Chapter A2 · 10 available objectives
Networks
Infrastructure, devices, protocols, architecture, and transmission.
Describe the purpose and characteristics of networks
Local Area Network (LAN) connects network devices over a short distance LANs are designed to operate distances not exceeding approximately 1km longer…
4 minA2.1.2Describe the purpose, benefits and limitations of modern digital infrastructures
Digital infrastructure refers to the physical and virtual components that support the operation and flow of digital data. It forms the foundation for…
5 minA2.1.3Describe the function of network devices
Gateways Gateways are network devices that act as a bridge between two networks that use disparate protocol. A device that connects two different networks…
6 minA2.1.4Describe the network protocols used for transport and application
Transmission Control Protocol (TCP) is a core protocol of the internet it operates at the transport layer(3rd layer) of the TCP/IP model TCP/IP Model:…
6 minA2.1.5Describes the function of the TCP/IP Model
Why TCP/IP Model? 网络非常复杂（devices + protocols + media） 使用模型来： 理解（understanding） 标准化（standardizing） 故障排查（troubleshooting） TCP/IP model has four different…
4 minA2.2.1Describe the functions and practical applications of network topologies
Network topology is the arrangement of devices ( nodes ) and connections ( links ) in a network. Topology can be: physical topology the actual arrangement…
5 minA2.2.2Describe the function of servers
A server is a computer system, or software running on a computer, that provides data, resources, or services to other computers on a network. The computers…
5 minA2.2.3Compare and contrast networking models
A centralized model where a server hosts and manages resources, and a client makes requests. Communication follows a request/response pattern; the server…
2 minA2.2.4Explain the concepts and applications of network segmentation
Dividing a network into smaller, isolated subnetworks (segments) to improve performance and security . Traffic is confined within segments — it cannot cross…
3 minA2.3.1Describe different types of IP addressing
IP facilitates the routing and delivery of data packets across networks. Every device on a network is assigned a unique IP address as its numerical…
3 min