Topic 3 - Networks
Question 1
SLPaper 1A school currently has a cabled network but wants to add wireless networking across the whole campus.
There are concerns that unauthorized people could access the data on the wireless network.
The school has decided to implement a virtual private network (VPN) to provide access to its network.
Describe two hardware components the school will need to implement the wireless network.
Identify two advantages to the students of the new wireless network.
Outline two methods the school could employ to prevent network data from being accessed over their wireless system.
Identify two technologies the school would require to provide a VPN.
Explain one benefit to the staff of using a VPN to remotely access the school network.
Question 2
SLPaper 1Outline the reason for compression when transmitting data.
Question 3
SLPaper 1Describe how data is transmitted by packet switching.
Question 4
HLPaper 1An oil and gas company has a networked computer system for use of their employees in the Head Office.
The company also uses the internet to enable communication with employees working on exploration and production in many remote geographical areas.
The sub-sea oil and gas exploration and production unit of the company relies on thousands of kilometres of pipeline which are monitored by a computer control system which can detect leaks.
The process of detecting leaks is carried out by sensors which are continuously monitoring changes in the flow and pressure of the liquids in the pipes.
This data is processed on a computer in the office.
If any of sensor values are outside of the acceptable parameters stored on a disk in the office, the following error routines are performed:
- an alarm is sounded on the computer at the office
- an email message is sent to managers in the Head Office.
Identify one hardware security measure that will ensure that confidential data from the Head Office cannot be accessed.
Identify one software security measure that will ensure that confidential data from the Head Office cannot be accessed.
Identify one network security measure.
Explain the environmental benefit of using a computer control system to monitor the pipeline.
Explain the relationship between sensors, output transducers and processor in this situation.
Construct a system flowchart to represent the process described above.
Question 5
SLPaper 1Define the term data packet.
Question 6
SLPaper 1Outline one reason for the use of standards in the construction of networks.
Question 7
SLPaper 1Identify two characteristics of a data packet.
Question 8
SLPaper 1Identify two characteristics of a personal area network (PAN).
Question 9
SLPaper 1A company that provides training for teachers plans to set up a training room in its offices with a network of 15 computers. Each computer has 1 TB of storage and 16 GB of random access memory (RAM).
In order to minimize costs, the company decided only to install general application software on the training computers.
The company has decided to allow the teachers to use their own devices in its training room by adding wireless networking.
Identify two characteristics of RAM.
State the purpose of persistent storage on the computers.
Identify two types of general application software that would be installed on the training computers.
Outline one advantage to the company of implementing this change.
Outline one disadvantage to the company of implementing this change.
Describe one method of security that may be used on this wireless network.
Explain why the speed of data transmission on the wireless network in the training room may vary.
Question 10
SLPaper 1Outline one reason why protocols are used in communications between computers.
