WHAT IS A COMPUTER NETWORK?

-is a collection of two or more computers, as well as other related devices, connected together so that information can be exchanged between or among them.

Advantages and Disadvantages of Networking

          A.    ADVANTAGES

                                                                         Reduced costs
-everyone in your home or office can share a single printer and a single high speed internet connection at the same time.


                          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.
Economical

            -purchasing software network licenses is relatively cheaper than purchasing individual licenses.

More Productive


                 -shared internet acccess means no one needs to wait to use the internet or email.




                                            Increased Access to Communication Channels
                  -you can communicate with others in the network using the email or an Instant Messaging (IM) software.

   

   
                             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.





B.  DISADVANTAGES

                                                                                        Network Failure


-Some of the organization’s activities depend on the network ti be up and running, if the network fails, the users lose access to information and the ability to communicate electronically.
   Server Error

 -in a server/client relationship network, server faults may prevent you from using some applications, or even from accessing your computer.



                                                                          

          Prone to Hackers


            -your system is open to hackers, especially if it is connected to the internet at all.





                           


                                                                Prone to Virus
-networks are vulnerable to virus attacks. A virus introduced in one workstation can spread quickly to other workstations.

                                               
                         Distance/Location Problem


             -Resources, such as printers, might be located too far from your table.



          NETWORK MEDIA TYPES
       Wired Network
- are used to interconnect servers and networks.





           Wireless Network
- This is quickly becoming the connection option of choice.

                                                                            Types of Network
              PAN(Around person) - Is a computer used to interconnect devices centered on an individual workplace.

    LAN(Room, Building, Campus) - Is a type of network where two to as much as hudreds of computers are connected with each other using a network sharing device known as a hub or switch to enable sharing of files, printers, and other resources.

    MAN(City) - Is a larger network than the LAN.

    WAN(Country, Continent) - Is simply a network consisting of interconnected LANs.



Comments

Post a Comment

Popular posts from this blog

HOW TO BE A RESPONSIBLE NETIZEN?

Image
What is a netizen?    A netizen is someone who uses the internet. most of these people who we call netizens are millenials or generation y,but,by simply searching something using the internet you have simply become a netizen .There are also responsibilities you have as a netizen because the internet is a powerful weapon or tool that can be used against another netizen. Tips to be a good netizen: Never give personal information such as your name, address, phone number, password, or financial information to someone you meet over the Internet Never reply to email or text messages that are inappropriate and threatening, or make you feel uncomfortable Report to your parents, teachers, or authorities any email with inappropriate contents that make you feel uncomfortable Never agree to meet with someone you know from the Internet Be careful when someone offers you something for free over the Internet Use websites of established and trusted institutions or com...
Read more

WHAT ARE THE TYPES OF CABLE?

Image
WHAT ARE THE TYPES OF CABLE?+ Cables are classified into 5 types depending upon their purpose as follows: Ribbon Electric Cables It consists of multiple insulated wires running parallel with one another and are used for transmission of multiple data simultaneously. For example, this is used to connect the CPU with the motherboard and are generally used for interconnection of networking devices. Shielded Cables It consists of 1 or 2 insulated wires which are covered by a woven braided shield or aluminium Mylar foil for better signal transmission and removing irregularities in the frequency of power and external interference in radio. These cables transmit high voltage electric current and are protected by a shield. Twisted Pair Cables It has two or more insulated copper wires which are twisted with each other and are colour-coded. These types of wires are usually used in telephone cables and the resistance to external interference...
Read more

WHAT ARE THE DIFFERENT NETWORKING DEVICES?

Image
What are the different networking devices? 1.Firewall -  A firewall is a network security  device that monitors incoming and outgoing network traffic and permits or blocks data packets  based on a set of security rules. Its purpose is to establish a barrier between your internal network and incoming traffic from external sources (such as the internet) in order to block malicious traffic like viruses and hackers. 2. Hub  –  A hub is basically a multiport repeater. A hub connects multiple wires coming from different branches, for example, the connector in star topology which connects different stations. Hubs cannot filter data, so data packets are sent to all connected devices.  In other words, collision domain of all hosts connected through Hub remains one.  Also, they do not have intelligence to find out best path for data packets which leads to inefficiencies and wastage. Types of Hub Active Hub:-  These are the hubs...
Read more