ethernet's questions - English 1answer

631 ethernet questions.

When a Gigabit network adapter is receiving data, how is it receiving the bits? Is it seeing it all in one stream of 0's and 1's? Or is there somehow multiple streams of 0's and 1's coming in at the ...

Ohai guys. I have a question regarding a setup and as a fresh trainee I am having problems since there is barely any information on the internet let alone a similar case. The current setup: 2 ...

I have a query on how to compute round trip delay. I know it is 2 times the propagation time, but let's say I have a packet of 100 bits and a transmission speed of 2 Gbit/sec, how do I compute the ...

I am extending a home computer network about 120 feet to a workshop. The 110v, three phase power will also be run as well. There will be about a 4” separation going through the foundation. Separate ...

I don't know if this is the correct place to ask, but here i go. We live with 10 people in 10 rooms in a 3 floor student house. Every room has an ethernet connection. When I do a speedtest I get an ...

I just upgraded my fiber internet from 50Mbps to 100Mbps for download. But then found out that most of my devices are not able to reach the full speed. I used CAT 6 Ethernet cable to connect a desktop ...

There are a couple of steps I don't understand about what happens on a low level when I hook up two computers directly to each other, via an Ethernet cable, when neither has Internet access. It seems ...

Installed 70m cat6 cable with fiber! But it did not reach the maximum speed, I suppose to get 300 mp”/ but i get only 100 mega bit , i spoke with the provider company they said because of the length ...

We're developing a system based on a Xilinx Zynq 7000 FPGA/Cortex A9 ARM SoC. The device has a hard gigabit MAC which connects to the ARM core, but it is also possible to implement a MAC in the FPGA ...

Let's say one node detected a collision at t=0, in B Mbps ethernet, how long will that node wait before sensing the channel again?

How can 1000-BaseT (Gigabit ethernet twisted copper pairs) technology transmit over the Rx pins & receive over the Tx pins? It's baseband technology (hence the name), right? Discrete digital ...

First of all, I am not a network engineer, and my knowledge of physical network installations is quite limited ( I am a programmer ) , so please excuse me if my question is too trivial / naive / ...

I'm confused with some concepts please help me out, Data link layer manage flow control hop to hop. Flow control requires acknowledgement receiving but If we observe data link layer header, it does ...

Theoretically, is it possible to access the internet through a browser without connecting to an ethernet cable or using WIFI?

We have a device in work, in the manual it says connect via a switch. Obviously it works fine with any other device, once it is connected via a switch. But say in a topology, it could be directly ...

I would assume that the primary difference between 10base-t vs 100base-t is the speed of the clocks interpreting the electrical signal. In other words, if you ensure that a "bit" is transmitted in 1 ...

I know the CAM table in a switch holds MAC addresses and the ports that are associated with the respective MAC addresses. There are no such thing as CAM addresses from my knowledge, so why is it ...

I wonder what can cause the first line output of the command show interfaces to be: FastEthernet is up, line protocol is down. In other words, Is the cable that is connected to the local interface, ...

I'm looking at setting up a network with full WiFi coverage. Right now I'm still comparing access points to mesh. I see the options for AC access points offer wireless bandwidth in excess of 1Gbps. ...

Ethernet padding value

2 answers, 806 views ethernet
When the data sent in an Ethernet frame is less than 46 bytes, extra padding needs to be added to the payload. The question is: Which is the value of that Ethernet padding? I'm asking since in real ...

I have to set up our network in our new office. I'm no networking expert (developer), but I need some input and advice here for some things I wonder about. I have purchased the following: 2 x Cisco ...

I have two Wi-Fi modules (Moxa AWK 3131) from MOXA. I am trying to set up these two modules in such a way that they can talk to each other. I have connected them as follows, I have configured the ...

We have some devices connected together through a switch. We need to access them through another network, but because of IP counts limitation we cant get IP from that network. Q: How to access my ...

The purpose of such a variable power over Ethernet supply would be to test network equipment that are receiving power over PoE under condition of conditions of low voltage or current and determining ...

Ethernet padding

2 answers, 2.011 views ethernet wireshark ping icmp
I'm using Wireshark for my project. I sent a ping over to Google.com and Wireshark said that the length was 57 bytes(when I received the reply it was 60 bytes long and it contained 6 bits of padding. ...

I want to create a network in my work 4 floors 50m2*4 workplace. Requirements are simple: Share internet ( < 20mb/s ADSL) while blocking someone from abusing download speed for long period. (...

All: Have an testbed configuration where we're running 24 servers with Intel XL710DA1 40G NIC into a switch with 40/100G ports. Trying to use DACs to hold the cost down, but parsing the specs for ...

Got a doubt while studying about LLC layer. From Network layer I came to know that IP fragmentation will be done, For L4 TCP will segment the data. Here, the question is Protocols starting from Layer-...

In a given Ethernet frame containing the HTTP GET message can we tell apart whether the MAC address of the destination is of a router or end host? The link to ethernet-ethereal trace :: https://drive....

A cable plugged into a switch but unconnected on the other end, might lead to any problem in a "noisy" environment (industrial)? It's short, 50 cm, but there are motors, inverters, power supplies ...

I'm a newbie to networking and I wonder what are the reasons for ADSL to use ATM instead of Ethernet ?

Is there something like "technology independent" PHYs? To add the context as Zac67 correctly mentioned, I was reading clause 73 of 802.3-2015. 73.3 - Functional specifications. Excerpt: "The Auto-...

There's no doubt the vast majority of Ethernet frames are transporting IP packets. I know there are various other protocols that can be transported over Ethernet as well, but those can be transported ...

Don't think it's a duplicate. I've searched really many articles and couldn't find the satisfying answer. I understand : how ARP works MAC address is an unique address for each NIC IP is network ...

How would a network behave if one were to set the source address of an Ethernet frame to the broadcast address FF:FF:FF:FF:FF:FF? Obviously, one would have to manually alter the relevant field in the ...

I understand the number in the naming convention. The number represents how many Megabits per second can the standard support. However, I do not understand the rest of the naming convention. What do "...

I am new to networking, know about Ethernet and that Ethernet cables exist to make a wired networks. I also know about fiber optic cables which have a glass like material inside and transmit light ...

I know about different LAN topologies(like star, bus, ring,...) and that Ethernet is one of the ways to practically implement wired LANs. I wonder what other technologies exist to make LANs? And, is ...

According to IEEE 802.1X-2010 the standard for defining MACSec Key agreement protocol Clause 9.6, that's how the key-server decides to use MACSec or no. Each participant advertises whether it is ...

I am trying to wrap my head around MACSec Key agreement protocol (MKA) and its relation with MACSec and other protocols. So bear with me. To my understanding in order to MACSec to work, all nodes ...

I understand that most ports that support SFP+ transceivers can step down to allow an SFP to be plugged into it, but my question is around the transceivers/optics themselves. Can an SFP+ transceiver ...

I have a 1Mb/s link each user uses 100Kb/s when active. With 10 user active 10% of the time, I can have 10 users in a circuit switched environment. Packet switching with 35 users, probability > 10 ...

Over (Software defined network) what will happen when unknown Ethernet hits the first switch, using 4 OF switch and 8 host.

In normal network with Cisco 3650 (1Gbps) and Linux base servers, the ping time is between 0.150ms to 0.250ms. (I also mean using ping or ICMP is to refer to all protocols) I want to know is there ...

I’m working through questions from computer networking top down approach and was hoping to get some clarity on the end-to-end delay calculation. At this stage we are not considering processing, ...

So basically do the modern routers in the internet still use 1500 as the MTU of Ethernet? or the 1500 Byte was for the old days? What I'm asking here is what is the MTU of Ethernet in modern Networks?...

I have a client who has been experiencing a significant amount of performance issues in regards to their telemarketing floor. On my initial assessment, I found that where the ethernet is punched down, ...

I know that cable connection (DSL) is asymmetric, there is a certain bandwidth on the channel, and for a better user experience, they allocate a bigger portion to the downstream. I suppose Ethernet ...

Is there any specific calculation that that was done to arrive at this number, and what were the factors that were taken into consideration for that calculation.

Recently I purchased CAT6 cable with a length of 150 meter. I bought another CAT6 with a length of 148 meter. I joined both the cables using RJ45 cable coupler. I tested it using LAN TESTER, and ...

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