Skip to main content

INTERNET TECHNOLOGY

 INTERNET TECHNOLOGY
WHAT IS NETWORK ?

          A network is a collection of computers and devices connected together via communications devices and transmission media.

COMMUNICATION DEVICE AND TRANSMISSION MEDIA
  
What is communication media ?

Communications device is any type of hardware capable of transmitting data, instructions, and information between a sending device and a receiving device.

Types of communication devices
  • Dial up modem 








  • Wireless modem







  • Network card








  • Digital modem(SDN,DSL and cable modem)






  • Wireless access point






  • Router









  • Switch









  • Hub






what is transmission media ?

Materials or substances capable of carrying one or more signals in a communications channel.

Two types of transmission media:

1.Physical transmission media/Guided media/Wired
•Twisted-Pair Cable, Coaxial Cable, Fiber-Optic Cable.

2.Wireless transmission media/Unguided media/ Wireless
•Infrared, Broadcast Radio, Cellular Radio, Microwave, communications satellite.

PHYSICAL TRANSMISSION MEDIA

 Twisted pair cable








Coaxial cable






Fiber optic
























WIRELESS TRANSMISSION MEDIA

 Infrared




Broadcast radio (Bluetooth, Ultra Wideband(UWB), Wifi, WIMAX)









Cellular Radio









Microwave






Communication satellite






ADVANTAGES OF NETWORK

•Easy Communication and Speed
-People can communicate efficiently by using a network such as emails, instant messaging, telephony, video conferencing, chat rooms, etc

•Ability to Share Files, Data and Information
-It can benefit large organizations to maintain their data in an organized manner and facilitate access for desired people
  • Sharing Hardware
-By sharing hardware it can reduce the cost of purchasing hardware because there’s no need to have individual  hardware such as printer for each and every computer in the company.
•Sharing Software
-It can reduce the cost of buying software by networking their computers because networkable versions of software are available.
         •Security
        -Sensitive files and programs on a network can be password protected and can only be accessed by the authorized users.
         •Speed
         -Sharing and transferring files within networks is very rapid, depending on the type of network.
         -This will save time while maintaining the integrity of files.
DISADVANTAGE OF NETWORK
•Breakdowns and Possible Loss of Resources
-Breakdown of the whole network due to an issue of the server may lead to loss of important data of the server.
•Expensive to Build
-Building a network  for large scale organizations are very pricey especially to buy and replace cables and other hardware .
•Security Threats
-There are hackers who are trying to steal valuable data of large companies for their own benefit.
•Bandwidth Issues
-Heavy users who consume a lot more bandwidth will affect other users.

Comments

Post a Comment

Popular posts from this blog

NETWORK ARCHITECTURE

What is Network Architecture ? ⇒Network architecture is the configuration of computers, devices and media on a network.   Also known as the design of a communication  network . It is a framework for the            specification of a  network's  physical components and their functional organization and    configuration, its operational principles and procedures, as well as data formats use. Categories of Network Architecture Peer-To-Peer network Client/Server network Different between Client-Server and Peer to Peer Network Architecture Category Client/Server Peer-to-peer Definition One or more computers act as a server, and the other computers on the network request services from the server. Each computer, called a peer, has equal responsibilities and capabilities, sharing haedware (su...
Post a Comment
Read more

INTERNET SERVICES AND TYPES OF WEBSITES

INTERNET SERVICES world wide web e-mail instant messaging voice over protocal (VoIP) message board File Transfer Protocol  world wide web ( www ) www or web consists of a worldwide collection of electronic documents each electronic component on the Web is called Web page A website is a collection of related web pages and associated items, such as documents and pictures, stored on a web server. Web server is a computer that delivers requested web pages to your computer. Visitors to a dynamic web page , can customize some or all of the viewed content such as desired stock quotes, weather for a region or ticket availability for flights . WWW e-mail short for electronic mail one of the original services on the internet an email address is a unique name that consists of a user name and domain name that identifies the user basic form of an email address is:             username@hostname.subdomain.domain exam...
Post a Comment
Read more