# data[].attributes.body
-internet is a wordwide collection of network  that connect millions of bussiness, government agencies, educational institution and individual.
Advantage of internet
-easy to communicate
-provide abundant information
-improve education
Disadvantage of the internet
-security issues
-social disconnect
-theft of personal information
Intranet
*Definition
-private network  of an organization  which use internet technologies  to share organization's information  with its employees.
*Accessibility
- only employees within an organization  are  allowed  to access the intranet.
*Usage
-share organization's information  or operation  with employees.
*Example
-internal network in college  that provides student's information.
Extranet
*Definition
-private network  of an organization  that securely  share parts of organization's information  with its suppliers, vendors, partners, customers or otger organization.
*Accessibility
- limits access  to people outside company  such as suppliers, vendors, customers or other organization.
*Usage
-share information  among bussiness partner  such as check status.
*Example
-package shipping company  that allows their customer  to access their private network  to print shipment bills.

# data[].attributes.body
Internet technology 🖥📱🎮

# data[].attributes.body
2.3)Classification of network
-can be classified by 2
i)Local Area Network (LAN)
ii)Wide Area Network (WAN)
Definition*
i)LAN
-A network  that connects computers  and device  in a limited geography area. (home, school ,office building)
ii) WAN
-A network  that covers a large geographic area. (City, country, or the world)

# data[].attributes.body
2.2) Example:
Client/Server

# data[].attributes.body
2.2) Example:
Peer-to-peer

# data[].attributes.body
2.2)Network Architecture
i)Definition*
The configuration/design  of computers, devices, and media  on a network.
ii)Types of network architecture
- peer-to-peer
- client / server
a)Peer-to-peer:
-network which each computer or mobile devices  have equal responsibility  & capabilities  in sharing hardware, data or information  with other computer  on a network.
Advantage:
-easy & inexpensive to set up
-more reliable because failure of 1 computer   will not affect others.
Disadvantage:
-lack of security
-data recovery / backup very difficult
b)Client/server:
-network  which one or more computers act as server  and other computer request services from server  via network.
Advantage:
-better security and management of network
-data backup & recovery is easy since all data stored in server.
Disadvantage:
-high cost to set up & maintain the network
-less reliable because too depends on server

# data[].attributes.body
2.1)Basic concept of network
i)Network *
Definition:
-A collection of computers and devices which are connected together via communication devices & transmission media  to share resources.
ii) Communication device
Defintion:
- any type of hardware capable of transmitting data, intruction and information  that connect  the sending device  and receiving device  to transmission media.
Example:
Modem,hub,router, network card
iii) Transmission media
Definition :
-Consist of material  or substance  on which data, instruction or instruction travel.
2 types  : i)wired
ii)wireless
i) wired
-twisted pair cable, coaxial cable,fiber optic       cable
ii) wireless
-infrared,microwaves,communication                 satellite