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Questions tagged [data]

For questions about network data, where the payload is the data that is carried on behalf of an application. It is usually of variable length, up to a maximum that is set by the network protocol and sometimes the equipment on the route. Use this tag when your question is about or involving a data transmission or a type of packet sent over a computer network. The structure of a data packet is also on topic.

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What does the speed of Network Switch actually mean?

Network switches usually come in speeds of 10/100/1000 Mbps, and that's all fine and dandy, then I got thinking.. Suppose I have an 8 port 1000 Mbps switch, each port connected to a client. If a ...
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1answer
39 views

What is Throughput/Goodput in Node-to-Node messaging

Upon researching, from my own understanding, throughput is the "measurement of ALL data flowing through a link" and goodput is the "measurement of USEFUL data flowing through a link". Knowing this, ...
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25 views

Does the frame package, all are represent as hex data?

I use Wireshark for capturing packages, get many frames. You see the left light blue background space, all are hex data, and right are converted words we can identify. I mean whether the frame ...
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1answer
130 views

Filter pcap file by layer and save to another format [closed]

I captured packets in wireshark, filtered for the protocol I'm interested in (DIS), then exported this to a pcap file. I'd like to do analysis on this data in Python. The only part I'm interested in ...
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2answers
41 views

Network Packet that allows maximum throughput

I created a basic wireless system between two microcontrollers. Each uses the on-chip UART and an HM-TRP radio module to communicate with each other. Eventually I'll have a master-slave setup where ...
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2answers
69 views

Can a LoRa signal pass through human bodies?

If I want to transfer a packet of data from one LoRa to another up to 1km away, if there's a crowd of people will the signal not get through? If so is there an alternative to LoRa to transfer ...
2
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1answer
361 views

Verifying 802.3 auto negotiation

This is my setup: The Problem The end point, ethernet device B, is powered by the power injector but receives no data. Everything is connected using CAT5 cable. Ethernet device A signifies a GB/s ...
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1answer
49 views

Is it possible for a spy to send 100 Peta Byte of secret data securely online? [closed]

Suppose a spy in an enemy country has got access to 100 or more Peta Byte of top secret data. He wants to pass on the data to his headquarters. But he also wants to make sure that at no cost the data ...
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1answer
212 views

Wireshark - Application Layer with Data

I am not sure if the title is the correct one. When transfering files over the network, in Wireshark, we see abbreviations like: - PK -> Beginning of a file. Is it a compressed file? - OFT2 -> ...
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1answer
44 views

How often does it happen that at the Layer 2 (MAC) an error goes undetected?

I know there are certain error detecting and correcting codes added at the Layer 2. However is it still possible to have errors go undetected eve with the addition of these codes? What type of ...
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1answer
43 views

Structure of 802.11 data field

I can't find a good diagram or anything else, that shows the structure of the data/payload/frame body of a 802.11 paket. Is there also any difference between the protocol version, or do all of them ...
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74 views

High Speed data Transmission [closed]

How does NVIDIA GeForce NOW manage such high and massive data transmission between PC and servers? PS: Please attach relevant articles or journal papers to support your claim.
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2answers
42 views

Differentiate Data or Cable/DSL visitor on a Website

I have a professional issue with this matter, is it technically possible to know if a visitor on my website is connected via mobile data or home/cable/DSL? I got complete IP ranges of all carriers in ...
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2answers
404 views

Extend VLAN over L3 network

I have two sites connected using ipsec, The ipsec is connected using two netscreen boxes and I want to extend VLAN from one site to other Is it possible to achieve that without adding any new ...
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2answers
13k views

Difference between control plane, data plane and management plane?

I think I understand these concepts but I'm a little rusty. Can someone give a concise, easy-to-understand explanation of these concepts? The planes are logical concepts, correct? Is this a cisco only ...
0
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1answer
126 views

what is bandwidth and its relation with bitrate?

Digital signal consists of many sine waves. Now the signal with waves of frequencies 1Mhz to 5Mhz has bandwidth of 5-1 = 4Mhz. Now the fundamental period of this signal is decided by lowest frequency ...
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3answers
3k views

What kind of data can be considered a Payload?

I am taking a networking class, and I understand that payload data is part of a packet (within TCP or UDP), that is actual data that is being sent from the sender to the recipient. However, what kind ...
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2answers
86 views

How first byte is determined when data is encoded via manchester encoding

I'm reading book about networking now and can't understand one thing. As I've read Manchester encoding uses transition of voltage to interpret incoming signal. Question: When I'm sending data via ...
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1answer
386 views

What is persistent connection and session

There is one thing I still cannot understand is persistent connection and sessions. I will explain how I understand all network stuff. Physical layer . This is just voltage levels going through ...
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1answer
112 views

What is the difference (if any) between CSMA/CA and ARQ?

And would an AP wait to transmit if a device were broadcasting to another AP on the same channel, due to CSMA/CA?
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3answers
4k views

When a datagram moves through a network, do the MAC or IP addresses change?

So there are 4 fields I'm considering. Source/destination of each the MAC address and the IP address. If the datagram is going through a few hosts, which of these values will be changing. From what I ...
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3answers
937 views

How fast data travel wirelessly than in metal?

How fast data travel wirelessly than in metal? does both travel in the speed of light?
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2answers
286 views

OSI model encapsulation

I am trying to understand encapsulation of OSI model, in general it is quite clear for me but I have one question. Please look on this picture http://www.just2good.co.uk/images/gif/ethernetFrame.gif ...
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1answer
39 views

VPN connecting offices vs hiding only VPNs (privacy) and their settings

What's actually difference in settings of VPN when it's used e.g. to connect the company's offices around the world with the headquarters and VPN you just connect to hide what you do on the Internet? ...
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1answer
731 views

IP Datagram Fragmentation total length and payload calculations

I do not understand how to fragment a IP datagram. Let's say the original datagram has a total size of 302 (20bytes header and 282 bytes payload). My datagram needs to be fragmented since it goes ...
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2answers
156 views

Circuit-Switched Network

What happens to data being sent into a circuit-switched network when the incoming data rate exceeds the bandwidth of the network?
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53 views

Exclusive responsibility of a DCE

I've read a lot of definitions of DCE and DTE and I'd want to know if data transmission if exclusive responsibility of a DCE.
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1k views

Nexus 5500 FEX Support

This design guide on networkcomputing.com states the following: When uplinking to Nexus 5Ks, one topology option is to dual-home the physical Fabric Extender. Dual-homing a FEX provides path ...