CURSO de REDES 2020 para PRINCIPIANTES # 2 📡 TOPOLOGÍAS

Summary

In this video, the presenter covers the basics of network topologies, explaining how devices connect in different network structures. Topics include bus, ring, star, extended star, mesh, and hierarchical topologies, each with their pros and cons. The video also delves into network classifications, differentiating between LAN (Local Area Network), WAN (Wide Area Network), and VPN (Virtual Private Network). It provides insights into how these networks operate, the importance of connectivity, and the role of third-party services in maintaining these networks. The content is aimed at helping users understand the fundamentals of network design and management.

Takeaways

• 😀 A topology defines how devices in a network are interconnected both physically and logically.
• 😀 Bus topology involves connecting all computers to a single cable, but if the cable fails, the network stops working.
• 😀 Ring topology connects devices in a circular manner, allowing the network to continue functioning even if a node or cable fails.
• 😀 Star topology connects all devices to a central switch; if the switch fails, the entire network is disrupted, but individual node failures don't affect the rest of the network.
• 😀 Extended Star topology connects several star topologies together, offering a scalable and reliable structure.
• 😀 Mesh topology connects each device to every other device, but it's not scalable because adding new devices requires connecting to all existing devices.
• 😀 Hierarchical topology involves a primary device linking to secondary devices, commonly used in larger networks for better organization.
• 😀 LAN (Local Area Network) allows for private, limited-area networks with high bandwidth, often found in homes and small businesses.
• 😀 WAN (Wide Area Network) connects multiple LANs across large distances, sometimes spanning countries, and typically requires third-party service providers.
• 😀 VPN (Virtual Private Network) offers secure connectivity over the internet, reducing costs and encrypting data to ensure safe transmission.
• 😀 Bandwidth is limited by the technology and medium used in the network and is associated with a cost, which businesses need to account for when designing networks.

Q & A

What is network topology?

Network topology refers to the physical or logical layout of how devices are interconnected in a network. It can involve both the physical connections and how the devices logically interact with each other.

What are the main types of network topologies mentioned in the script?

The main types of network topologies mentioned are bus, ring, star, extended star, mesh, and hierarchical.

How does bus topology work, and what is its major disadvantage?

In bus topology, each device is connected to a single cable. The major disadvantage is that if the cable breaks, the entire network stops functioning.

What is ring topology and why is it no longer commonly used?

In ring topology, each device is connected to its adjacent devices in a circle. This setup was once used, but it is not popular today due to its limitations and the fact that it’s vulnerable if one connection fails.

What are the advantages and disadvantages of star topology?

Star topology connects all devices to a central hub (such as a switch). The advantage is that if one device fails, only that device is affected, while the network remains operational. The disadvantage is that if the central hub fails, the entire network is disrupted.

What is the purpose of extended star topology?

Extended star topology connects multiple star topologies to a central hub, creating a larger, more scalable network. It allows for greater network expansion by linking several star networks together.

Why is mesh topology not commonly used today?

Mesh topology connects each device to every other device, which becomes inefficient and difficult to scale. It is not commonly used because adding more devices requires more connections, which becomes impractical.

What is hierarchical topology and how does it function?

Hierarchical topology is a tree-like structure where systems are connected in a hierarchy. Primary devices or systems connect to secondary ones, forming a clear, structured network.

What is the difference between LAN and WAN?

LAN (Local Area Network) is a private network that is confined to a small geographical area, such as a home or office. WAN (Wide Area Network) connects multiple LANs across larger distances, potentially across cities or countries.

How does a VPN help in connecting remote networks, and what benefits does it provide?

A VPN (Virtual Private Network) allows remote networks to connect securely over the internet. It helps reduce costs and provides encryption to ensure the security of data transmissions, making it a more cost-effective and safe way to connect distant networks.