H12-921-V1.0: HCIE-Data Center Network (Written) V1.0

IPv6 global-unicast prefixes assigned by an ISP are provider-dependent and typically delivered as part of the provider’s connectivity service, making them economical for small and midsize enterprises. Their dependence on the ISP can require renumbering when the provider changes, reducing scalability. Independently planned and controlled address space instead requires provider-independent address resources.

OpenStack Neutron provides Layer 2 networking and IP address management through plug-ins and agents that can accommodate different vendor equipment and networking technologies. Its fundamental network objects include networks, subnets, and ports.

CloudFabric uses telemetry and intelligent analysis of network-wide O&M data to detect and analyze faults. Its intelligent O&M capability provides rapid root-cause locating, including learning and inference for unknown faults.

Containers share the host kernel rather than running independent guest kernels. This generally makes container images smaller and startup faster than virtual machines, while VMs provide stronger isolation through separate guest operating systems and kernels.

A native Fibre Channel storage network requires switches and interfaces that support the Fibre Channel protocol. Optical Ethernet ports provide an Ethernet physical connection, not Fibre Channel fabric capability.