Questions and Answers
Which two statements about the purpose of the OSI model are accurate? (Choose two)
What is the default behavior of a Layer 2 switch when a frame with an unknown destination MAC address is received?
The Layer 2 switch floods packets to all ports except the receiving port in the given VLAN.
What is the destination MAC address of a broadcast frame?
ff:ff:ff:ff:ff:ff
Which action is taken by a switch port enabled for PoE power classification override?
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In which way does a spine-and-leaf architecture allow for scalability in a network when additional access ports are required?
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A frame that enters a switch fails the Frame Check Sequence. Which two interface counters are incremented? (Choose two)
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What are two reasons that cause late collisions to increment on an Ethernet interface? (Choose two)
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What is the function of a server?
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What is a function of TFTP in network operations?
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What are two functions of a server on a network? (Choose two)
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What is the primary function of a Layer 3 device?
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What is the same for both copper and fiber interfaces when using SFP modules?
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What is a characteristic of spine-and-leaf architecture?
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What are two descriptions of three-tier network topologies? (Choose two)
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What benefit does controller-based networking provide versus traditional networking?
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Which purpose does a northbound API serve in a controller-based networking architecture?
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What is the name of the layer in the Cisco borderless switched network design that is considered to be the backbone used for high-speed connectivity and fault isolation?
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What technology should be recommended for a company seeking to interconnect several branch offices with high-speed converged traffic?
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Which two WAN architecture options help a business improve scalability and reliability for the network? (Choose two)
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Which WAN access technology is preferred for a small office/home office architecture?
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Which two functions are performed by the core layer in a three-tier architecture? (Choose two)
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Which function is performed by the collapsed core layer in a two-tier architecture?
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What identifies the functionality of virtual machines?
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Study Notes
OSI Model and Networking Concepts
- The OSI model defines network functions at each layer, facilitating understanding of information travel within networks.
- A Layer 2 switch floods packets to all ports except the one that received a frame with an unknown destination MAC address.
- A broadcast frame has the destination MAC address of ff:ff:ff:ff:ff:ff.
Power over Ethernet (PoE)
- A switch port with PoE power classification override shuts down and becomes err-disabled if it exceeds the maximum power threshold.
Spine and Leaf Architecture
- In spine-leaf architecture, scalability is achieved by adding leaf switches that connect to all spine switches.
Network Interface and Errors
- On a frame that fails the Frame Check Sequence, both CRC and input errors counters are incremented.
- Late collisions increment due to exceeding cable length limits or a half-duplex configuration on one connection side.
Server Functions
- Servers provide shared applications and simultaneously handle requests from multiple workstations.
TFTP and Network Operations
- TFTP transfers IOS images from a server to a router, facilitating firmware upgrades.
Layer 3 Device Functionality
- The primary function of a Layer 3 device is to pass traffic between different networks.
SFP Modules
- Copper and fiber interfaces using SFP modules can be hot-swapped, ensuring minimal service interruption.
Three-Tier Network Topology
- In three-tier topologies, the network core maintains connectivity during device failures, while the distribution layer supports both Layer 2 and Layer 3 technologies.
Controller-based Networking
- Controller-based networking centralizes configuration and monitoring, improving efficiency compared to traditional setups.
Northbound API
- A northbound API in controller-based networking allows communication between the controller and applications.
Core Layer in Cisco Borderless Network
- The core layer in Cisco's architecture serves as the backbone for high-speed connectivity and fault isolation.
Ethernet WAN
- Ethernet WAN is ideal for interconnecting branch offices, enabling high-speed converged traffic for voice, video, and data.
WAN Architecture for Scalability
- Dynamic routing and dual-homed branches are WAN architecture options that enhance network scalability and reliability.
Preferred WAN Access for Small Offices
- Broadband cable access is the preferred WAN technology for small office/home office setups.
Core Layer Functions in Three-Tier Architecture
- The core layer provides uninterrupted forwarding services and ensures timely data transfer between layers.
Collapsed Core Layer
- In two-tier architecture, the collapsed core layer enforces routing policies.
Virtual Machines Functionality
- Virtual machines are managed by a hypervisor, which can virtualize components like CPU, memory, and storage.
Cloud Services and Operating Systems
- Organizations using cloud services can select platforms allowing the installation of their own operating systems on virtual machines.
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Description
Test your knowledge with these flashcards on key concepts from the CCNA curriculum. This quiz includes questions about the OSI model and Layer 2 switch behavior, which are essential for network understanding. Perfect for anyone preparing for their CCNA certification.