Exam N10-008 topic 1 question 255 discussion

The issue of pixelated images in a training video is likely related to a problem with bandwidth, not with jitter, latency, or giants. Bandwidth refers to the amount of data that can be transmitted over a network connection in a given amount of time. When multiple users are trying to access the same resource, such as a video file, the available bandwidth may become congested. This can cause the video stream to be interrupted or delayed, resulting in pixelated images or other video artifacts. Jitter is a variation in the delay of packet delivery over a network, which can cause audio or video to be distorted or choppy. This is unlikely to be the cause of the issue in this scenario, as pixelation is typically related to bandwidth rather than jitter.

B. Bandwidth Jitter can also cause pixelation, but in the scenario described, bandwidth limitation is a more likely cause since the administrator did not find any immediate cause when reviewing the core switch. Tricky one ;)

I believe the answer is B. Bandwidth. The only reason for my lack of certainty is the grammar. Bandwidth is... occurring? Really CompTIA?

If you look at a pixelated video and think "Ah Bandwidth is occurring." Then you need to put Network+ to one side and do a course that covers reading comprehension, spelling, punctuation & grammer. Pixelated images while trying to watch a video is an example of jitter occurring as a result of bandwidth limitations. Bandwidth is not occurring, grammatically, bandwidth cannot occur. If you are lagging in a Voice/Video call you say "Ah, sorry guys I'm lagging/jittering at the moment", not "It would appear that I am bandwidthing at present." For the answer to be B the question would have to read "Which of the following BEST explains the cause of this issue." It doesn't ask that, it simply asks you to identify the issue, the answer is A. TLDR; Bandwidth is a noun and Jitter is a verb. Jitter is a "action, state or occurrence" that can occur.

The correct answer is jitter This refers to fluctuations in the delay of data packets reaching their destination. In the context of video streaming, jitter disrupts the smooth, consistent flow of data, leading to brief freezes, buffering, and pixelation, While insufficient bandwidth can contribute to video quality issues like buffering, it generally manifests as slow loading or stalling, not pixelation

I think taking this part of the question "SEVERAL end users viewing a training VIDEO" we could say right answer is Bandwidth

I'm trying to think of this semantically. The question is "Which of the following BEST explains what is occurring?" Does bandwidth occur or does jitter occur? I would say that jitter is what is occurring and bandwidth (or lack of) is the cause.

Several end users viewing a training video report seeing pixelated images while watching. Which of the following BEST explains what is occurring? What is "occurring" here is Jitter in my opinion.

While bandwidth can affect the overall quality of video playback, it is not directly responsible for pixelated images. Bandwidth refers to the maximum data transfer rate of a network, which determines how much data can be transferred per unit of time. If the bandwidth is insufficient to handle the amount of data required for the video stream, it can cause buffering, delays, or even dropped frames. However, pixelated images are specifically caused by jitter, which is the variation in the delay of data packets. This variation can disrupt the smooth playback of the video, causing the image to appear pixelated or jerky. Jitter occurs when there is a time delay during data packet transmission over a network connection. High levels of jitter issue during signal transmission may cause pixels to be altered or distorted, resulting in blurry images, lowered brightness, or inaccurate colors.

For example, if the network bandwidth is low, the player can switch to a lower resolution or bitrate version, and vice versa. This way, the video quality can be optimized for the available bandwidth, without causing buffering or stuttering. Bad latency causes time delay that would cause jitter, low bandwidth speeds represents ideal transfer rate.

The issue described, where several end users are seeing pixelated images while watching a training video, is most likely related to B. Bandwidth. Pixelation in a video stream often occurs when there is insufficient available bandwidth to transmit the video data. When there is not enough bandwidth, the video stream may be compressed or degraded, leading to lower quality, pixelated images. Jitter (A) refers to variations in packet delay and wouldn't directly cause pixelation. Latency (C) is the delay in transmitting data and may lead to buffering or synchronization issues but not pixelation. Giants (D) typically refer to unusually large Ethernet frames and are more related to network errors and not the direct cause of pixelation in a video stream.

If there isn't enough available bandwidth to support the video quality being streamed to multiple users, the video may become pixelated. This can happen if the network link or the server's upload speed is insufficient.

Pixelated images while watching a video often indicate that the available bandwidth for transmitting the video stream is insufficient to maintain a high-quality, smooth playback. Bandwidth refers to the amount of data that can be transmitted over a network in a given time period. When there is not enough bandwidth available, the video stream may be compressed or downgraded, resulting in pixelation and reduced visual quality for the viewers. Jitter refers to the variation in the delay of received packets in a network. While jitter can impact the quality of real-time applications like video streaming, it typically causes issues such as audio or video synchronization problems rather than pixelation. Jitter could lead to audio and video being out of sync, but it's less likely to directly cause pixelated images in a video stream.

A. Jitter. Page 285 - Jitter is defined as being a variation in the delay. Jitter manifests itself as an inconsistent rate of packet delivery. Latency and jitter are not significant problems when data transfer is bursty, but real-time applications are much more sensitive to their effects because they manifest as echo, delay, and video slow down. If packets are delayed, arrive out of sequence, or are lost, then the receiving host must buffer received packets until the delayed packets are received. ***If packet loss or delay is so excessive that the buffer is exhausted, then noticeable audio or video problems (artifacts) are experienced by users.***

A, think of pixels and bad quality as jitter. this is not bandwidth it's a trick question. think of the key words video, pixel, and image which all refer to jitter

B. Bandwidth .

Try watching automatic resolution video on youtube and turn on qos mode on your router limiting bandwith to devices connected, it might auto choose 240p quality on your device which is they call now minecraft face.