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Questions and Answers
What is the primary function of a router in a network?
What is the primary function of a router in a network?
At which OSI layer does a standard switch primarily operate?
At which OSI layer does a standard switch primarily operate?
Which protocol is not typically used for routing decisions by routers?
Which protocol is not typically used for routing decisions by routers?
What is an example of a Fault Tolerance mechanism in networking?
What is an example of a Fault Tolerance mechanism in networking?
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What role does a Network Interface Card (NIC) play in a device?
What role does a Network Interface Card (NIC) play in a device?
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In a packet-switched network, how are data packets routed?
In a packet-switched network, how are data packets routed?
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Which of the following is NOT a characteristic of the Data Link Layer in networking?
Which of the following is NOT a characteristic of the Data Link Layer in networking?
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What is the importance of redundancy in a fault-tolerant network?
What is the importance of redundancy in a fault-tolerant network?
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Which of the following describes the role of MAC addresses in networking?
Which of the following describes the role of MAC addresses in networking?
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Study Notes
Router Purpose and OSI Layer
- Connects multiple networks, directing data packets between them
- Enables communication between devices on different networks
- Operates at Layer 3 (Network Layer) of the OSI model
- Uses IP addresses to determine the best path for packets
- Consults routing tables and utilizes routing protocols (OSPF, BGP, RIP)
Switch Purpose and OSI Layer
- Connects devices within a single network (e.g., LAN)
- Facilitates communication between devices
- Operates primarily at Layer 2 (Data Link Layer), sometimes Layer 3
- Uses MAC addresses to forward frames to appropriate destinations within the same network
Network Interface Card (NIC) Purpose and OSI Layers
- Hardware component providing physical and logical network interface to a device
- Converts data into (electrical, optical, or radio) signals for network transmission
- Involves signal transmission (Physical Layer) and MAC address handling & framing (Data Link Layer).
Fault Tolerance in Networking
- Defined as a system/network's ability to function after a component failure.
- Implementation strategies include redundancy (multiple devices and paths) to avoid single points of failure
- Load balancing distributes traffic across multiple servers
- Failover automatically switches to backup devices when primary fails
- RAID protects data storage through replication across multiple drives
- High Availability Protocols (like HSRP and VRRP) ensure network availability via redundant paths.
Packet-Switched Network
- Data broken down into small packets, individually routed
- Each packet contains source and destination IP addresses
- Routed independently based on network conditions
- Packets reassembled at destination in the correct order
- Enables efficient bandwidth utilization with scalability and fault tolerance (example: the internet)
- Protocols like IP and TCP manage addressing and reliable packet delivery
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Description
This quiz explores the functions and OSI layer roles of key networking devices such as routers, switches, and Network Interface Cards (NICs). Test your understanding of how these components interact within a network and their purposes in communication across different layers of the OSI model.
