Questions and Answers
What is the primary function of the devices in the access layer?
What type of switch is likely to be used in the second tier of a three-tier architecture?
What is the problem that a three-tier architecture solves?
What is the purpose of the top tier in a three-tier architecture?
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What is another name for a multilayer switch?
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How many tiers are there in a three-tier architecture?
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What type of devices are typically connected to a layer 2 switch?
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What is the benefit of using a multilayer switch in a three-tier architecture?
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What is the primary purpose of cross-connecting device three and device four in the distribution layer?
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What is the term used to describe the layer that consists of devices three, four, E, F, G, and H?
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In the three-tier architecture, what is the primary function of the core layer?
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In the two-tier architecture, what is typically found at the top of a rack in a data center?
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What is the primary advantage of the two-tier architecture over the three-tier architecture?
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Which of the following is NOT a characteristic of the three-tier architecture?
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What is the term used to describe the concept of providing alternative paths for data transmission in case of a failure?
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What is the primary function of the devices in the core layer?
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What is the term used to describe the layer that consists of devices one, two, A, and B?
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Why are hosts in a data center likely to have two network adapters?
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What is the primary goal of storage networks in terms of access to storage devices?
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What is the characteristic of wide area networks (WANs) in terms of geography?
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What is the purpose of IPsec and tunneling in wide area networks?
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What is the role of software defined networking (SDN) in network architectures?
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What is the primary focus of the next video in the series, according to the speaker?
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What is the key benefit of using software defined networking in network architectures?
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What is the relationship between the underlay and logical overlays in wide area networks?
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What is the common thread among the four network architectures discussed?
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What is the term used to describe the switches in the leaf layer of a two-tier hierarchy in a data center?
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What is the primary reason for having multiple TOR switches in a rack in a data center?
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What is the term used to describe the layer in a two-tier hierarchy that connects to the leaf layer switches?
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What is the key characteristic of a two-tier hierarchy in a data center?
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What is the primary difference between a two-tier hierarchy and a three-tier hierarchy?
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What type of network architecture is typically used in a campus environment?
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What is the term used to describe the traffic flowing between the leaf layer and the spine layer in a two-tier hierarchy?
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What is the purpose of a storage network?
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What is the term used to describe the architecture of a two-tier hierarchy in a data center?
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What is the main difference between a TOR switch and a spine switch?
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Study Notes
Network Architecture Types
- There are four specific network architecture types: three-tier architecture, two-tier architecture, storage network, and wide area network.
Three-Tier Architecture
- The three-tier architecture is composed of three layers: access layer, distribution layer, and core layer.
- The access layer is where devices connect to the network.
- The distribution layer is where multiple access layers are connected together.
- The core layer is responsible for interconnecting multiple distribution layers.
- This architecture is often used in large enterprise environments with end users.
- It provides high speed connectivity between devices and fault tolerance.
Two-Tier Architecture
- The two-tier architecture is composed of two layers: leaf layer and spine layer.
- The leaf layer is where hosts (e.g., servers) connect to switches (also known as top of rack switches).
- The spine layer is where multiple leaf layers are connected together.
- This architecture is often used in data center environments.
- It provides high speed connectivity and fault tolerance.
Storage Network
- A storage network is a specific type of network architecture designed for high-speed access from servers to storage devices.
- It uses specific protocols and options for storage networking.
- Storage networks will be explored in more detail in a separate video.
Wide Area Network
- A wide area network (WAN) is a type of network architecture that connects devices over a large geographical area (e.g., across a country).
- WANs use underlay (physical connections) and overlay (logical connections) technologies.
- WANs often use IPsec and tunneling to secure connections.
- Software defined networking (SDN) can be used to manage WANs.
Additional Concepts
- Fault tolerance refers to the ability of a network to continue functioning even if one or more devices fail.
- Cross-connectivity refers to the connections between devices at the same layer in a network architecture.
- East-West traffic and North-South traffic will be explored in more detail in a separate video.
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Description
Learn about the concept of 3-tier architecture in network building, where devices are connected as building blocks. This video serves as an introduction to different network architecture types.