Exam 200-301 topic 1 question 546 discussion

answer should be B. to provide fair queuing for buffered flows traffic shaping is not necessarily doing limitation of bandwidth

Answer D seems correct. Explanation: Traffic shaping is a bandwidth control technique. It is used on computer networks and delays some or all datagrams. Traffic shaping is created to comply with a specified traffic profile. Traffic shaping maximizes or guarantees performance, boosts latency. It can also increase available bandwidth for certain kinds of packets. Application-based traffic shaping is the most common form of traffic shaping.

The purpose of traffic shaping can align with several of the options you've provided, but the most directly related answer is: D. to limit the bandwidth that a flow can use. Traffic shaping specifically focuses on controlling and managing the amount of bandwidth each flow can utilize, thereby optimizing overall network performance and preventing congestion. While options A, B, and C touch upon aspects of network management and performance, they don't capture the primary aim of traffic shaping as effectively as option D.

D is correct Limiting the bandwidth that a flow can use. This is centrally important to preventing bandwidth hogging by some applications use at the expense of others.

i picked D,......B is partially correct on the fair queuing part but its not the main function of traffic shaping, so its not the best answer

Shaping does queue packets, as a means of slowing down their egress rate, but it does not "provide fair queueing" - this is done by a separate queueing mechanism, such as CBWFQ or LLQ. From the OCG "You have a 1-Gbps link from a router into a SP, but a 200-Mbps CIR for traffic to another site, as seen in Figure 11-19. The SP has told you that it always discards incoming traffic that exceeds the CIR. The solution? Use a shaper to slow down the traffic—in this case to a 200-Mbps shaping rate."

B and D two of them make sense but I will go with D

Shaping affect the que

The purpose of traffic shaping is to control the rate of data transmission for a specific flow or type of traffic. It allows network administrators to limit the bandwidth that a flow can consume, preventing it from exceeding a certain rate and helping to manage network congestion and ensure fair distribution of resources. Traffic shaping can be used to control the flow of data over slower links, prioritize critical traffic, and prevent certain flows from overwhelming the network.

Answer D

I think is B

Traffic shaping retains excess packets in a queue and then schedules the excess for later transmission over increments of time

From the link that two people have posted even though they believe the answer is B: Using traffic shaping, you can control access to available bandwidth, ensure that traffic conforms to the policies established for it, and regulate the flow of traffic in order to avoid congestion that can occur when the egress traffic exceeds the access speed of its remote, target interface. For example, you can control access to the bandwidth when policy dictates that the rate of a given interface should not, on average, exceed a certain rate even though the access rate exceeds the speed. From this I am gathering that the answer is D. Also note that "fair queuing" is not the same as "queuing", just because you see the word queue does not mean that it is "fair queuing".

D IS THE PURPOSE, B IS THE METHOD.

Seems to me it should be B

B is correct answer Traffic shapingregulatesandsmoothsoutthepacketflowby imposinga maximumtraffic rateforeachport'segressqueue.Packetsthatexceedthethresholdareplacedin thequeueandaretransmittedlater. Thisprocessis similarto traffic policing;however, thepacketsarenotdropped.Becausepacketsarebuffered,trafficshapingminimizespacketloss(basedon thequeuelength),whichprovidesa bettertraffic behaviorforTCPtraffic chrome-extension://oemmndcbldboiebfnladdacbdfmadadm/https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus3000/sw/qos/7x/b_3k_QoS_Config_7x/b_3k_QoS_Config_7x_chapter_0100.pdf

Ans. is D: "to limit the bandwidth that a flow can use". Shaping is applied to flows that receive preferential treatment using LLQ. However, LLQs may result in flows which utilizes more BW than the committed BW over the link (e.g. to ISP). At the other side (ISP) packets can be dropped due to exceeding BW limits (Policing). Hence, to avoid packets dropping by policers at the other end we limit BW from the exit side (Shaping). Of course, shaping results in other less prioritised flows getting higher BW, so some tend to choose B. However, this is not the intention of Shaping as we could have applied fair queuing from the beginning.