Podcast
Questions and Answers
What is the primary role of a router in a network?
What is the primary role of a router in a network?
- To convert data into signals for transmission.
- To manage traffic within a LAN.
- To direct data packets between multiple networks. (correct)
- To connect devices within a single network.
At which OSI layer does a switch primarily operate?
At which OSI layer does a switch primarily operate?
- Layer 3 (Network Layer)
- Layer 4 (Transport Layer)
- Layer 2 (Data Link Layer) (correct)
- Layer 1 (Physical Layer)
Which of the following best describes the function of a Network Interface Card (NIC)?
Which of the following best describes the function of a Network Interface Card (NIC)?
- To connect devices to a network and handle signal conversion. (correct)
- To filter data packets before transmission.
- To route packets between different networks.
- To ensure data integrity during transmission.
What does fault tolerance in networking primarily involve?
What does fault tolerance in networking primarily involve?
Which mechanism allows automatic switching to a backup device in the event of a failure?
Which mechanism allows automatic switching to a backup device in the event of a failure?
What is the first step in how a packet-switched network operates?
What is the first step in how a packet-switched network operates?
What information does each packet in a packet-switched network contain?
What information does each packet in a packet-switched network contain?
Which of the following best describes load balancing in networking?
Which of the following best describes load balancing in networking?
Which protocol is commonly associated with router redundancy?
Which protocol is commonly associated with router redundancy?
What type of addresses does a switch primarily use for forwarding decisions?
What type of addresses does a switch primarily use for forwarding decisions?
Flashcards
What is a router?
What is a router?
A network device that connects multiple networks and directs data packets between them based on IP addresses.
What OSI layer does a router operate on?
What OSI layer does a router operate on?
A router operates at Layer 3 of the OSI model, responsible for network-level addressing and routing.
What is a switch?
What is a switch?
A network device that connects devices within a single network and forwards data frames based on MAC addresses.
What OSI layer does a switch operate on?
What OSI layer does a switch operate on?
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What is a Network Interface Card (NIC)?
What is a Network Interface Card (NIC)?
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What OSI layers does a NIC involve?
What OSI layers does a NIC involve?
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What is fault tolerance?
What is fault tolerance?
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How is redundancy used to achieve fault tolerance?
How is redundancy used to achieve fault tolerance?
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How does load balancing contribute to fault tolerance?
How does load balancing contribute to fault tolerance?
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What are failover mechanisms in fault tolerance?
What are failover mechanisms in fault tolerance?
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Study Notes
Router Functionality
- Connects multiple networks, routing data packets
- Operates at Layer 3 (Network Layer) of the OSI model
- Uses IP addresses to determine the best path for packets
- Consults routing tables and applies protocols like OSPF, BGP, or RIP
Switch Functionality
- Connects devices within a single network (e.g., LAN)
- Facilitates communication between devices
- Primarily operates at Layer 2 (Data Link Layer) but can operate at Layer 3
- Uses MAC addresses to forward frames within the same network
Network Interface Card (NIC)
- Hardware component connecting a device to a network
- Converts data into electrical, optical, or radio signals for transmission
- Involved in the Physical and Data Link layers (Layer 1 and 2)
- Handles signal transmission and MAC addresses/framing
Fault Tolerance in Networks
- Ability of a system to continue functioning during component failure
- Implementation techniques include redundancy (multiple devices/paths) and load balancing (distributing traffic)
- Failover mechanisms switch to backup devices automatically
- RAID protects data by replication
- High Availability protocols such as HSRP and VRRP improve reliability
Packet-Switched Network Operation
- Data is divided into small packets
- Each packet contains source and destination IP addresses
- Packets are routed individually based on network conditions
- Packets are reassembled at the destination
- Advantages include efficient bandwidth use, scalability, and fault tolerance
- Example: The internet sỠdụng this method
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