Network Architecture

Friday,29 December2017

Today,I would like to share about what is network architecture?

Network architecture is the configuration of computers,devices and media on a network.
There is two categories of network architecture

• Peer-to-peer network
• Client/server network

Here are the differences between Client/Server and Peer-to-Peer network

  

Category	Client/server	Peer-to-peer
Definition	One or more computers acts 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 hardware(such as a printer),data,or information with other computers on the peer-to peer network.
Size	For medium and large network	For small network fewer than 10 computers
Operating system	Needs a specific operating system such as Windows Server 2008	Does not need a specific operating system
Training	Needs training	Does not need training
Set up	More difficult to set up	Easy to set up
Installation	More expensive to install	Less expensive to install
Implementation	Big corporations or organizations with high security data	Small businesses and home users

Computer Network

What is the computer network?

Today, I would like to share about what topic that I learn in this semester.First topic is Internet Technology and the subtopic is the computer network.

For your information,computer network is  the collection of computer and devices connected together via communication device and transmission media.

Here is the example of the computer network

The other subtopic that I have learn is about transmission media and communication device.

So,what is the communication device and transmisson media?

• Communication device  is any type of hardware capable of transmitting data,instructions,and information between a sending device and a receiving device.
• Transmission media is materials or substances capable of carrying one or more signals in a communication channel.

Guided media

Unguided media

Example of communication devices

Types of communication devices:

Switch

• A connection device similar to a hub but more sophisticated,including functionality that allows it to control and manage data transmissions.

Wireless Access Point

• Allows computers and devices to transfer data wirelessly  among themselves or to transfer data wirelessly to a wired network

Network Card

• Enables a computer or device that does not have built-in networking capability to access a network.

 

                                                                                              Hub

     A connection device that allows multiple connections to the network.

So,that is the some example of the communication devices that I have learnt.

There is  two types of the transmission media which is :

• Guided media
• Unguided media

GUIDED MEDIA	UNGUIDED MEDIA
·         Twisted pair cable ·         Coaxial cable ·         Fiber-optic cable	·         Infrared ·         Broadcast radio ·         Cellular radio ·         Microwave ·         Communication satellite

Advantages and disadvantages of network

Advantages of network	Disadvantages of network
·         Easy communication and speed -          People can communicate efficiently by using a network such as emails,instant messaging, telephony,etc	·         Security threats -          There are hackers who are trying to steal valuable data of large companies for their own benefit
·         Security -          Sensitive files and programs on a network can be password protected and can only be accessed by the authorized users.	·         Expensive to build -          Building a network for large scale organization are very pricey especially to buy and replace cables and other hardware.
·         Ability to share files,data and information -          It can benefit large organizations to maintain their data in an organized manner access for desired people	·         Bandwidth issues -          Heavy users who consume a lot more bandwidth will affect other users.

GUIDED MEDIA

UNGUIDED MEDIA

·         Twisted pair cable

·         Coaxial cable

·         Fiber-optic cable

·         Infrared

·         Broadcast radio

·         Cellular radio

·         Microwave

·         Communication satellite

Advantages of network

Disadvantages of network

·         Easy communication and speed

-          People can communicate efficiently by using a network such as emails,instant messaging, telephony,etc

·         Security threats

-          There are hackers who are trying to steal valuable data of large companies for their own benefit

·         Security

-          Sensitive files and programs on a network can be password protected and can only be accessed by the authorized users.

·         Expensive to build

-          Building a network for large scale organization are very pricey especially to buy and replace cables and other hardware.

·         Ability to share files,data and information

-          It can benefit large organizations to maintain their data in an organized manner access for desired people

·         Bandwidth issues

-          Heavy users who consume a lot more bandwidth will affect other users.