What are two benefits of using the DiffServ QoS model? (Choose two)

The correct answer is B. It is highly scalable. D. It provides many different levels of quality. Differentiated Services (DiffServ) marks traffic at the edge of the network using DSCP bits in the IP header and applies per-hop behaviors (PHBs) at each router based on those markings. Its two primary benefits are: High scalability (B) - because routers only need to maintain…

Quality of Service

Question

Options

AIt offers an absolute guarantee of service quality.
BIt is highly scalable.
CRTCP is scalable.
DIt provides many different levels of quality.
ERSVP is not scalable.

How the community answered

(59 responses)

A
5% (3)
B
92% (54)
C
2% (1)
E
2% (1)

Explanation

Differentiated Services (DiffServ) marks traffic at the edge of the network using DSCP bits in the IP header and applies per-hop behaviors (PHBs) at each router based on those markings. Its two primary benefits are: High scalability (B) - because routers only need to maintain per-class state (not per-flow state), DiffServ scales efficiently across large enterprise and service-provider networks. Multiple quality levels (D) - DiffServ supports a rich set of traffic classes (EF for voice, AF for video/data, BE for best-effort, etc.), providing fine-grained quality differentiation. DiffServ does NOT provide an absolute guarantee of service quality (that is IntServ/RSVP). Options C and E describe RTCP and RSVP, which are unrelated to DiffServ's benefits.

Topics

#DiffServ#QoS benefits#scalability#service differentiation

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