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Questions tagged [bandwidth]

For questions about bandwidth where bandwidth is the amount of data that can be carried from one point to another in a given time period (usually a second). This tag is suitable when your question is about network congestion, speed, throughput and of course low bandwidth problems.

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17 views

Network Switch automatically sets my pc to 100MF, limiting bandwidth [closed]

I have a network switch between my ISP's Modem and my Windows pc and Linux server. The switch is a tp-link TL-SG105E. My internet speed is around ~100Mbps down and ~8Mbps up. So, for some reason my ...
23
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4answers
10k views

Does physical distance affect download speed?

I just had an argument with a colleague of mine and thought I'd just reach out to the experts on this. Here's the scenario. We were using a website that measures your connection's speed. We tested ...
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1answer
40 views

Why would I need fq_codel? [closed]

I've been studying TC for a while. I came across this answer containing a script. In it we set the egress limit as: # setup bandwidth limiting: tc qdisc add dev "$DEV" root handle 1: tbf ...
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1answer
25 views

What is the maximum data throughput of mobile data on the 800MHz range? [closed]

When it comes to auctioning spectrum licenses, I see that spectrums 10MHz wide seem to fetch higher prices (i.e. in South Africa at least - https://www.biznews.com/sa-investing/2020/12/24/telkom-sues-...
3
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2answers
3k views

Time Division Multiplexing and Transmission Rate

According to my textbook, with TDM, each circuit gets all of the bandwidth periodically during brief intervals of time (that is, during slots). If we have a circuit switched network where each link ...
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0answers
17 views

Why is bandwith-delay product the maximum in-flight datas in TCP? [duplicate]

I have often read, for example https://en.wikipedia.org/wiki/Bandwidth-delay_product that: The result, an amount of data measured in bits (or bytes), is equivalent to the maximum amount of data on ...
4
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1answer
1k views

limit bandwidth on a Cisco switch port,

Our company has a 3/.5 DSL connection. On this connection we have a VPN where the execs are able to access files on the network as well as VOIP. On this connection we also have our exchange email ...
5
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2answers
862 views

Why are there 11 channels in WiFi communication instead of 3?

I'm a little confused about subdividing the WiFi radio band into 11 channels in the USA, 14 in Japan, and 13 in Europe, and to then use just 3 of them because of the overlapping problem. Why didn't ...
3
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1answer
124 views

In 802.11 Wi-Fi, Is it better to be on the same channel as other networks instead of being in an overlapping channel?

While being on the same channel as another network is not ideal, is it better than being on a neighboring overlapping channel because 802.11 specification has methods for dealing with co-channel ...
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0answers
7 views

Why is capacity less than bandwidth [duplicate]

I want to know in detail what is the meaning of capacity of a channel ? In simple but technical terms. Also, For example if the bandwidth of the channel is 100 mbps then why the data rate is less, ...
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2answers
103 views

What's the difference between Channel Capacity and Bandwidth?

The definitions of Channel Capacity and Bandwidth I read are exactly the same, so what's the difference between them/their exact definitions? The Nyquist formula is C = 2 * B * log2 M, so they can't ...
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0answers
14 views

LTE NR split throughput among different bands and carrier

Using a mobile device I can measure the throughput in download and upload while connected to an LTE and/or NR mobile cell. If I know the details of the cells to which the device is connected and so I ...
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2answers
57 views

Bandwidth guarantees in packet switching networks

Are there any mechanisms/techniques to implement bandwidth guarantees in packet switching networks? Thank you!
8
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2answers
983 views

If TCP packets are pre acknowledged, what happens if packets are dropped?

On a VSat link with 800ms RTT latency and 10mbps bandwidth, that means 1MB bandwidth-delay product (data in flight). According to this useful (but closed) Q/A, packets are injected on both sides of ...
1
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0answers
22 views

T_Latency = T_Propagation + T_Transmit + T_Queue? [duplicate]

I am currently learning about the so-called 'physical layer' of a computer network. The following claim is made: The latency of a message is the total time for the whole message to arrive: T_Latency =...
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0answers
10 views

Is there any way to send different data packets together over wireline/wireless link? [duplicate]

I would like to know if there is a technology that allow to send many packets (of different data) together and at the same time over communication link (whether in wireline or wireless networks) of ...
2
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3answers
22k views

Is it better to use channel 13 than channel 11 on 2.4GHz band

When I analyzed the wifi networks in my area, most of them are set on channel 1 and channel 6, so it would be most wise for me to set it on channel 11. My router however, provides the option to set ...
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3answers
2k views

How do I prevent any one user from hogging all the bandwidth?

We upgraded from 20 Mbps to 50 Mbps DIA about two months ago. This required a router upgrade as well. Since then, anyone who starts a large HTTP download - e.g. an ISO, large spreadsheet or log, movie ...
7
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4answers
2k views

Can throughput exceed the bandwidth of a network

I took an introductory course to networking this semester and I was wondering: looking at things at the layer 4 level using TCP can the throughput on the network exceed its bandwidth? According to the ...
1
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2answers
3k views

Why traffic shape/police ingress traffic?

Pardon me for my ignorance. I have not tried QoS nor traffic shaping/policing before. I have been pondering on whether can/why would we want to shape/police ingress traffic if you have no control ...
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2answers
194 views

Network bandwidth management and priority

I'm trying to understand the mechanism by which bandwidth is consumed so that I can set the appropriate QoS and/or priority policies on the firewall. Here's the scenario: Our setup is a Fortigate ...
0
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1answer
443 views

Rate vs Capacity vs Throughput vs Bandwidth

I've already referred to this question & all the answers to this question: Bandwidth vs Throughput vs Data(bit) rate I'm still confused about all the terms especially due to the last paragraph ...
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3answers
4k views

Why is my UDP broadcast wireless communication capped at 1 MB/s?

I am trying to implement Network Coding over a meshed network. Therefore I need to send packets to several destinations, this is way I am using Broadcast packets. But I can not understand why this is ...
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2answers
47 views

Can a fast internet connection compensate for a slow server?

If the sever is bottlenecking at 100kB/s with a bandwidth of A, would it bottleneck at any higher speed with a bandwidth of 2A? In another words, can a fast internet connection compensate for a slow ...
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2answers
198 views

Bandwidth, Latency, Download speed and Upload speed

In the midst of trying to diagnose a slow vpn issue, I'm getting a bit confused by the various metrics being mentioned by the many different techs I've been speaking with. From what I understand, ...
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0answers
24 views

What are the good hardware, software and equipment's suggestions to set up a wireless infrastructure? [closed]

I am working on providing wireless infrastructure suggestions to a client like what software, hardware and equipment will be required to a client in order for them to set up the wireless ...
0
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2answers
36 views

what happend when inbound traffics over the limit of bandwidth? [closed]

Sorry for my English. Let's say there is a chat server in AWS and it has bandwidth limit like 5Gbps. Someday, massive user comes and it spikes a lot of traffic in a second and finally it overs 5Gbps ...
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1answer
27 views

Virtual Circuits in a narrow band network

I know that in a broadband network a virtual circuit is established like in an X.25, frame relay and ATM. Is there a virtual circuit established in narrow band network and if yes then how is it ...
0
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1answer
48 views

Why are download and upload bandwidths different? [closed]

If I take any internet connection speed test (e.g. https://www.speedtest.net/) at home then a report is provided which shows different download and upload speeds. Why is this? How is downstream and ...
2
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3answers
445 views

How do you calculate required uplink on a Switch? [duplicate]

Lets just say i have an access switch with 8 1G port downlink, and all downlink ports are connected to the users. I want to connect said switch to an aggregation switch. How do I determine the ...
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4answers
177 views

why we make each burst of data 2 times the product of bandwidth and delay?

Below is from my textbook: if we need to send data in bursts and wait for the acknowledgment of each burst before sending the next one. To use the maximum capability of the link, we need to make the ...
1
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0answers
45 views

why we need to make the size of our burst 2 times the product of bandwidth and delay? [duplicate]

A textbook which says: The bandwidth-delay product defines the number of bits that can fill the link. This measurement is important if we need to send data in bursts and wait for the acknowledgment ...
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1answer
2k views

Nokia/Alcatel Lucent SAR-8 7705 port utilization

Typically I use the following command to show port utilization percentage: monitor port 1/1/8 rate interval 5 As an example, this would result in the following output every few seconds: ============...
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2answers
56 views

Reconciling multiple definitions of Bandwidth

I am confused about the meaning of the term 'Bandwidth' in a wireless transmission environment. The two most common definitions I could find are: difference between the upper and lower frequencies in ...
2
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2answers
3k views

How does throttling of network traffic work (to limit bandwidth by ISP e.g.)?

I have tried to find the answer on how network throttling works e.g. by ISP when they limit your access to say 100 Mbps. As far as I know TCP/IP itself does not have any mechanisms for that, so it is ...
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1answer
432 views

TCP Bandwidth and delay guarantees

I was wondering if TCP can provide bandwidth and delay guarantees? Or does it have to implemented on the application layer?
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2answers
159 views

How could the line rate of T1 be 1.544 Mbps?

T1 signal is the output of a 24-to-1 digital multiplexer whose inputs are 64 kbps each (plus one framing bit). But a multiplexer is simply an electronic device that selects between several inputs and ...
-1
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1answer
32 views

What would the bandwidth be while transferring from a machine with a 2.5 Gbps NIC to a machine with a 10 Gbps NIC?

I have two machines connected via a managed network switch capable of supporting 10 Gbps bandwidth. What would the bandwidth be if I transfer data from machine 1 with a 2.5 Gbps network card to ...
5
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1answer
182 views

Getting lot of unwanted broadcasts on my network

I am pretty new in Networking (noob), while I was monitoring my network using Wireshark, and I found that there is a lot of broadcasts happening all over the network, broadcast on Local network ...
5
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2answers
18k views

Switch Fabric Capacity vs Forwarding Rate

What is the difference between Switch Fabric Capacity and Forwarding Rate of a switch? Also, what other types of speed or bandwidth are there for switching?
6
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2answers
4k views

Switch Buffer Sizing

What is the relationship between a switches buffer size and the effect it has on latency? I am aware of the bufferbloat issue and understand that buffers that are too large in networks of slower BW (i....
2
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1answer
2k views

Worst-case efficiency of PPP escaping mechanism

Will transferring over PPP data stream containing only reserved bytes 0x7E, 0xFF, 0x03 reduce bandwidth by 50% because of escaping? Then it seems to be very stupid if not say moronic. Such poor ...
1
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1answer
69 views

Link utilization

I have a topology below (two switches S1 and S2), each interface has two metrics (ifinutilization and ifoututilization). %ifinutilization = ( (ifinoctets * 8) * 100 ) / ifspeed %ifoututilization =...
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2answers
2k views

Tx and Rx network metrics

Rx means Receive, and Tx means Transmit. I need to know how can i calculate link utilization (Bandwidth utilization) from these metrics ?, do i need to average them or getting maximum ?
2
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1answer
22k views

How to know the interface utilization on a Cisco switch?

I would like to confirm. Is the above below information in bold sufficient to know the utilization of my interface in percentage? Switch#sho int fa0/8 FastEthernet0/8 is up, line protocol is up (...
0
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1answer
78 views

Monitor individual device traffic on Cisco RV042

I am able to monitor Total Traffic consumption on the Cisco RV042 router using SNMP and PRTG. I want to be able to monitor traffic used by each device on my net
9
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1answer
647 views

What does bandwidth (digital) really mean?

Recently I came across a new kind of NIC capable of 400Gbps (It kind of blew my mind). Does it mean it's electric circuitry is capable of serializing/deserializing (SERDES) 400G bits per second of ...
1
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1answer
27 views

Streaming Online Video from Home: Bandwidth and Provider Restrictions? [closed]

This is merely meant as a thought experiment, because I reckon it's generally a bad idea with regards to scalability, security, etc., BUT: Imagine a person wanted to start streaming videos from his ...
1
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4answers
181 views

does fiber optic transmit data as fast as light?

I dont know where to ask this question. So i think its best suited for networking community. As fiber optic transmit data using light. So we are getting/sending data at the speed of light ?? I did ...
0
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1answer
69 views

Bandwidth limit between CPE and Provider Equipment

I have 4 different WAN links for redundancy one of them is 15mbps MPLS and the other ones are 30mbps Internet , 50 mbps Internet and 10 mbps MPLS , the way that it is set up is that we have load ...