1.3.3 Network Design Quiz: OCR A Level Computer Science Networks Questions

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Questions and Answers

What is the main purpose of network protocols and standards?

To increase the speed of data transmission

To make networks more secure

To reduce the cost of building a network

To ensure different devices can communicate with each other (correct)

Which type of network is typically spread over a large geographical area?

Mesh topology

Wide Area Network (WAN) (correct)

Bus topology

Local Area Network (LAN)

In a client-server network, which device typically initiates the request for data or services?

The server

Neither the client nor the server

The client (correct)

Both the client and server

Which layer of the TCP/IP stack is responsible for ensuring reliable data transfer?

Transport layer Signup and view all the answers

In a peer-to-peer network, which of the following is true?

Each device acts as both a client and a server Signup and view all the answers

Which network topology shows the physical layout of the wires and components that make up the network?

Physical topology Signup and view all the answers

What is the primary purpose of the Transport Layer in the TCP/IP stack?

To establish end-to-end connection between the source and destination computers Signup and view all the answers

Which of the following is the key difference between a LAN and a WAN?

LANs are spread over a small geographical area, while WANs are spread over a large geographical area Signup and view all the answers

What is the primary role of the Network Layer in the TCP/IP stack?

To add the source and destination IP addresses Signup and view all the answers

Which of the following statements about the Application Layer in the TCP/IP stack is correct?

The Application Layer specifies the protocol that needs to be used for the application Signup and view all the answers

Which of the following is a key advantage of using standardized protocols like TCP/IP?

It allows devices from different manufacturers to communicate with each other Signup and view all the answers

Which of the following is a key characteristic of a client-server network architecture?

One or more devices act as servers, providing resources to client devices Signup and view all the answers

Which of the following is a disadvantage of the star topology?

If the central switch fails, the rest of the network fails. Signup and view all the answers

What is an advantage of the mesh topology?

Nodes are automatically incorporated into the network. Signup and view all the answers

Which of the following is a protocol used for email access?

POP3 or IMAP Signup and view all the answers

What is the primary purpose of protocols in computer networks?

To define the rules for communication between devices. Signup and view all the answers

Which of the following best describes a client-server network?

A network where some nodes act as servers, providing resources to client nodes. Signup and view all the answers

What is the difference between a LAN and a WAN?

A LAN is a local area network, while a WAN is a wide area network. Signup and view all the answers

Study Notes

Network Topologies

Star Topology: expensive due to switch and cabling; if the central switch fails, the entire network fails
Mesh Topology: no cabling cost if wireless; reliability and speed improve with node increase; no central switch improves speed; but devices with wireless capability are expensive, and maintaining the network is difficult

Protocols

A protocol is a set of rules defining how computers communicate with each other
Examples of commonly used protocols: HTTP, TCP/IP, POP3, IMAP, and FTP
Protocols are standard, allowing devices to communicate regardless of manufacturer

The Internet Structure

The Internet is a network of networks allowing global communication
The Internet Structure includes: TCP/IP stack, protocol layering, LANs and WANs, and DNS

Characteristics of a Network

A network is two or more computers connected together, transmitting data between each other
There are two main types of networks: Local Area Networks (LANs) and Wide Area Networks (WANs)
LANs cover a small geographical area or a single site, while WANs cover a large geographical area

Network Types and Topology

Physical topology refers to the physical layout of wires and components
Logical topology refers to the layout showing how data flows
Examples of physical topology: bus, star, and mesh

Bus Topology

All terminals are connected to a backbone cable, with ends plugged into a terminator
Continents are connected using large international backbone cables

The TCP/IP Stack and Protocol Layering

TCP/IP is a stack of networking protocols working together, passing packets during communication
The TCP/IP stack consists of: Application Layer, Transport Layer, Network Layer, and Link Layer

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Description

Test your knowledge on Characteristics of a Network, Importance of Protocols and Standards, The internet Structure including TCP/IP stack, Protocol Layering, LANs and WANs, DNS, Packet and Circuit Switching, Client-server and Peer-to-peer concepts.