Lecture 5-Question Answers session 1 | CCNA 200-301 | Network Zeal
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The QA Session-1 video for
The QA Session-1 video for the CCNA 200-301 exam, focusing on network basics, is a valuable resource for those preparing for the Cisco Certified Network Associate certification. This session is part of a comprehensive CCNA course available on YouTube, which covers all the essential topics needed to pass the exam.
What is peer to peer network?
What is server-client model?
what is a router?
what is hub and switch difference ?
What is OSI Model?
Cisco 3 layer architecture
What is a Peer-to-Peer Network?
A peer-to-peer (P2P) network is a decentralized network architecture where each device (node) has equal privileges and can act as both a client and a server. In P2P networks, there is no central server; instead, each node can share and access resources directly with other nodes. Common use cases include file sharing applications, such as BitTorrent, and distributed computing projects.
What is the Server-Client Model?
The server-client model is a network architecture where devices (clients) request and receive services from a central server. The server hosts resources, services, and data, and the clients access these by sending requests to the server. This model is common in web applications, where a web server serves web pages to client browsers, and in email services, where a mail server handles sending and receiving emails.
What is a Router?
A router is a networking device that forwards data packets between computer networks. It routes traffic from one network to another based on its IP address. Routers operate at the Network layer (Layer 3) of the OSI model and are essential for connecting different network segments, managing traffic, and ensuring data reaches its intended destination efficiently.
What is the Difference Between a Hub and a Switch?
*Hub:*
- Operates at the Physical layer (Layer 1) of the OSI model.
- Broadcasts incoming data packets to all ports, regardless of the destination.
- Can lead to network inefficiencies and collisions.
*Switch:*
- Operates at the Data Link layer (Layer 2) of the OSI model.
- Forwards data packets only to the specific port corresponding to the destination MAC address.
- Reduces network collisions and improves overall network performance.
What is the OSI Model?
The OSI (Open Systems Interconnection) model is a conceptual framework used to understand and implement network protocols in seven distinct layers:
1. *Physical Layer:* Handles the physical connection between devices and the transmission of raw bit streams.
2. *Data Link Layer:* Manages node-to-node data transfer and error detection/correction.
3. *Network Layer:* Routes data packets across multiple networks.
4. *Transport Layer:* Ensures reliable data transfer and error recovery.
5. *Session Layer:* Manages sessions and controls dialogues between applications.
6. *Presentation Layer:* Translates data formats between the application and the network.
7. *Application Layer:* Provides network services directly to end-user applications.
Cisco 3-Layer Architecture
Cisco's hierarchical network design model divides networks into three layers to optimize performance and scalability:
1. *Core Layer:*
- High-speed backbone that connects different distribution-layer devices.
- Ensures fast and reliable transportation of large amounts of data.
2. *Distribution Layer:*
- Connects the core layer to the access layer.
- Implements policies for routing, filtering, and WAN access.
3. *Access Layer:*
- Provides network access to end devices such as computers, printers, and IoT devices.
- Handles user access and ensures appropriate security and performance at the network edge.
#
*Modem:*
- *Function:* A modem (modulator-demodulator) converts digital signals from a computer into analog signals that can be transmitted over phone lines, cable systems, or other analog communication mediums.
-
- *Operation:* Modems perform modulation and demodulation. Modulation is the process of converting digital data to analog signals for transmission, while demodulation is converting received analog signals back to digital form.
- *Types:* There are various types of modems, including dial-up, DSL, cable, and fiber-optic modems.
*Repeater:*
- *Function:* A repeater amplifies or regenerates signals in a network to extend the transmission distance. It ensures that the signal remains strong and clear over long distances.
- *Use Case:* Repeaters are used in both wired and wireless networks to boost the signal strength over large distances where the signal would otherwise degrade.
- *Operation:* Repeaters receive the incoming signal, amplify it (or regenerate it), and then retransmit it. This helps overcome the signal attenuation that occurs over long distances.
- *Types:* There are different types of repeaters, including analog and digital repeaters, and specific types like optical repeaters used in fiber-optic communication.
What is peer to peer network?
What is server-client model?
what is a router?
what is hub and switch difference ?
What is OSI Model?
Cisco 3 layer architecture
What is a Peer-to-Peer Network?
A peer-to-peer (P2P) network is a decentralized network architecture where each device (node) has equal privileges and can act as both a client and a server. In P2P networks, there is no central server; instead, each node can share and access resources directly with other nodes. Common use cases include file sharing applications, such as BitTorrent, and distributed computing projects.
What is the Server-Client Model?
The server-client model is a network architecture where devices (clients) request and receive services from a central server. The server hosts resources, services, and data, and the clients access these by sending requests to the server. This model is common in web applications, where a web server serves web pages to client browsers, and in email services, where a mail server handles sending and receiving emails.
What is a Router?
A router is a networking device that forwards data packets between computer networks. It routes traffic from one network to another based on its IP address. Routers operate at the Network layer (Layer 3) of the OSI model and are essential for connecting different network segments, managing traffic, and ensuring data reaches its intended destination efficiently.
What is the Difference Between a Hub and a Switch?
*Hub:*
- Operates at the Physical layer (Layer 1) of the OSI model.
- Broadcasts incoming data packets to all ports, regardless of the destination.
- Can lead to network inefficiencies and collisions.
*Switch:*
- Operates at the Data Link layer (Layer 2) of the OSI model.
- Forwards data packets only to the specific port corresponding to the destination MAC address.
- Reduces network collisions and improves overall network performance.
What is the OSI Model?
The OSI (Open Systems Interconnection) model is a conceptual framework used to understand and implement network protocols in seven distinct layers:
1. *Physical Layer:* Handles the physical connection between devices and the transmission of raw bit streams.
2. *Data Link Layer:* Manages node-to-node data transfer and error detection/correction.
3. *Network Layer:* Routes data packets across multiple networks.
4. *Transport Layer:* Ensures reliable data transfer and error recovery.
5. *Session Layer:* Manages sessions and controls dialogues between applications.
6. *Presentation Layer:* Translates data formats between the application and the network.
7. *Application Layer:* Provides network services directly to end-user applications.
Cisco 3-Layer Architecture
Cisco's hierarchical network design model divides networks into three layers to optimize performance and scalability:
1. *Core Layer:*
- High-speed backbone that connects different distribution-layer devices.
- Ensures fast and reliable transportation of large amounts of data.
2. *Distribution Layer:*
- Connects the core layer to the access layer.
- Implements policies for routing, filtering, and WAN access.
3. *Access Layer:*
- Provides network access to end devices such as computers, printers, and IoT devices.
- Handles user access and ensures appropriate security and performance at the network edge.
#
*Modem:*
- *Function:* A modem (modulator-demodulator) converts digital signals from a computer into analog signals that can be transmitted over phone lines, cable systems, or other analog communication mediums.
-
- *Operation:* Modems perform modulation and demodulation. Modulation is the process of converting digital data to analog signals for transmission, while demodulation is converting received analog signals back to digital form.
- *Types:* There are various types of modems, including dial-up, DSL, cable, and fiber-optic modems.
*Repeater:*
- *Function:* A repeater amplifies or regenerates signals in a network to extend the transmission distance. It ensures that the signal remains strong and clear over long distances.
- *Use Case:* Repeaters are used in both wired and wireless networks to boost the signal strength over large distances where the signal would otherwise degrade.
- *Operation:* Repeaters receive the incoming signal, amplify it (or regenerate it), and then retransmit it. This helps overcome the signal attenuation that occurs over long distances.
- *Types:* There are different types of repeaters, including analog and digital repeaters, and specific types like optical repeaters used in fiber-optic communication.
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