Task 1 Home Office (50 marks) A) Explain, giving three reasons (each reason a paragraph in length), why the home office would not use a client-server network? -The three reasons why the home office would not use a client server network, because there are no servers in this network. Servers play a very important role in a client network since it is equipped with the hardware and software for people to share documents other sorts of files through it. Other reason for not using client network is because the home office is two small and only got 2 or 3 computers with no intention to maximize it there is no point of using a client network. Using that network would also slow down the speed of the networking system. Third reason why the client /server network should not be chosen as the network system is because of that it would add additional cost and the effort would be useless if a certain virus or some malicious software connects into the network system and infects all computers at the home office.

B) Discuss the functions of the switch and the modem as used in the home office network. (Each device a paragraph). Switch- A switch can increase the number of peripherals used in your network or allow you to add computers to your network. It's an affordable and easy way to expand your network. Switch is also a telecommunication device that receives a message from any device connected to it and then transmits the message only to the device from which the message was received. Modem- Modems are hardware devices that translate an analog signal into a language your computer or digital device can understand and are often used to create an Internet connection through telephone (dial-up) or cable lines. Wireless modems are typically used in portable devices such as laptop computers, mobile phones, and PDAs. These modems receive a signal over the air, such as from a cellular network, and not from a physical ground line.

C) One of the purposes of the home office is to enable you (the owner) to practise telecommuting. In your own words, describe telecommuting and list three benefits of telecommuting. Telecommuting means to work at home using a computer connected to the network of one’s employers. It basically means working from a remote location (often one’s home) using all the devices and machines required instead of commuting via automobile or other mode of transportation to and forth from an employees work site.
The benefits of telecommuting are -Helps conserve energy, use of fuels and gas are minimized. -Helps to improve people’s ability to keep in touch with family and friends. - Has changed the way people work, improving work conditions and public safety.

D) Users in the home office will be sharing a flat-file database program, which permanently reside on the laptop. 1) In your own words, what is a flat-file database program? - Flat-file database is a database system in which each database is contained in a single table. This database stores data in a single table. They are generally in plain text form, in which each line only holds one record. It is different to relational database which uses multiple tables to store data’s. In this each line hold one record which is separated by commas and tabs. 2) Give one advantage and one disadvantages of a flat-file database program. - Flat-file database are easier to understand and implement, less skills are required to handle such kind of databases and it has less hardware and software requirements. But this flat-file database being just a single table which holds one record it is easier for hackers to extract information’s, security threats are in big numbers. 3) Give an example of a commonly used flat-file database program, apart from Excel. - Microsoft access is an example of flat-file database apart from Excel.

Task 2 Main office (100 marks)

A) Explain, giving three reasons, why the main office would use a client-server network? - A computer network in which one principal, powerful computer (called the server) is a heart to which many less powerful personal computers, printer, workstations (called clients) are connected. Client-server network is made up of one or more file servers and any type of computer. It requires a Network Operating system in addition to the Operating system on the client’s computer. First reason is that there is no limit in the number of users who can use the network. In Main office, there will probably be more than 10 users using the network such as 8 PC, 2 laptops and 2 tablets. Client-server network is made up of one or more file servers such as 2 centralized servers, and any other types of computer such as clients.
Second reason is that it will not slow down if there is any heavy use, even though it needs a number of servers for different task. In addition, the security in client-server network for is stronger compare to Peer to peer network.
Third reason for the use of client-server network in main office is that the main computer in a client-server network can act as a centralized hub for storing and sharing files. One can access files of another computer and can make changes in the document or even share it without making use of the particular computer.

B) In order to access information outside of the main network a router will be required. Discuss two functions of a router in relation to your network. - A router connects network from all users in the building and also makes sure that data is sent to the right destination. It decides where the information should be sent from one computer to another. Router is a specialised computer/device that sends messages and receives .It controls every Internet user moving to their destinations along thousands of pathways
C) Your company runs an e-commerce website. The main office will house a dedicated server that holds the website and all associated files. Answer the following questions regarding the company website: I) Your Company runs B2C type of website to serve your customers. Describe three features of this type of e-commerce website. -. The basic feature of the B2C e- commerce is to use internet as a modem for the supply of products and services for the consumers. II) Your company is named after your name. Using your last name as the domain name for your company’s website, provide the URL for your website. Identify the domain name and the top level domain (include appropriate generic and country-code portions). -http://www.rajvaidya.com.au
Top Level Domain
Top Level Domain
Domain name
Domain name

D) You will be providing an SSL certificate for your website. Discuss its purposes, how you get one and how it works -SSL or Secure Socket layer is the protocol that provides session encryption and integrity for packets sent from one computer to another. SSl are used to protect sensitive information that passes over the wire so that users with malicious content cannot hack out the information. Using SSL, clients can use certificates to provide proof of their identity before establishing a secure connection to protect their website .

E) Describe Dos attack –its purpose, how it works, where it comes from and how it can affect your website. - Denial of service (DoS) attack is a form of network sabotage, where an attacker sends useless data packets to a network or web server in order to crash the system or hack the system. In this the attackers try to damage as much as computers as possible. The hackers form a network call eth botnet. Bot programs use the Internet to turn hacked computers into ones they control and then it connects those computers to controllers and control servers are under the direction of Botnet controllers. The commands are then sent to the first computers which later send commands to the hacked computes which execute the Commands.

F) Computer security risks are increased by using wireless because transmissions occur over shard airwaves instead of dedicated lines. Explain two important security options that should implement on your main office wireless LAN. - Wi-Fi Protected Access (WPA), and Virtual Private Networking (VPN) are the two important security options that I would implement no my main office wireless LAN. Wi-Fi protected access provides data protection, privacy and data reliability. Virtual Private Networking (VPN) provides protection against people from spying and allows access from trusted unit exclusively. This type of network can only be accessed to certain passwords and other encryption code stuff. WPA has great security option such as advanced encryption Standard that will protect the company system from casual hackers. So I would choose these two security options
G) Users in the main office will be sharing a relational database stored on a dedicated database server. I) Explain what is relational database? - Relational database is the kind of database that stores data in the form of tables. In this database, the data can be stored and processed at the same time. Compared to flat-file database they store data‘s in multiple tables. II) Discuss three advantages of relational database system over a flat-file database program. -It is better at enforcing data security compared to flat-file databases. The data’s that are stored are sensitive and multiple in number compared to one single table and record stored in flat-file database. - It is better at data maintenance. It can both add and delete data to an existing data. IT can modify an existing data. It can also remove/ delete data, but once deleted the process cannot be reversed. - The data’s that exist can also be shared compared to ones in flat-file database which can’t be shared.

Task 3 Home Office LAN to Main Office LAN network diagram (50 marks)

HOME OFFICE

HOME OFFICE

Netgear Modem
Netgear Modem iPad 2

iPad 2

Mac book pro
Mac book pro iPad 2

iPad 2

Centralized Server
Centralized Server
INTERNET
INTERNET
HP Laser Printer
HP Laser Printer
Canon - Inkjet Printer
Canon - Inkjet Printer iMac iMac

iMac iMac MAIN OFFICE

MAIN OFFICE

It share files without a file server. It is easy to set up without an expert in Networking.
It share files without a file server. It is easy to set up without an expert in Networking.
Canon Inkjet Printer
Canon Inkjet Printer iMac

iMac

INTERNET
INTERNET
Mac book pro

Mac book pro

iMac

iMac