CCNA 3 - Chapter 1 - LAN Architecture

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CCNA 3 - Chapter 1 - LAN Architecture
2012-09-04 01:55:34

LAN architecture
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  1. Describes the portion of the network where devices connect to the network and includes controls for allowing devices to communicate on the network.
    Access Layer
  2. In the hierarchical network design model, the later that invokes policy and routing control. 
    Distribution Layer
  3. At which layer in the hierarchical network design model are VLANs typically defined?
    Distribution Layer
  4. The backbone of a switched LAN. All traffic to end from peripheral networks must pass through this layer. It includes high-speed switching devices that can handle relatively large amounts of traffic. 
    Core Layer
  5. A desirable property of a network to handle growing amounts of traffic in a graceful manner. 
  6. The duplication of devices, services, or connections so that, in the event of a failure, the redundant devices, services, or connections can perform the work of those that failed. 
  7. A loosely defined networking measure based on throughput and error rates.
  8. An encompasing term describing the prevention and means of prevention of unauthorized access to an entity, location, or system.
  9. A measure of the lack of difficulty in a managing network devices and associated software in working order.
  10. A measure of the lack of difficulty in keeping network devices and associated software in working order. 
  11. The capability to carry voice traffic over an IP-based network with POTS-like functionality, reliability, amd voice quility. Enables a router to corry voice traffic over an IP network. 
    Voice Over IP (VoIP)
  12. Voice packets are transported using...
    IP in compliance with ITU-T spcification H.323
  13. The speed and compatibility of a group of switches running STP to agree on a loop-free Layer 2 topology for a switched LAN.
  14. A measure of performance for a transmission system that reflects its transmission quality and service available.
    Quality of Service (QoS)
  15. A digital or analog telephone switchboard located on the subscriber premises and used to connect private and public telephone networks.
    Private Branch Exchange (PBX)
  16. A large and diverse network connecting major sites within a company or other organization. 
    Enterprise Network
  17. How does a enterprise network differ from a WAN?
    An enterprise network is privately owned and maintained
  18. The powering of network devices over Ethernet cable. 
    Power over Ethernet (PoE)
  19. Filters and forewards packets based on OSI layer 2 through Layer 7 information at wire-speed by utilizing dedicated hardware that stores data structures mirroring routing table, ARP table, and ACL information.
    Multilayer Switch
  20. Which three options correctly associate a layer of the hierarchical design model with its function? (Choose three.)

    Core - interface for end devices
    Distribution - traffic control and security policies
    Access - interface for end devices
    Distribution - high-speed backbone
    Core - high-speed backbone
    Access - implementation of security policies
    • Distribution - traffic control and security policies
    • Access - interface for end devices
    • Core - high-speed backbone
  21. With respect to network design, what is convergence?
    a) implementation of standard equipment sets for LAN design
    b) implementation of a core-distribution-access design model for all sites in an enterprise
    c) a point in the network where all traffic "converges" before transmission to the destination, normally the core switch
    d) combining conventional data with voice on a common network
    d) combining conventional data with voice on a common network
  22. Name three potential benefits of a converged network.
    combines voice, video, and applications in one computer

    simplified network changes

    combines voice and data network staffs
  23. What factor may complicate user communities analysis?

    a) application changes may radically affect predicted data growth
    b) server to server traffic may skew user port usage data
    c) application usage is now always bound by department, or physical location
    d) different organization applications may share data stores
    c) application usage is now always bound by department, or physical location
  24. Data rate that each port on the switch is capable of attaining
    Wire Speed
  25. number of ports available on a single switch
    Port Density
  26. Processing apabilities of a switch by quantifying performance of the switch by how much data it can process per second
    Forwarding Rates
  27. Ability to utilize multiple switch ports currently for higher throughput data communication
    Link Aggregation
  28. What would be the port capacity of a single port on a 48-port Gigabit Ethernet switch?

    a) 48 Gbps
    b) 10 Mbps
    c)1000 Mbps
    d)100 Mbps
    c)1000 Mbps
  29. A switch that uses MAC addresses to foreward frames operated at which layer of the OSI model?

    a) Layer 1
    b) Layer 2
    c) Layer 3
    d) Layer 4
    b) Layer 2
  30. What is a feature offered by all stackable switches?

    a) predetermined number of ports
    b) fully redundant backplane
    c) support for Gigabit connectivity
    d) low bandwidth for inter-switch communications
    e) PoE Capability
    b) fully redundant backplane
  31. What function is performed by a Cisco access level switch?

    a) inter-VLAN support
    b) routing
    c) providing PoE
    d) link aggregation
    c) providing PoE
  32. Classifying and prioritizing traffic based on type of data.
    QoS (Quality of Service)
  33. Allow you to segment the traffic on a switch into separate subnetworks.
  34. Controls which end devices are allowed to communicate on the network.
    Access Layer
  35. Distribution layer and core layer are combined into one layer.
    collapsed core
  36. High-speed backbone of the internetwork capable of forwarding large amounts of data quickly.
    Core Layer
  37. Determine the design requirements for a network
    Business Goals
  38. Access layer switches can be configured with this option to provide control over which devices are allowed to connect to the network
    port security
  39. Cisco proproetary link aggregation technology
  40. Properly designed hierarchical networks can achieve near wire speed between all devices
  41. Consistency between switches at each layer allows for rapid recovery and simplified troubleshooting.
  42. Dramatically increases availability
  43. Controls the flow of the network traffic using policies and delineates breadcast domains be performing rounting functions between virtual LANs(VLANs).
    Distribution Layer
  44. The process of combining voice and video communications on a data network
  45. The modularity of the hierarchical design facilitates ease of network expansion.
  46. A graphical representation of a network infrastructure.
    topology diagram
  47. Cannot add hardware features or options beyond those that originally came with the switch
    fixed configuration switches
  48. allow installation of different line cards
    modular switches
  49. A process of measuring the bandwidth usage on a network and analyzing the data for the purpose of performance tuning, capacity planning, and making hardware improvement decisions.
    traffic flow analysis
  50. Reduces bottlenecks of traffic by allowing up to eight switch ports to be bound together for data communications.
    link aggregation
  51. The number of ports available on a single switch.
    port density
  52. Uses the network cable to deliver electicity to devices.
    Power over Ethernet (PoE)
  53. Generated between data storage devices on the network.
    Server-server traffic
  54. Interconnected using a special backplane cable
    stackable switches
  55. Typically traverses multi[le switches to reach its destination
    client-server traffic
  56. Defines the capabilities of a switch by classifying how much data the switch can process per second
    forwarding rates
  57. also know as Layer 3 switches
    multilayer switches
  58. A process of idenifying various groups and their impact on network performance.
    user community analysis
  59. Features of the Access Layer (6)
    • Bandwidth Aggregation
    • Fast Ethernet/Gigabit Ethernet
    • Port Security
    • Power over Ethernet (PoE)
    • Quality of Service (QoS)
    • VLANs
  60. Features of hte Distribution Layer (7)
    • Bandwidth Aggregation
    • Gigabit Ethernet/10-Gigabit Ethernet
    • High Forwarding Rate
    • Layer 3 support
    • Quality of Service (QoS)
    • Redundant Components
    • Security Policies/Access Control Lists
  61. Features of the Core Layer (6)
    • Bandwidth Aggregation
    • Gigabit Ethernet/10-Gigabit Ethernet
    • Very High Forwarding Rate
    • Layer 3 Support
    • QoS
    • Redundant Components