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information_systems.docx1. What are the basic principles that apply to all networks?
The basic principles that apply to all networks include:
Security architecture- this is a principle that describes the security services that any computer system is required to have in order to meet the needs of the users.
Least privilege principle- by using this principle it ensures that in case an employee changes a job functions, verification of the installed applications is done to verify that the employees are required for the new job functions.
Another principle of all networks is the way data is represented, different computers using different CPUs represent their data differently but all having the same information.
2. What is an Ethernet card?
A network card is a device that computers can be used for computers to talk to each other in a different parts of a network in order to transmit data over a wire or it can do so wirelessly. They can also be defined as a kind of a computer adapter that support Ethernet standards for high-speed connections.
3. What does a network switch do?
A network switch is used to connect multiple personal computers, printers, servers and other hardware devices. Switches are also used to allow one to send information lie emails and accessing of shared information’s.
4. What is a bandwidth?
A bandwidth is a range that occurs in a given frequencies that is used to transmit a signal. Is usually a synonym for data transfer rate that is the amount of data that can be carried from one place to another?
5. What do you need to have a dial-up connection to the internet?
A dial-up connection uses a phone line in connecting to a server or a smart hub. One needs to use a dial-up connections because it is associated with low costs when connecting to the internet. Is also used because it is a safe way to connect to the internet because it rotates the IP address. It is also readily available because it gives a user a convenience of using ones account.
6. How is a DSL interconnection different from telephone modem connection?
A DSL modem delivers high speed connections within a short distance. The modem uses special coding techniques that enable it to get maximum throughput from a low bandwidth. A DSL has advantages like it reduces costs and increases the speed of the network. A telephone modem connection allows connections between devices like mobile and they transmit data from one device to another.
7. What impacts does frame relay have on a metropolitan area network?
Frame relay implements data switching techniques on a metropolitan area network. Data frames are also send across circuits either permanent or switched this are defined within a network frame switch.
8. What is a cat 5 cable used for?
Cat 5 cable has very many uses among them is wiring of premises, this is done when one wants to set up a local network and he/she has to provide connections in all the rooms. They are also used in connecting computers to the wall plate after connecting to the network.
9. What is a Bluetooth?
A Bluetooth is a standard for a short range wireless interconnection where electronic devices like computers and cell phones. Bluetooth allows this devices wirelessly. It can also been defines as a standard that allows devices to communicate and exchange data over a short distance.
10. What does a Wi-Fi do?
Wi-Fi is a mode of internet connection and for one to access such kind of a network one has to have a wireless adapter that is installed in their computers. Wireless 2.4 GHz to 5GHz. Wi-Fi make use of radio waves in transmitting information across a network. An adapter in a computer will then be used to translate the data into a radio signal.
11. How does a VPN protect confidentiality?
A virtual private network prevents disclosure of privatized information, it does this by allowing only authenticated remote accessing to the network and using of encryption techniques in ensuring protection of information. A VPN ensures confidentiality by encrypting information so that even if the traffic is sniffed at the packet level, the attacker will only see encrypted data.
12. What are the four principles of computer security?
The four principles of computer include:
Examining the risks that are involved in computing to give a better chance to prevent them. The second principle is considering the available counter measures or the controls in the sector of computer security. The third principle is stimulation of thoughts about uncovered vulnerabilities in the network sector. Lastly a good thing to do is to identify the areas where more network will be needed and providing the best measures in those areas in the process of preventing threats attacks.
