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- A hub is a hardware device used to connect multiple devices to a single network. It serves as a central point of connection, enabling communication between all devices connected to it.
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Jul 20, 2023 · A hub is a networking device that serves as a central connection point within a local area network (LAN). Its primary function is to receive data signals from connected devices and broadcast them to all other connected devices, regardless of the intended recipient.
- How Classic Ethernet Works
- How Network Devices Solve These Problems
- Security Twist 😈
- Conclusion
Before describing the network devices, consider a network without special network devices. That is, a network using classic Ethernet where all computers are attached to a single cable. In this case, if computer A sends a message to another computer, for instance – B, the message is sent over the shared cable, and all devices receive it. Can you thi...
What is a Hub?
One device that solves only the extensibility issue is called a Hub. A hub is a device with multiple ports that single Ethernet cables are connected to: So now, instead of having one cable with multiple ports with many computers attached to it, we have instead a single hub, and each computer is connected to it via a single cable. This makes the I.T. person's life much easier. The hub simply takes the pulse it receives and multiplies it – that is, sends it to all other ports. For example, if A...
What is a Switch?
If all the stations are connected via a switch, and A sends a frame to B, only B receives it. Notice that this means that all issues are indeed solved. The devices won’t be overloaded as every frame will get only to the relevant recipients. There are no privacy issues since, apart from the switch, only A and B see the frame. The network is easily extensible by plugging additional switches if needed. The switch can avoid collisions as every connection between a switch and an endpoint is a sing...
Interim Summary
So far you learned about two network devices. First, a hub, which is basically a first layer device. That is, it only transmits bits from one port to other ports, without understanding any protocols. Second, you got to know a second layer network device, namely a switch, which already "understands" the Ethernet protocol and MAC addresses. It uses that knowledge in order to transfer frames only to relevant ports, at least once it knows the network.
Now that you understand how hubs and switches work under the hood, it's time to consider their security implications. Assume that I am connected to a certain Ethernet segment, and you run on computer A. B sends a message to C. Is it possible for you to see that message? In case the computers are connected via a hub, you certainly will see the messa...
In this post you learned about two important network devices, a hub and a switch. You learned that a hub simply multiplies the bitstream it receives to all ports other than the port that received the bitstream, whereas a switch forwards the frame only to the right port (once it has learned the network). You also learned how switches are able to ach...
Mar 25, 2022 · A hub is a network device that connects various network nodes, e.g. in an Ethernet, in a star configuration. In the OSI (Open Systems Interconnections) reference model, hubs are classified as level 1 devices that operate at the physical layer.
Mar 1, 2024 · A hub is a hardware device used at the physical layer to connect multiple devices in the network. Hubs are widely used to connect LANs. A hub has multiple ports. Unlike a switch, a hub cannot filter the data, i.e. it cannot identify the destination of the packet, So it broadcasts or sends the message to each port.
Jun 24, 2022 · A hub is a small, rectangular, inexpensive device that joins multiple network-enabled devices. They're often made of plastic and receive power from an ordinary wall outlet. The purpose of a hub is to form a single network segment on which all devices can communicate directly with each other.
- Bradley Mitchell
A network hub is a node that broadcasts data to every computer or Ethernet-based device connected to it. A hub is less sophisticated than a switch, the latter of which can isolate data transmissions to specific devices. Network hubs are best suited for small, simple local area network environments.
A hub is a networking device that serves as a central point for connecting multiple devices in a local area network (LAN). Its primary function is to facilitate communication among these devices by receiving data from one device and then broadcasting it to all other connected devices.
