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Network Architectures for Data Center - 10

a CCNA Cloud CLDFND 210-451 quiz summary

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Mushtaq Smb
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  • Attributes of a data center network,

    1. Availability,
    2. Scalability,
    3. Flexibility,
    4. Manageability,
    5. Virtualization

  • Main distinctions between data center and campus networks,

    1. Majority of traffic direction (east-west versus north-south)
    2. Number of connections on a single host
    3. Data center networks are a more secure environment image.png

  • Functions of the aggregation layer on a three-tier data center network design,

    1. Default gateway for the servers,
    2. Supports east-west traffic between servers connected to different access switches,
    3. STP (Spanning Tree Protocol) root

      Note :- Routing protocol peering with external networks does not represent.

  • Fact regarding virtual device contexts (it emulates ethernet switches),

    with VDCs, a switch can deploy more than 4094 VLANs. image.png

  • Facts about virtual PortChannels(vPC),

    1. They allow two switches to behave like a single device,
    2. The peer-keepalive probes can traverse the peer trunk,
    3. You can form a peer trunk with only one physical connection,
    4. Primary and secondary roles must be established between the two switches.

      Note :- Using vPC eliminates the need for STP is not one.

  • Fabric Extenders facts,

    1. They cannot work without connecting to a parent switch,
    2. They create logical interfaces in the parent switch,
    3. They allow the connection of FCoE-enabled devices,
    4. They allow the connection of LACP-enabled devices

      Note :- They don't allow connection of STP-enabled devices.

  • Overlay Transport Virtualization facts,

    1. Allows VLAN extension between multiple sites,
    2. Can use multicast or unicast only backbones between data center sites,
    3. Blocks STP,
    4. Blocks unknown unicast frames

      Note :- It does not broadcast traffic

  • Options not required on Fibre Channel over Ethernet connection,

    1. Fiber connection,
    2. DCBX (Data Center Bridging Exchange) protocol

  • Protocol responsible for both OTV and FabricPath MAC address updates, IS-IS

  • Advantages of Spine leaf topologies over three-tier designs,

    1. Bandwidth scalability,
    2. Simplicity,
    3. Flexibility
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