WHAT IS A COMPUTER NETWORK?

-



Computer Network

- is the interconnection of 2 or more computers.

- is a digital telecommunications network which allows nodes to share resources. In computer networks, computing devices exchange data with each other using connections (data links) between nodes. These data links are established over cable media such as wires or optic cables, or wireless media such as Wi-Fi.
Advantages and Disadvantages of Networking

Computer Networks have many Advantages. Among the many benefits are:

1) Reduced Costs - Everyone in your home or office can share a single printer and a single high-speed Internet connection at the same time.

2) Increased Efficiency - You can access data, pictures, and many other files on any connected computer without having to save them into a USB flash drive or burning them in a CD.

3) Economical - Purchasing software network licenses is relatively cheaper than purchasing individual licenses.

4) More Productivity - Shared internet access means no one needs to wait to use the Internet or email. Everyone can work simultaneously.

5) Increased access to communication channels - You can communicate with others in the network using the email or an Instant Messaging (IM) software.

6) More efficient patching of software - Software updates need only be installed once.      

- A patch is a piece of software designed to fix or update the data of a computer program.


However, it also has some Disadvantages; among these are as follows:

1) Network failure - If the network fails, the users lose access to information and the ability to communicate electronically.

2) Server Error - Server faults may prevent you from using some applications, or even from accessing your computer.

3) Prone to Hacker - Your system is open to hackers, especially if it is connected to the Internet at all times.

4) Prone to Virus - Networks are vulnerable to virus attacks.

5) Location Problems - Resources, such as printers, might be located too far from your table.



Network Media Types

1.) Wired Network 

Are typically used at the network core to interconnect servers and Network Equipment.

It is more reliable over the long term, much faster, and more economical.

A Wired Network is a common type of wired configuration. Most wired networks use Ethernet cables to transfer data between connected PCs. In a small wired network, single router may be used to connect all the computers. Larger networks often involve multiple routers or switches that connect to each other.
2.) Wireless Network

     This is quickly becoming the connection option of choice as it does not require any 
cables to be set in your home or office.

           Are computer networks that are not connected by cables of any kind. The use of Wireless Network enables enterprises to avoid the costly process of introducing cables into buildings or as a connection between different equipment locations. The basis of wireless systems are radio waves, an implementation that takes place at the physical level of network structure 



Types of Network: 

1) PAN (Personal Area Network) - is a computer network used to interconnect devices centered on an individual workplace.


2) LAN (Local Area Network) - is a type of network where two to as much as hundreds of computers are connected with each other using a network sharing device known as hub or switch.



3) MAN (Metropolitan Area Network) - is a larger network than a LAN.  It involves connecting several networks together that reside within a city, town or metropolis.



4) WAN (Wide Area Network) - is simply a network consisting of interconnected LANs. It is usually dispersed over a very wide area.


SOURCES:
https://pngtree.com/freepng/computer-network-vector-material_1582376.html
computer-network-advantages-and-disadvantage 
http://www.auroratech.us/it-services/wired-wireless-networks
https://www.pinterest.ph/pin/572379433864670757/
http://www.itrelease.com/2018/07/advantages-and-disadvantages-of-personal-area-network-pan/
https://www.computer-networking-success.com/computer-lan-network.html
https://www.mbaskool.com/business-concepts/it-and-systems/13281-local-area-network-lan.html
types-of-computer-networks.html
https://www.indiamart.com/proddetail/wide-area-network-services-3075210355.html

Comments

Post a Comment

Popular posts from this blog

WHAT IS A NETWORK TOPOLOGY?

-
Image
Network Topology - refers to the layout or structure of the network in relation with the flow of data. It is the way in which the elements such as computers, printers, servers, and other computing appliances are arranged in a network. In this instance, you take note not only of the device's location, but also how it is connected to the network, the type of cables in use, and its layout. On the other hand,   Logical Topology   - depicts how information flows from one device to another within the network regardless of its physical design. Distances between nodes, physical interconnections, transmission rates, and/or signal types may differ between two networks, yet their topologies may be identical. Types of Network Topologies 1.) Linear Bus Topology - is a type of network topology in which each device is connected one after the other in a sequential chain (shown right). In this case, the bus is the network connection between the devices, a...
Read more

WHAT ARE THE DIFFERENT NETWORKING DEVICES?

-
Image
Network Devices       These are the devices that connect the end devices together to allow then to communicate. They can be in the form of switches, hubs, or concentrators, etc. The Hub       A hub is a simple device that directs data packets to all devices connected to it. Basically, a hub does nothing except provide a pathway for the electrical signals and regenerate signal before it forwards it to all connected devices.      In a hub, a message is passed along or "broadcast" to every one of its ports. It does not matter that the message is only destined for one port. The hub has no way of distinguishing which port a message should be sent to. Passing it along to every port ensures that it will reach its intended destination. This places a lot of traffic on the network and can lead to poor network response times. The Switch       Similar to hubs, switches are the connectivity point o...
Read more

WHAT IS THE DIFFERENCE BETWEEN STRAIGHT-THROUGH AND CROSSOVER CABLE?

-
Image
STRAIGHT-THROUGH VS. CROSSOVER Straight-Through      A straight through cable is a type of twisted pair cable that is used in local area networks to connect a computer to a network hub such as a router. This type of cable is also sometimes called a patch cable and is an alternative to wireless connections where one or more computers access a router through a wireless signal. On a straight through cable, the wired pins match. Straight through cable use one wiring standard: both ends use T568A wiring standard or both ends use T568B wiring standard. The following figure shows a straight through cable of which both ends are wired as the T568B standard. CROSSOVER      A crossover Ethernet cable is a type of Ethernet cable used to connect computing devices together directly. Unlike straight through cable, the RJ45 crossover cable uses two different wiring standards: one end uses the T568A wiring standard, and the other end uses the T568B wir...
Read more