Raid in content area 5

Question 1

How does RAID 1 work and what is its primary function?

Answer 1

RAID 1, also known as disk mirroring, consists of two identical sets of disks where data is stored identically for redundancy. If one drive fails, the system can still operate using the other drive.

RAID 1 duplicates data across two drives to ensure redundancy. It provides fault tolerance by creating an exact copy of the data on each drive. This redundancy allows for continued operation even if one drive fails, enhancing data protection and system reliability.

Question 2

Explain the concept of middleware in the context of software.

Answer 2

Middleware is software that acts as an intermediary layer between different applications or systems, facilitating communication and data management.

Middleware plays a crucial role in software development by enabling seamless integration of diverse systems. It enhances interoperability, scalability, and flexibility by abstracting complexities and standardizing communication protocols. This abstraction layer simplifies development and maintenance processes.

Question 3

Describe the drawbacks of implementing new software in a business environment.

Answer 3

One drawback could be the cost needed to upgrade current digital systems to support the new software, which may pose a financial challenge for the business.

Question 4

Describe RAID 5

Answer 4

RAID 5 contains at least three drives with data striped across them and parity bits written across each drive. It can withstand one disk failure and has increased performance due to data striping.

Question 5

Define data striping

Answer 5

Data striping is the technique of storing consecutive segments of data on different physical storage devices.

Question 6

How does RAID 10 work?

Answer 6

RAID 10 is a combination of disk mirroring and striping, requiring at least four drives. It divides the disks into two sets of two, providing data redundancy and increased read/write performance.

Question 7

Do you need a hardware controller for RAID 5?

Answer 7

Yes, RAID 5 usually has its own hardware controller.

Question 8

Describe the rebuild time in RAID 10 after a disk failure

Answer 8

The rebuild time in RAID 10 is reduced in the event of a disk failure as long as there is a mirror image still available.

Question 9

Define parity in storage systems

Answer 9

Parity is a technique that checks for lost or overwritten data when moving it between storage places or transmitting it between computers.

Question 10

Describe the purpose of a Storage Area Network (SAN).

Answer 10

A SAN is a network of interconnected storage devices used to store, manage, and protect data. It uses block storage where data is broken down into blocks and stored separately.

Question 11

Define RAID 1 and provide one benefit and one drawback.

Answer 11

RAID 1 is a data storage technique that involves mirroring data across multiple drives for redundancy. One benefit is data redundancy for increased reliability, while a drawback is lower storage efficiency compared to other RAID levels.

Question 12

Describe the purpose of a Storage Area Network (SAN).

Answer 12

A SAN is a network of interconnected storage devices used to store, manage, and protect data. It uses block storage where data is broken down into blocks and stored separately.RAID 1 is a data storage technique that involves mirroring data across multiple drives for redundancy. One benefit is data redundancy for increased reliability, while a drawback is lower storage efficiency compared to other RAID levels.

Question 13

How does a NAS (Network Attached Storage) system work in terms of data access and storage?

Answer 13

NAS systems provide centralized storage that can be accessed over a network. Data is stored on disks within the NAS device and can be accessed by users connected to the network.

Question 13

Define RAID 1 and provide one benefit and one drawback.

Answer 13

RAID 1 is a data storage technique that involves mirroring data across multiple drives for redundancy. One benefit is data redundancy for increased reliability, while a drawback is lower storage efficiency compared to other RAID levels.

Question 14

Do SANs use block storage or file storage for data organization?

Answer 14

SANs use block storage where data is broken down into blocks and stored separately, unlike traditional file storage systems.

Question 15

Describe the benefits of using fibre optic cabling in a SAN network.

Answer 15

Fibre optic cabling in a SAN network provides faster data transmission speeds compared to other cabling types, and it uses a protocol known as fibre channel for better performance.

Question 16

Explain the importance of regularly maintaining and updating systems connected to a network.

Answer 16

Regular maintenance and updates are crucial for ensuring security and optimal performance of systems connected to a network. This helps in preventing vulnerabilities and ensuring smooth operation.

Question 17

Describe the benefits of a server-based network.

Answer 17

Reliability through central data storage, easier setup and maintenance with powerful servers, and global accessibility of resources

Question 18

What are the drawbacks of a server-based network?

Answer 18

Risk of network failure if main server fails, high initial implementation costs, complex maintenance requiring skilled specialists, and security vulnerabilities.

Question 19

How does a WAN network enhance accessibility for users?

Answer 19

By providing access to resources globally, allowing users to connect from anywhere in the world without delays in data transfer.

Question 20

Define wireless connection methods in networking.

Answer 20

Wireless connection allows devices to connect to networks or the internet without physical cables, using access points connected to routers or switches

Question 21

What are the features of wireless connection methods?

Answer 21

They eliminate the need for physical cabling, utilize access points for connectivity, and distribute Wi-Fi signals for device connection.

Question 22

Describe the benefits of managing software centrally in a server-based network.

Answer 22

Eliminates the need to install software on individual devices, allows for easy upgrades and updates, and ensures all connected devices have access to the software.

Question 23

Describe Network management systems in the context of digital production, design, and development.

Answer 23

Network management systems enable network managers to monitor, maintain, and optimize the network through a single application designed for network management.

Question 24

Define Role Based Access Control (RBAC) and its purpose in network management.

Answer 24

RBAC is a system that restricts system access by assigning specific roles to users and devices, setting permissions and privileges accordingly.

Question 25

How does Mobile Device Management benefit network managers and their teams?

Answer 25

Mobile Device Management software helps secure, monitor, and manage mobile devices accessing the network, even with multiple service providers and operating systems.

Question 26

Do wireless networks offer any advantages over wired networks in terms of installation and updates?

Answer 26

Wireless networks allow quicker installation without additional cabling, and devices can be easily updated via software updates.

Question 27

Describe the potential security drawbacks of a BYOD policy in an organization.

Answer 27

A BYOD policy can lead to security issues like unauthorized access, virus transfer, and lack of central control over infected devices.

Question 28

How can interference from other wireless networks impact the performance of a wireless network?

Answer 28

Interference from other wireless networks in proximity can disrupt the performance of a wireless network, affecting connectivity and data transmission.

Question 29

Describe the benefits of wired connection methods.

Answer 29

Wired networks offer stronger security, reliability, and stability compared to wireless networks.

Question 30

What are the drawbacks of wired connection methods

Answer 30

Drawbacks include-consuming installation, limited mobility, and the need for physical access via cables.

Question 31

Define the three types of networks mentioned in the content.

Answer 31

The three types are Local Area Network (LAN), Wide Area Network (WAN), and Personal Area Network (PAN), each with wired and wireless connectivity options.

Question 32

How do wired networks differ from wireless networks in terms of reliability?

Answer 32

Wired networks are often more reliable and stable due to physical connections, reducing interference and ensuring robustness.

Question 33

Do wired networks require more maintenance as they scale up?

Answer 33

Yes, larger networks with more devices may require additional servers and maintenance to manage increased capacity.

Question 34

Describe a scenario where wired networks outperform wireless networks.

Answer 34

Wired networks excel in areas with ‘black spots’ or obstacles that hinder wireless signals, ensuring constant connectivity via physical cables.

Question 35

Describe Personal Area Networks (PAN)

Answer 35

PANs are very small networks within a building used by an individual or small business, created using Ethernet cables, USB, or Wirefire, with limited distance accessibility.

Question 36

Do Wireless Personal Area Networks (WPAN) use Bluetooth technology or WiFi?

Answer 36

Yes, WPANs are the wireless versions of PANs and utilize Bluetooth technology or WiFi.

Question 37

Define Bandwidth

Answer 37

Bandwidth is the measurement of data transfer capacity over a network in a specific time period, determining how much data can be sent and received.

Question 38

How does bandwidth differ from network speed?

Answer 38

Bandwidth refers to data capacity, while speed is the rate at which data is sent across a network. Bandwidth is the volume available for the speed.

Question 39

Describe the difference between symmetrical and asymmetrical bandwidths.

Answer 39

Symmetrical bandwidth allows equal data transmission in both directions, while asymmetrical bandwidth has a smaller upload capacity compared to download capacity.

Question 40

Identify the type of network that uses mobile phone signals from specific service providers.

Answer 40

Identify the type of network that uses mobile phone signals from specific service providers.
Cellular networks are designed to provide mobile communication through a system of interconnected base stations. These networks use mobile phone signals to allow users to make calls, send texts, and access data services. They are structured in a way that divides geographic regions into cells served by individual base stations, ensuring seamless connectivity as users move between cells.

Question 41

Describe the client-server network model illustrated in the content.

Answer 41

The client-server network model involves clients accessing services/resources on a central server, requiring authorized access with usernames and passwords. Clients are centrally controlled, making device management easier, but a server failure can disrupt all connected clients.

Question 42

What is a thin client and how does it differ from a standard computer?

Answer 42

A thin client accesses resources on a central server, lacks local storage like hard drives, and runs a ‘thinned’ version of the operating system. Data processing is mainly done on application servers, reducing costs and simplifying upgrades and security management.

Question 43

Define propagation delay in the context of networking.

Answer 43

Propagation delay refers to the time it takes for data packets to travel from a device (e.g., laptop) to the server in a network.

Question 44

How does network congestion affect the performance of a client-server network model?

Answer 44

Network congestion in a client-server model with many clients can slow down the system due to increased traffic, potentially causing bottlenecks and latency issues.

Question 45

Explain the concept of scalability in the context of thin clients.

Answer 45

Scalability in thin clients refers to the ease of increasing the system size by adding more thin clients recognized by the central server, allowing for efficient network expansion.

Question 46

Describe the difference between physical and logical network topologies.

Answer 46

Physical topology refers to the layout of devices on a network, while logical topology pertains to how data moves through the network regardless of physical connections.

Question 46

What are the key characteristics of a thin client compared to a standard computer?

Answer 46

Thin clients lack local storage, run a simplified OS, access resources from a central server, have lower costs, and restrict data saving and software installation capabilities.

Question 47

Define a star network topology and its central device.

Answer 47

A star network topology involves connecting each device to a central device (hub, switch, or concentrator) using point-to-point links. The central device manages and controls network functions.

Question 48

How does a peer-to-peer network model differ from a client-server network model?

Answer 48

In a peer-to-peer network, there is no central server, and each computer system acts as both a client and a server, allowing users to share resources. This contrasts with client-server networks where a central server provides resources.

Question 49

Do star topologies offer any advantages? If so, list some.

Answer 49

Yes, star topologies are easy to install, wire, and reconfigure. They allow for no disruption when connecting or removing nodes, are easy to troubleshoot, and enable easy isolation of faulty equipment.

Question 50

Describe the concept of a thin client network model.

Answer 50

In a thin client network model, multiple devices (thin clients) rely on a central server for processing and storage, reducing the workload on individual devices and simplifying maintenance and updates.

Question 51

Explain why peer-to-peer networks are cost-effective and easily scalable.

Answer 51

Peer-to-peer networks are cost-effective because they do not require a central server, reducing additional costs. They are easily scalable as adding a new computer to the network is straightforward without the need for a separate server.

Question 52

Describe a tree topology in networking.

Answer 52

A tree topology is a combination of star and bus topologies where star-configured nodes are connected to a linear bus backbone cable.

Question 53

What are the advantages of tree topologies?

Answer 53

Advantages include point-to-point wiring for segments, support for network expansion, reconfiguration flexibility, isolated node failures, and hierarchical data arrangement.

Question 54

How does a mesh topology differ from other network topologies?

Answer 54

A mesh topology requires every device to have a point-to-point connection with every other device, providing robustness and dedicated links for secure data transmission.

Question 55

Define backbone cable in networking.

Answer 55

Backbone cable is the part of a network that integrates different networks into a single complete network, carrying the majority of network traffic.

Question 56

Describe a bus topology in networking.

Answer 56

In a bus topology, all nodes are connected directly to a central cable (backbone) where data is sent up and down the network.

Question 57

What are the disadvantages of star topologies?

Answer 57

Disadvantages include network failure if the hub fails, increased cabling requirements, and higher costs mainly due to the hub expense.

Question 58

What are the disadvantages of star topologies?

Answer 58

Disadvantages include network failure if the hub fails, increased cabling requirements, and higher costs mainly due to the hub expense.

Question 59

Describe the purpose of a VLAN (Virtual Local Area Network).

Answer 59

A VLAN is used to logically separate networks, such as different departments or geographical areas within a business, to increase efficiency, save on network resources, and enhance security.

Question 60

Do VLANs help in reducing latency? If yes, how?

Answer 60

Yes, VLANs help reduce latency by transmitting data packets around a smaller network area, leading to faster data transmission.

Question 61

Define the advantages of implementing VLANs in a network setup.

Answer 61

Advantages of VLANs include enhanced security control, decreased latency, scalability, and easier troubleshooting on smaller networks.