Podcast
Questions and Answers
What is the difference between a RIB and a FIB?
What is the difference between a RIB and a FIB?
- The RIB is used to make IP source prefix-based switching decisions.
- The RIB maintains a mirror image of the FIB.
- The FIB is populated based on RIB content. (correct)
- The FIB is where all IP routing information is stored.
Which QoS component alters a packet to change the way that traffic is treated in the network?
Which QoS component alters a packet to change the way that traffic is treated in the network?
- Shaping
- Policing
- Classification
- Marking (correct)
Which statement about Cisco Express Forwarding is true?
Which statement about Cisco Express Forwarding is true?
- It makes forwarding decisions by a process that is scheduled through the IOS scheduler.
- It uses a fast cache that is maintained in a router data plane.
- It maintains two tables in the data plane: the FIB and adjacency table. (correct)
- The CPU of a router becomes directly involved with packet-switching decisions.
What is a benefit of deploying an on-premises infrastructure versus a cloud infrastructure deployment?
What is a benefit of deploying an on-premises infrastructure versus a cloud infrastructure deployment?
How does QoS traffic shaping alleviate network congestion?
How does QoS traffic shaping alleviate network congestion?
Which two facts apply to traffic policing? (Choose two.)
Which two facts apply to traffic policing? (Choose two.)
Which component handles the orchestration plane of the Cisco SD-WAN?
Which component handles the orchestration plane of the Cisco SD-WAN?
What are two device roles in Cisco SD-Access fabric? (Choose two.)
What are two device roles in Cisco SD-Access fabric? (Choose two.)
What is the role of the vSmart controller in a Cisco SD-WAN environment?
What is the role of the vSmart controller in a Cisco SD-WAN environment?
When a wired client connects to an edge switch in a Cisco SD-Access fabric, which component decides whether the client has access to the network?
When a wired client connects to an edge switch in a Cisco SD-Access fabric, which component decides whether the client has access to the network?
Which benefit is offered by a cloud infrastructure deployment but is lacking in an on-premises deployment?
Which benefit is offered by a cloud infrastructure deployment but is lacking in an on-premises deployment?
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Study Notes
RIB vs FIB
- RIB (Routing Information Base) is used to create and manage a routing table.
- FIB (Forwarding Information Base) is populated based on the contents of the RIB.
- The FIB is utilized for making forwarding decisions based on IP routing contexts.
QoS Components
- Marking alters packets to change their treatment within the network.
- Traffic shaping alleviates congestion by buffering packets above the committed rate.
Cisco Express Forwarding
- Cisco Express Forwarding maintains two tables: the FIB and adjacency table.
- Forwarding decisions in CEF are made without direct involvement of the router's CPU.
On-Premises vs Cloud Infrastructure
- On-premises infrastructure offers lower latency for systems that are physically close, enhancing performance.
- Cloud infrastructure provides benefits like rapid scaling and resource allocation.
Traffic Policing
- Policing should be implemented as close to the source as possible to effectively manage traffic.
- Traffic that exceeds the defined rate is dropped in a policing mechanism.
Cisco SD-WAN Components
- vBond handles the orchestration plane in Cisco SD-WAN deployments.
- vSmart controller manages the control plane for the SD-WAN environment, ensuring effective network management.
Device Roles in Cisco SD-Access Fabric
- Edge nodes and border nodes play crucial roles in facilitating connectivity and security.
- Access switches are involved in connecting end devices to the network.
Client Access Control
- In Cisco SD-Access fabric, the Identity Services Engine (ISE) determines client access to the network upon connecting to an edge switch.
Cloud Deployment Benefits
- Efficient scalability is a significant advantage of cloud infrastructure, making it easier to adapt to changing demands compared to on-premises solutions.
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