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Network Architecture & Virtualization (350-401 ENCOR) Flashcards
Cisco CCNP Enterprise 350-401-ENCOR Flashcards
Study our Network Architecture & Virtualization (350-401 ENCOR) flashcards for the Cisco CCNP Enterprise 350-401-ENCOR exam with 42+ flashcards. View as flashcards, a searchable table, or as a fun matching game.
| Front | Back |
| Advantage of spine leaf | Predictable latency and high east west bandwidth with simple path scaling |
| Common multi site connectivity options | MPLS L3VPN EVPN VXLAN with IPsec or DMVPN for secure overlay between sites |
| Difference between HSRP and VRRP | HSRP is Cisco proprietary VRRP is standards based with different election mechanics |
| How does BUM traffic get handled in VXLAN | Broadcast Unknown Unicast and Multicast traffic is handled with multicast replication or head end replication |
| How does EVPN handle MAC learning | Control plane learning via BGP reduces need for data plane multicast flooding |
| Purpose of control plane separation | Decouples forwarding from control plane enabling scalable centralized learning and policy |
| Purpose of route reflectors | Reduce full mesh BGP requirements by reflecting routes between IBGP peers |
| Use case for VRF | Segmentation of tenants or services to provide overlapping IP spaces and traffic isolation |
| What does VTEP stand for | Virtual Tunnel Endpoint which encapsulates and decapsulates VXLAN traffic |
| What is a VRF | Virtual Routing and Forwarding instance that creates multiple separate routing tables on one device |
| What is an EVPN | Ethernet VPN control plane often used with VXLAN for MAC learning and active active multihoming |
| What is an overlay network | Logical network built on top of an underlay using encapsulation to provide abstracted services |
| What is an underlay network | Physical infrastructure that provides IP connectivity and transport for overlay networks |
| What is BGP EVPN role in VXLAN | BGP EVPN provides control plane for VXLAN distributing MAC IP and VTEP reachability |
| What is BGP route reflection drawback | Possible routing loops and suboptimal routing if not designed with clusters and confed considerations |
| What is control plane for EVPN routes | BGP is used to advertise EVPN route types and distribute MAC and IP information |
| What is control plane separation benefit for virtualization | Enables centralized policy scale and easier mobility of endpoints across physical infrastructure |
| What is DMVPN | Dynamic Multipoint VPN scalable hub and spoke VPN using NHRP mGRE and IPsec |
| What is ECMP | Equal Cost Multipath allows traffic to be distributed across multiple equal cost paths |
| What is encapsulation overhead for VXLAN | UDP plus VXLAN plus outer IP Ethernet headers typically adds about 50 bytes |
| What is EVPN IRB | Integrated Routing and Bridging provides routed gateway between VXLAN segments using IRB interfaces |
| What is EVPN multihoming mode | Allows active active multihoming of a MAC across multiple edge devices with DF election |
| What is EVPN Route Type 5 | IP Prefix route used to advertise IP prefixes for routing and inter subnet traffic |
| What is EVPN Type 2 | MAC IP Advertisement route used to advertise MAC and optionally IP under EVPN |
| What is GLBP | Gateway Load Balancing Protocol provides load sharing and redundancy for default gateway |
| What is head end replication | Replication of overlay traffic from an ingress VTEP to multiple remote VTEPs without multicast |
| What is HSRP | First hop redundancy protocol providing an active standby default gateway for hosts |
| What is L2 stretching disadvantage | Increases broadcast domain size and can complicate failure isolation and convergence |
| What is L3VPN over MPLS | Service that provides routed VPNs using MPLS and VRFs for customer separation |
| What is MPLS | Label switching technology that forwards packets based on short labels rather than IP addresses |
| What is MTU consideration for overlays | Encapsulation increases packet size so MTU must be increased to avoid fragmentation |
| What is network virtualization edge NVE | Software entity on a device that implements encapsulation and decapsulation for overlays |
| What is OSPF area design goal | Limit LSA scope reduce convergence overhead and scale control within large networks |
| What is role of a leaf switch | Connects endpoints servers and edge devices to the fabric and hosts VTEPs |
| What is role of a spine switch | Provides high capacity switching backbone connecting leaf switches |
| What is spine leaf architecture | Two tier design with leaf switches connecting endpoints and spine switches providing high speed east west fabric |
| What is split horizon in EVPN | Prevents loops by blocking learning between VNI peers on the same Ethernet segment |
| What is VNI to VLAN mapping | Association between VXLAN VNI and physical access VLAN used at edge VTEPs |
| What is VXLAN | Layer 2 over Layer 3 overlay encapsulation protocol using VNI for segmentation |
| What is VXLAN VNI | Pseudo VLAN identifier used to segregate overlay L2 segments in VXLAN |
| When to use multicast in VXLAN | When efficient one to many distribution is needed and underlay supports multicast routing |
| Why use overlay networks | Provide flexible segmentation mobility and simplified multi tenancy without changing underlay |
About the Flashcards
This collection of flashcards for the Cisco CCNP Enterprise exam provides a focused review of modern data center and networking principles. The deck is designed to help you solidify your knowledge of essential terminology and key concepts, from foundational routing and switching to advanced overlay technologies. By studying these cards, you will reinforce your understanding of how physical underlay networks support logical overlay services, a critical aspect of today's scalable network infrastructures.
You will be able to test your recall on specific topics such as VXLAN implementation, including VTEPs and VNIs, and the role of BGP EVPN as a control plane. The cards also cover spine-leaf architecture, first-hop redundancy protocols like HSRP and VRRP, and virtualization concepts such as VRFs. This is an excellent tool for reviewing the core ideas and protocols that are fundamental to building and managing complex networks.
Topics covered in this flashcard deck:
- VXLAN and Overlay Networks
- BGP EVPN Control Plane
- Spine-Leaf Fabric Architecture
- First-Hop Redundancy Protocols
- Virtual Routing and Forwarding (VRF)
- MPLS and VPN Technologies