QoS Concepts

Which QoS model uses a per-hop behavior to provide differentiated services in IP networks?

IntServ (Integrated Services)

DiffServ (Differentiated Services)

MPLS (Multiprotocol Label Switching)

ATM (Asynchronous Transfer Mode)

What is the main purpose of traffic shaping in QoS?

To increase bandwidth for all applications

To limit the bandwidth of certain applications to avoid congestion

To encrypt data for secure transmission

To prioritize voice traffic over data traffic

Which QoS mechanism is used to ensure that traffic does not exceed a specified rate, by delaying excess packets?

Policing

Shaping

Marking

Scheduling

In the context of QoS, what does the acronym DSCP stand for?

Data Service Control Protocol

Differentiated Services Code Point

Digital Signal Control Protocol

Dynamic Service Configuration Protocol

Which QoS technique is used to drop packets that exceed a certain threshold to prevent network congestion?

Traffic Shaping

Traffic Policing

Weighted Fair Queuing (WFQ)

Class-Based Weighted Fair Queuing (CBWFQ)

Which scheduling mechanism ensures that high-priority traffic is sent before lower-priority traffic?

FIFO (First In, First Out)

PQ (Priority Queuing)

WFQ (Weighted Fair Queuing)

RED (Random Early Detection)

What is the function of Random Early Detection (RED) in QoS?

To prioritize voice traffic over video traffic

To randomly drop packets before a queue becomes full to avoid congestion

To provide fair bandwidth allocation among all flows

To shape traffic to a predefined rate

Which QoS model uses RSVP (Resource Reservation Protocol) to reserve resources across a network?

DiffServ (Differentiated Services)

IntServ (Integrated Services)

MPLS (Multiprotocol Label Switching)

FIFO (First In, First Out)

What does the term "jitter" refer to in a network context, particularly concerning QoS?

The variation in packet arrival times

The total delay experienced by packets

The rate at which packets are dropped

The average time to transmit a packet

Which mechanism ensures that packets are marked and classified to receive a specific level of QoS treatment?

Traffic Shaping

Traffic Policing

Traffic Marking

Traffic Scheduling

Which QoS model involves reserving resources along the entire path of the data flow?

DiffServ (Differentiated Services)

MPLS (Multiprotocol Label Switching)

IntServ (Integrated Services)

ATM (Asynchronous Transfer Mode)

What is the purpose of class-based weighted fair queuing (CBWFQ) in QoS?

To limit the bandwidth of certain applications

To prioritize one class of traffic over another

To provide fair bandwidth allocation among all traffic classes

To drop packets that exceed a specified rate

Which QoS tool is used to mark packets so they can be treated differently by routers along their path?

Policing

Shaping

Marking

Scheduling

What is the role of Weighted Random Early Detection (WRED) in a QoS policy?

To enforce strict priority queuing

To randomly drop lower-priority packets before higher-priority packets

To randomly drop packets before a queue becomes full to prevent congestion

To ensure guaranteed bandwidth for certain traffic classes

Which protocol is often used in conjunction with IntServ to reserve resources across a network?

DSCP (Differentiated Services Code Point)

RSVP (Resource Reservation Protocol)

MPLS (Multiprotocol Label Switching)

RTP (Real-time Transport Protocol)

In QoS, what does the term "latency" refer to?

The amount of time a packet takes to travel from source to destination

The variation in packet arrival times

The rate at which packets are dropped

The average bandwidth used by a flow

Which QoS mechanism is designed to prioritize voice traffic over data traffic?

FIFO (First In, First Out)

WFQ (Weighted Fair Queuing)

LLQ (Low Latency Queuing)

RED (Random Early Detection)

What does the term "congestion avoidance" refer to in QoS?

Techniques to manage traffic when network resources are overutilized

Methods to prioritize one type of traffic over another

Ensuring data packets are delivered in order

Methods to increase overall network bandwidth

In DiffServ, what does the term "PHB" stand for?

Packet Header Bits

Priority Handling Block

Protocol Header Base

Per-Hop Behavior

Which queuing mechanism is designed to prevent low-priority traffic from being completely starved of bandwidth?

Strict Priority Queuing

Weighted Fair Queuing (WFQ)

FIFO (First In, First Out)

LLQ (Low Latency Queuing)

QoS Concepts

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