TYPES OF NETWORKS

MAINFRAME

Mainframe computers are typically large, metal boxed computers with large processing abilities. The terminals are called "dumb terminals" because they only send and receive data, leaving the processing to the mainframe.

CLIENTS

The client/server refers to the way two computer programs interact with each other. The client makes a request from the server, who then fulfills the request. Although this idea can be used on one computer it is an efficient way for a network of computers in different locations to interconnect.

LAN

LAN stands for Local Area Network. The first LANs were created in the late 1970s. LANs are small networks constricted to a small area, like a city. LANs are used to share resources like storage, internet, etc. . .
A 'node' on a LAN is a connected computer or device like a printer.
WAN

A Wide Area Network
WAN stands for Wide Area Network. WANs are very large networks that interconnect smaller LAN networks, for a large geographic area like a country (i. e., any network whose communications link crossmetropolitan, regional, or national boundaries.)
WANs are usually for private companies, however, some built by internet service providers connect LANs to the internet.

• WAN can use a combination of satellites and microwaves, and can link a variety of computers from mainframes to terminals.

A 'node' on a WAN is a LAN.

MAN
When the LANs that you want to connect are not far apart, just blocks away, then you can make a MAN (Metropolitan Area Network). The main difference between a WAN and a MAN network is the speed of the connection. Because the LANs are so close in a MAN, high speed fiberoptic cables are affordable.
PAN

Personal Area Network: a network on you. Usually, uses short rangewireless technology is used to connect devises like a cell phone and a PDA.
HAN

Home Area Network: uses cable, wired, or wireless connections to connect a homes' digital devices. For example, fax machines, computers, DVD's etc.
GAN

A similar system such as HAN would be GAN which stands for Garden Area Network, and allows for one system to control such devices like garden lights, sprinkler systems and alarm systems.

TYPES OF NETWORKS

MAINFRAME

Mainframe computers are typically large, metal boxed computers with large processing abilities. The terminals are called "dumb terminals" because they only send and receive data, leaving the processing to the mainframe.

CLIENTS

The client/server refers to the way two computer programs interact with each other. The client makes a request from the server, who then fulfills the request. Although this idea can be used on one computer it is an efficient way for a network of computers in different locations to interconnect.

LAN

LAN stands for Local Area Network. The first LANs were created in the late 1970s. LANs are small networks constricted to a small area, like a city. LANs are used to share resources like storage, internet, etc. . .
A 'node' on a LAN is a connected computer or device like a printer.
WAN

A Wide Area Network
WAN stands for Wide Area Network. WANs are very large networks that interconnect smaller LAN networks, for a large geographic area like a country (i. e., any network whose communications link crossmetropolitan, regional, or national boundaries.)
WANs are usually for private companies, however, some built by internet service providers connect LANs to the internet.

• WAN can use a combination of satellites and microwaves, and can link a variety of computers from mainframes to terminals.

A 'node' on a WAN is a LAN.

MAN
When the LANs that you want to connect are not far apart, just blocks away, then you can make a MAN (Metropolitan Area Network). The main difference between a WAN and a MAN network is the speed of the connection. Because the LANs are so close in a MAN, high speed fiberoptic cables are affordable.
PAN

Personal Area Network: a network on you. Usually, uses short rangewireless technology is used to connect devises like a cell phone and a PDA.
HAN

Home Area Network: uses cable, wired, or wireless connections to connect a homes' digital devices. For example, fax machines, computers, DVD's etc.
GAN

A similar system such as HAN would be GAN which stands for Garden Area Network, and allows for one system to control such devices like garden lights, sprinkler systems and alarm systems.

Quotes on Age and Aging

"Old age is the verdict of life."

Barr, Amelia E.

"I will never be an old man. To me, old age is always 15 years older than I am."

Baruch, Bernard M.

"Since it is the Other within us who is old, it is natural that the revelation of our age should come to us from outside --from others. We do not accept it willingly."

Beauvoir, Simone De

"It is old age, rather than death, that is to be contrasted with life. Old age is life's parody, whereas death transforms life into a destiny: in a way it preserves it by giving it the absolute dimension. Death does away with time."

Beauvoir, Simone De

"We grow neither better or worse as we get old, but more like ourselves."

Becker, May L.

INTERNET PROTOCOL

TCP/IP

How information is sent through the internet. TCP (transmission control protocol) means cutting up many copies of the webpage into packets and sending them through various channels within the internet, all eventually going to you. IP (internet protocol) is the 12 digit address (like 142.109.265.155) that every computer on the internet has a unique one of. This address is placed on each packet so they will find your computer.

Hyper Text Transfer Protocol (http)

It means pages automatically load (automatically saved in cache instead of asking you where you want to save it). Original use of http was to give people a way to publish and retrieve hypertext pages within the Internet.

File Transfer Protocol ( ftp)

File Transfer Protocol is used to transfer files over a network to other computers. The difference from http is that you indicate where you want to save the files to (or upload them from).
Files offered cover nearly anything that can be stored in a computer. For example, photos, gaming, music and statistics.