Quiz for You on Modern Data Center Networking Architecture There is a test for you on modern data center networking architecture provided by Erica Mixon from techtarget.com. As business needs have evolved, so has data center networking architecture. Virtualized, abstracted networks are now gaining traction as software-defined technologies take hold in the enterprise. But for network managers used to more traditional traffic forwarding patterns-- where one IP address would simply "talk" to another--some of the more modern networking concepts can seem complicated. Familiarize yourself with virtual networks, software-defined networking (SDN) and other recent data center networking architecture trends with this quiz. There are 7 questions testing you on modern data center networking architecture. QUESTION 1 What is the primary function of Virtual Extensible LAN (VXLAN)?
Manages firewall rules and troubleshoots connectivity issues
Provides segregation of traffic, and routes traffic across a specific network path
Enables containers to communicate with each other
Transmits overlay packets and routes tables
QUESTION 2 In a modern data center networking architecture that supports hybrid cloud, which network layer is used to transmit VXLAN packets or other overlay packets?
Overlay network
SD-WAN
Underlay network
MPLS
QUESTION 3 How does SD-WAN architecture differ from traditional networking architecture?
It uses flow tables created by an SDN controller rather than routing tables at edge routers
It relies only on IP addresses rather than abstracted networks
It routes tables with a core router instead of an edge router
It depends on a three-tiered, hierarchically designed network architecture
QUESTION 4 Which is not a benefit of microsegmentation?
Supports fast, flexible and granular security configurations
Eliminates the need to hairpin traffic
Ties security policies to the network hardware rather than the workload
Eradicates need to manually configure firewall rules on individual hardware devices
QUESTION 5 How many available IDs can be assigned to a VXLAN at any given time?
4,096
160,000
1 million
16 million
QUESTION 6 Which of the following is not a feature of leaf-spine architecture?
It has a three-tier model, consisting of an access layer, an aggregation layer and a core
It has multiple connections to the core
It eliminates the need for devices to wait for open connections
It flattens enterprise networks
QUESTION 7 What are the three main functional blocks of network functions virtualization management and orchestration (NFV MANO)?
Virtual network functions (VNF) managers, virtual machines and hypervisors
NFV orchestrators, VNF managers and virtualized infrastructure managers (VIMs)
NFV managers, VNF orchestrators and VIMs
NFV orchestrators, routers and load balancers
Get the Correct Answers QUESTION 1 CORRECT ANSWERProvides segregation of traffic, and routes traffic across a specific network path VXLAN is an encapsulation protocol. A VXLAN packet encapsulates traffic from one segment, delivers it across the network and decapsulates it on the other side. VXLAN can also route traffic via a specific path across the network. For example, VXLAN encapsulation can tunnel traffic flows between devices, such as firewalls, until it has travelled across all required devices.
QUESTION 2 CORRECT ANSWERUnderlay network The modern data center network resembles a layer cake, rather than just a group of IP addresses. The underlay network the bottom of that layer cake provides a foundation for all other network services. The underlay transmits VXLAN and other overlay packets, so admins must understand a different way to address connectivity issues.
QUESTION 3 CORRECT ANSWERIt uses flow tables created by an SDN controller rather than routing tables at edge routers
SDWAN architecture attempts to abstract the network infrastructure that connects LANs to one another. It uses flow tables created by a SDN controller rather than routing tables at edge routers. With traditional networks, admins had to coordinate with the networking team to ensure that applications could use the existing infrastructure to communicate with remote locations. Now, admins make changes to routing configurations by making changes at the controller, and allow the resulting table to transmit to relevant devices.
QUESTION 4 CORRECT ANSWERTies security policies to the network hardware rather than the workload Softwaredefined networking and softwaredefined data center technology more easily supports microsegmentation, or the division of the data center in logical units, usually by application or workload. Among other benefits, microsegmentation ties security policies to the workload rather than the network hardware, which means that any rule applied to a workload will follow that workload, even as it migrates to different environments. This allows admins to better balance computing loads without having to create new security rules.
QUESTION 5 CORRECT ANSWER16 million Virtual LANs (VLANs) isolate apps and tenants in a cloud computing environment, but can only assign 4,096 network IDs at a given time which may not be enough for a large multitenant environment. Virtual Extensible LAN extends the VLAN address space and adds a 24bit segment ID, increasing available IDs to 16 million. Millions of isolated Layer 2 VXLAN networks can coexist on a common Layer 3 infrastructure because the VXLAN segment ID in each frame segregates individual logical networks.
QUESTION 6 CORRECT ANSWERIt has a threetier model, consisting of an access layer, an aggregation layer and a core As data flows shift to an east to west movement in the data center, problems can arise, such as network bottlenecks and congested uplinks among the access layer and aggregation layer. Leafspine architecture consisting of
leaf switches and spine switches addresses these issues by flattening enterprise networks from three tiers to two. In turn, it helps prevent network bottlenecks, improves latency, and reduces deployment and maintenance costs.
QUESTION 7 CORRECT ANSWERNFV orchestrators, VNF managers and virtualized infrastructure managers (VIMs) NFV MANO, an architectural framework for managing and orchestrating virtualized network functions, has three main functional blocks: NFV orchestrators, VNF managers and VIMs. These three blocks work together to deploy and connect functions and services throughout the network. NFV orchestrators control the integrations of new network services and VNFs into a virtual framework. VNF managers supervise the lifecycle of VNF instances, and VIMs manage NFV infrastructure.
Original Test from http://searchdatacenter.techtarget.com/quiz/Test-yourselfon-modern-data-center-networking-architecture
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