Understanding Computer Networks: Latest Developments (2020)

📚 Quick Study Guide

🔍 Network Topologies: Physical or logical arrangement of nodes in a network (e.g., bus, star, ring, mesh). 🌐 OSI Model: Conceptual framework describing the functions of a networking system using seven layers: Application, Presentation, Session, Transport, Network, Data Link, and Physical. 📡 TCP/IP Model: Practical model used in the Internet, with four layers: Application, Transport, Internet, and Link. 📦 Protocols: Sets of rules governing communication between devices (e.g., HTTP, FTP, SMTP, TCP, UDP). 🛡️ Network Security: Measures to protect network infrastructure and data from unauthorized access, use, disclosure, disruption, modification, or destruction (e.g., firewalls, intrusion detection systems, VPNs). 📶 Wireless Networking: Technologies enabling communication without physical cables, such as Wi-Fi (IEEE 802.11 standards). ☁️ Cloud Networking: Network infrastructure and services delivered via the cloud, enabling scalability and flexibility. 📡 5G Technology: The fifth generation of wireless technology, offering faster speeds, lower latency, and increased capacity. 💡 SDN (Software-Defined Networking): Decouples the network control and forwarding functions, enabling programmable network management. ⚙️ Network Virtualization: Combines hardware and software network resources into a single, software-based administrative entity.

🧪 Practice Quiz

1. Which layer of the OSI model is responsible for data encryption and decryption?
   1. Application
   2. Transport
   3. Presentation
   4. Network
2. Which of the following is NOT a network topology?
   1. Star
   2. Bus
   3. Tree
   4. Cloud
3. What does TCP stand for?
   1. Transmission Control Protocol
   2. Transfer Control Protocol
   3. Transport Connection Protocol
   4. Terminal Control Protocol
4. Which protocol is commonly used for sending emails?
   1. HTTP
   2. FTP
   3. SMTP
   4. TCP
5. What is the main advantage of Software-Defined Networking (SDN)?
   1. Increased hardware costs
   2. Centralized control and programmability
   3. Decreased network speed
   4. Limited scalability
6. Which of the following is a key feature of 5G technology?
   1. Slower speeds
   2. Higher latency
   3. Increased capacity
   4. Limited range
7. What is the primary purpose of a firewall in network security?
   1. To speed up network traffic
   2. To prevent unauthorized access
   3. To encrypt data
   4. To manage network devices