resources by overwhelming them with requests.

gateway

A node on a network that serves as an entrance to another network. It helps one network understand the packet headers from another network.

authenication

A secure measure used to confirm an individual's identity.

MIS ( management information system)

A set of software tools that enables managers to gather, organize, and evaluate information.

DSS ( decision support system)

A special application that collects and reports certain types of data, thus helping managers make better decisions.

countermeasure

Any step you take to ward off a threat

What happens if Cable 4 in a Ring Topology goes down?

Cable 1 will not be able to communicate and transmit to C2 ( bc it is going clockwise)

Router keeps what?

Every address

hacktivism

Hacking with a social or political agenda.

NIC ( network interface card)

How identify every computer on the network.

Scalabilty

If business is growing, your website needs to grow as well.

Disadvantage of Bus Topology

If one cable goes down, the entire network goes down

Ethernet

It is network card. It is used to physically connects.

phishing

Luring individuals into entering personal information into a website controlled by a hacker.

botnet

Massive networks of zombies that can be used by a hacker to spread malware, send spam, and conduct carefully orchestrated network attacks.

What is attenuation always associated with?

Repeater

Signal only goes clockwise

Ring Topology

If Cable 1 stops working, only cable 1 stops working

Star Topology

mission-critical

System that must run without failure or with nearly instant recovery from failure.

interoperability

The ability of each organization's information system to work with the other, sharing data and services.

data mining

The discovery of new patterns or relationships between data.

What do gateways connects?

WAN ( Wide Area Networks)

To create a wireless LAN, what do you need?

WAN ( wireless access point)-all nodes connect to the device in order to communicate wirelessly.

Intranet

an internal version of the Internet. It uses the same software and service structure as the Internet, but it contains only the company's private information.

fault-tolerant

computers are able to continue their operation even when problems are present.

WAN ( wide area network)

connection of two or more central computer or LANs, generally across a wide geographical area. For example, a company may have its corporate headquarters and manufacturing plant in one city and its marketing office in another

coaxial cable

consists of a single copper wire that is surrounded by insulation and a wire mesh shield. All of these components are located inside a plastic sheath that looks like many cable wires

fiber-optic cable

consists of a thin strand of glass that transmit pulsating beams of light rather than electric current.

LAN ( local area network)

data communication system consisting of multiple devices that are relatively near each other and are physically connected using cables or wireless media.

Advantage of Bus Topology

good amount of wires and caps to keep cables inside

What do packets increase?

increase transmission efficiency and reduce the chances of for lost or broken trasnmission.

network media

link parts of a computer network

twisted-pair cable

normally consists of four pairs of wires that are twisted around each other.

packet

pieces of a message broken down into small units by the sending device and reassembled by the receiving device in a network.

Extranet

share some of its intranet resources with people outside the organization. This can include selected contractors and partners that have ongoing business with the company.

bandwidth

the amount of data that can be transmitted over a given amount of time.

attenuation

the loss of intensity and clarity of the data signal being transmitted.

node

used to carry one connection point to another