Difference Between Hub and Modem

We have complimentary equipment like hubs and modems in most modern houses, with two or more computers and Internet connections, which usually don’t communicate with but assist to maintain the network. Hubs transmit data efficiently to all ports; therefore, the hubs are mostly a repeater multi-port. Modems are physical devices that allow the Internet to be connected to a computer or other devices like a router or a switch. It transforms or modifies an analog signal to digital data (1s and 0s), recognized by the computer, from a telephone or cable line.

Hub vs Modem

The main difference between Hub and Modem is that basically if you wish to link two or more computers, a hub is used. A hub is an interface between your computers and a modem because it allows your computers to communicate to the modem and to connect to the Internet whereas, A modem is what enables us to connect to the internet and a modem may be used as frequently as a single computer.

Hub vs Modem

Hubs are networking devices used to link numerous devices in a network using a physical layer of the OSI architecture. Generally, they are used for LAN connecting PCs. There’s a hub with many ports. One of those ports is linked to a computer that wants to be connected to the network. When the data frame reaches a port, it is broadcast to any port, regardless of whether or not it is intended for a specific target device.

A modem transforms data into a signal that may be readily sent and received via phone or satellite. Put another way, it translates digital data from your computer into analog signals that can be transferred over cables, and it can also translate incoming analog signals into digital data that your computer can comprehend.

Comparison Table Between Hub and Modem

Parameters of ComparisonHubModem
DefinitionHubs are networking devices that connect several devices in a network.A modem converts digital data into analog-digital signals that can be transmitted over wires.
UsageA hub can be used to link a network of personal computers.A modem connects a computer or other instrument to the internet, for example to a router or to a switch.
LayerThe Physical Layer.The Data Link Layer.
Transmission ModeThe transmission mode for a hub is Half Duplex.The transmission mode for a Modem is Full Duplex.
SpeedThe maximum speed of a Hub is 10Mbps.The maximum speed of a Modem is 56.6Kbps.

What is Hub?

A hub is a virtual networking device that connects a network’s numerous PCs or other network devices. Unlike a switch or router, a network hub lacks routing tables or intelligence for choosing where data should be sent instead of broadcasting all network traffic over each channel. Although most hubs can detect minor network issues such as collisions, broadcasting all data to many ports is a security risk and causes congestion. Because they were less costly than a switch or router, network hubs were previously standard.

Hub is used to link LAN segments. If a packet reaches a single port, it gets duplicated to all other ports stored in the hub. Although most hubs can detect network problems or collisions, all of the information transmitted to the different ports might pose a security risk and cause bottlenecks. The network hub was popular in the past since it was cheaper than a switch or router.

The hubs function as a primary link between all network equipment and handle data known as frames. When the frame is received, it is transferred after amplification to the port of the target computer. A frame will be passed in the hub to each port if it is for one port alone.

What is Modem?

Modem or “Modulator-Demodulator,” is a component of hardware that permits an Internet-based computer or another device like a router or switch. It transforms or modifies an analog signal to the digital data (1s and 0s), which a computer can detect from a telephone or cable connection. Similarly, digital data may be sent through conventional telephone lines from a computer or other device into an Analog Signal.

The early modems were “wired,” thus a telephone number was needed to be dialed to connect to an ISP. The modems utilized the same rates as telephone calls, limiting the maximum data transfer rate to 56 Kbps through conventional analog telephone lines. Computer modems also needed full use of the local telephone line, disrupting the Internet connection through voice calls.

A modem’s speed is calculated by the amount of data it can send in a given period. This period is in bits per second (bps). Another method to define modem speed is to count the number of times a modem sends a new signal in a given period as the number of times the signal state changes in a unit of time. This method is known as the symbol rate, whose unit is baud units (Bd).

Main Differences Between Hub and Modem

  1. Hubs are networking devices that connect several devices in a network whereas, a modem converts digital data from your computer into analog signals that can be transmitted over wires.
  2. A hub can be used to link a network of personal computers whereas, a modem is used to connect a computer or another device, such as a router or switch, to the internet.
  3. Hub works on the Physical Layer whereas, a Modem works on the Data Link Layer.
  4. The transmission mode for a hub is Half Duplex whereas, the transmission mode of a Modem is Full Duplex.
  5. The maximum speed of a Hub is 10Mbps whereas, the maximum speed of a Router is 56.6Kbps.


In most modern houses with two or more computers and an internet connection, we complement equipment like hubs and modems that we seldom deal with but serve to keep the network running. Modems are needed to connect to the internet, whereas hubs come in handy in Local Area Networks. Hubs are connected devices, but some modems are wireless. Many modems include built-in hubs. A modem is an interface between a digital and analog network, whereas a hub is entirely digital. In today’s environment, every home must have a Modem or a Hub.

Furthermore, the modem provides some security for your devices that are directly exposed to the Internet. All the traffic from your residence on the Internet seems like it comes from a single device. With a single router, you can’t connect straight to the Internet. A router needs to be connected to a device that can transport your digital traffic on whatever sort of Internet connection you have and that device is the modem.


  1. https://ieeexplore.ieee.org/abstract/document/7357439/
  2. https://ieeexplore.ieee.org/abstract/document/8784279/
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