CCNP Service Provider QoS Provider Networks Quiz

1. What does CBR stand for in the context of traffic modeling?

Class-Based Routing

Constant Bit Rate

Committed Burst Rate

Core Backbone Routing

2. True or False: In provider networks, QoS marking should be done at the customer edge (CE) device and never re-marked by the provider.

True

False

3. In a service provider's QoS model, which layer typically defines Service Level Agreements (SLAs)?

Data Link Layer (Layer 2)

Network Layer (Layer 3)

Business/Contract Layer

Physical Layer (Layer 1)

Submit

5. Which MPLS QoS feature allows explicit control over traffic engineering paths based on QoS requirements?

RSVP-TE (Resource Reservation Protocol with Traffic Engineering)

BGP Fast Convergence

IGP Metric Adjustment

Static Routing

Submit

7. What is the main advantage of Low Latency Queuing (LLQ) over standard priority queuing?

LLQ eliminates all packet loss

LLQ guarantees bandwidth for non-priority traffic while expediting priority traffic

LLQ reduces CPU overhead

LLQ works only on Ethernet interfaces

8. In provider networks, MPLS provides QoS benefits primarily through which mechanism?

IP header rewriting

Label-based forwarding and traffic engineering

Enhanced encryption

Increased MTU size

9. Which QoS mechanism allows you to set a maximum bandwidth limit on an interface or traffic class?

Traffic Shaping

Low Latency Queuing (LLQ)

Congestion Avoidance

Random Early Detection (RED)

Submit

11. In Assured Forwarding, which DSCP class provides the highest priority?

AF1

AF2

AF4

AF3

12. Which QoS model uses a single service class and assumes a highly overprovisioned network?

Differentiated Services (DiffServ)

IntServ (Integrated Services)

Best Effort

MPLS Traffic Engineering

13. Which QoS tool is used to classify traffic based on Layer 3 to Layer 7 parameters?

Access Control Lists (ACLs)

Class-Based Marking

Network-Based Application Recognition (NBAR)

Policy-Based Routing (PBR)

Submit

15. What is the standard DSCP value for Expedited Forwarding?

101110 (46)

111000 (56)

000000 (0)

110000 (48)

16. Which statement is true about Expedited Forwarding (EF) per-hop behavior?

EF guarantees bandwidth but not latency

EF provides low latency, loss, and jitter for premium traffic

EF is used for best-effort traffic

EF requires RSVP signaling

Submit

18. Which queuing algorithm provides the most fairness across flows in provider networks?

FIFO (First In, First Out)

Priority Queuing (PQ)

Weighted Fair Queuing (WFQ)

Strict Priority Queuing

Submit

20. What is the primary purpose of traffic policing in provider networks?

Increase link bandwidth

Enforce contracted service levels by dropping or marking excess traffic

Eliminate all packet loss

Reduce CPU load on routers

21. In DiffServ, the DSCP field replaces which older QoS marking field in the IP header?

TTL (Time to Live)

ToS (Type of Service)

Flags

Protocol

CCNP Service Provider QoS for Provider Networks Quiz

1. What does CBR stand for in the context of traffic modeling?

2.

What first name or nickname would you like us to use?

2. True or False: In provider networks, QoS marking should be done at the customer edge (CE) device and never re-marked by the provider.

3. In a service provider's QoS model, which layer typically defines Service Level Agreements (SLAs)?

4. Class-Based Weighted Fair Queuing (CBWFQ) allocates bandwidth to classes based on ____.

5. Which MPLS QoS feature allows explicit control over traffic engineering paths based on QoS requirements?

6. In the Context of provider networks, congestion avoidance mechanisms like WRED prevent tail ____ by randomly dropping packets.

7. What is the main advantage of Low Latency Queuing (LLQ) over standard priority queuing?

8. In provider networks, MPLS provides QoS benefits primarily through which mechanism?

9. Which QoS mechanism allows you to set a maximum bandwidth limit on an interface or traffic class?

10. The two-rate, three-color marker algorithm is commonly called the ____ meter.

11. In Assured Forwarding, which DSCP class provides the highest priority?

12. Which QoS model uses a single service class and assumes a highly overprovisioned network?

13. Which QoS tool is used to classify traffic based on Layer 3 to Layer 7 parameters?

14. In a three-color marker, the red action typically means ____.

15. What is the standard DSCP value for Expedited Forwarding?

16. Which statement is true about Expedited Forwarding (EF) per-hop behavior?

17. In MPLS-based QoS, traffic is classified and assigned to a specific ____ at ingress.

18. Which queuing algorithm provides the most fairness across flows in provider networks?

19. Traffic shaping differs from policing in that shaping ____.

20. What is the primary purpose of traffic policing in provider networks?

21. In DiffServ, the DSCP field replaces which older QoS marking field in the IP header?