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Question 52

What is used to perform QoS packet classification?

    Correct Answer: C

    The ToS (Type of Service) field in the Layer 3 header is used for Quality of Service (QoS) packet classification. This field allows network devices to identify and prioritize packets based on their priority or required level of service. By marking packets in the ToS field, routers and switches can distinguish between different types of traffic and apply specific handling procedures to ensure that critical applications receive the necessary network resources and performance.

Discussion
youtriOption: C

when we talk about PACKET, means layer 3

ciscolessonsOption: C

TOS is L3, COS is L2.

danny_fOption: C

Agreed, DSCP is used for marking, within the TOS which is in the IP header

LanreDipeoluOption: C

"C" is the correct answer: ToS is an eight bit field, comprising of 3-bit IP Precedence (IPP) used for marking and the rest bits unused. This filed has been redefined as 8-bits Differentiated Service (DiffServ) for both IPv4 and IPv6 class fields for backward compatible with IPP

techrieseOption: C

C is correct

Pudu_vladOption: C

C is correct

NhanOption: C

Type of service

SeMo0o0oOption: C

C is correct The TOS field is used to mark packets with different levels of priority or QoS treatment. This field allows routers and switches to prioritize traffic based on the specified service level.

SeMo0o0o

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