Paper 1 Network connectivity Flashcards
Identify the type of network described below:
A network used to connect computers and devices together on a single site, such as a school.
LAN - “Local Area Network”- LANs are typically confined within a small area—usually one building, but that’s not a firm requirement. That area might be your home or small business, and it could contain just a few devices. It might also be a much larger area, like an entire office building that contains hundreds or thousands of devices.
Identify the type of network described below:
A network that has a centralized computer which sends data to computers that request it.
Client-server - The client-server model is the relationship between two computers in which one, the client, makes a service request from another, the server. The key point about a client-server model is that the client is dependent on the server to provide and manage the information.
Identify the type of network described below:
A network where, if any computer fails, communication is not likely to be affected.
In a star network each device on the network has its own cable that connects to a switch or hub. So if a computer does fail then the rest of the network will not.
Identify how wireless network signals are measured.
Signal strength is measured in dBm or decibel milliwatts.
Identify a common frequency that a wireless network can operate in.
Wi-Fi signals use radio frequencies in the 2.4 gigahertz (GHz) and 5 GHz wavebands.
Give one reason why wireless networks should not use any frequency or channel.
The reason that certain channels aren’t the best choice to use is because they have interference. There are a couple different ways this interference is caused:
Co-Channel interference results when there are numerous devices all competing for time to talk on the same channel. Adjacent-Channel interference occurs when devices from overlapping channels are trying to talk over each other.
What is the purpose of an IP (Internet Protocol) address?
IP addresses are the identifier that allows information to be sent between devices on a network: they contain location information and make devices accessible for communication.
Explain the fundamental reason for moving from IP version 4 to IP version 6.
The Internet Protocol version 6 (IPv6) is more advanced and has better features compared to IPv4. It has the capability to provide an infinite number of addresses. It is replacing IPv4 to accommodate the growing number of networks worldwide and help solve the IP address exhaustion problem. Capable of Addresses: 4.3 billion
Identify and explain two issues that could affect performance of a wireless network.
Factors that affect the performance of networks:
- the number of devices on the network.
- the bandwidth of the transmission medium.
- the type of network traffic.
- network latency.
- the number of transmission error
What are the advantages and disadvantages of using cloud computing?
Advantages of Cloud Computing:
- Back-up and restore data
- Improved collaboration
- Excellent accessibility
- Low maintenance cost
- Mobility
- Unlimited storage capacity
- Security
Disadvantages of Cloud Computing:
- Internet Connectivity
- Vendor lock-in
- Limited Control
- Security
