What is a Modem and Router? Difference between Modem and Router

What is a Modem and Router? Difference between Modem and Router

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               How are you, friends? I hope you are well. Today you’ll know, “what is a modem and router? Difference between modem and router”. After reading the entire article, you will know what is a modem router.  And also get the idea of what to look before buying the best modem router.

               Through the internet, you do different kinds of work like DTH recharge, mobile recharge, email, online shopping, electricity bill payment, and many more. 

So let’s find out,  What is a modem and router and how it works.

What is a modem and router? 


 What is a Router?  

            In this article,  help you to know about the router meaning or what is router in networking and how it works.

               A router is networking hardware which called a computer networking device. This computer networking device communicates between the internet and the devices in your home or office that connect to the internet.        

               A router is an electronic device or external hardware that connects different computer networks. The router can do this through wired or wireless connections. A router is a fastest and most well-organized way to direct incoming and outgoing internet traffic on personal computers, tablets, smartphones, printers, TVs, and many more.

              Wireless routers can connect different computer networks. Therefore, another name of these devices is “WiFi router” or wireless router. 

On the other hand, a router can forward or sent the Internet data from one network to other computer networks.

Similarly, the router also allows other computer networks to receive “internet connectivity” from a particular “internet-connected computer network.”

              The first model of this networking device called Router was developed in 1984.

               To transmit Internet data or traffic to other computers through a router, the router must first be connected to a modem itself.

 What are the different types of routers? – (Types of Router)

           There are many types of routers. Below I am discussing with you about some of the popular types of router.

1.        Broadband Routers (Wired Routers)

2. Wireless Routers (WiFi routers)

3. Core Routers

4. Edge Routers

5. Inter Provider Border Routers

6.        Pocket router

 Let’s know a little bit about each type of router and how it works.

 1. Broadband Routers (wired routers)

           These types of Routers are using for to connect two or more computers over the Internet which gives you high-speed internet.

           Broadband Routers receive Internet service from a modem through a wired connection and then allow other devices in your home or office to connect to the Internet connection. This is the best wired router for small businesses.

 2. Wireless routers (WiFi routers)

            At present, wireless routers are the most used and demanding device. Most of these wireless routers are using in our home or office. These wireless routers allow a computer to connect to another computer without a wire and receive Internet access.

            These types of routers create a defined area of a wireless signal. From this designated area, a computer, mobile, laptop, etc. can connect to the wireless signal to access the Internet without any wire.

           For security reasons, these types of WiFi routers use passwords. So, if other computers or mobiles within your WiFi network area or zone will trying to connect to the Internet they are can’t connecting without your permission.

 3. Core routers

           Core routers are using to connect differently distributed routers in different locations and it makes up the backbone of the Internet with these types of routers. 

           For example, suppose a company has 10 routers in different places. These routers now act as the backbone of the Lane network to connect those 10 different location routers.

What is a modem and router?  

 4.  Edge routers

           These types of routers are placing next to the internet service provider or ISP. Configure external protocols such as border gateway protocol (BGP) with other ISP’s BGP. These routers are also called an “access router,” which resides in the middle of the network.

 5.  Interprovide border routers

            Do you know what ISP means? ISP means “Internet service provider”.

           For example, Airtel, Reliance, Jio, Idea, BSNL, etc. through which you can use the Internet on your mobile or computer. Inter-provider border routers use to inter-connect these types of ISPs.

6. Pocket router

What is a pocket router? What are the advantages of a pocket router?

           Pocket routers are also called portable WiFi routers. These types of pocket WiFi routers are much smaller than ordinary WiFi routers.

           Pocket routers are portable. So you need to use a WiFi connection to connect to the Internet. It is so small that you can carry it in your pocket and use it from anywhere.

           A pocket router or portable router uses as a SIM card to provide an internet connection. And, whenever you turn on your router from anywhere, you can access the Internet on multiple devices via WiFi connection.

           Pocket routers or portable routers can use with the same charge as mobile phones. In some cases, pocket routers are also called travel routers.

           After knowing what a pocket router or WiFi router is or what it means, let’s know about some of the advantages and benefits of a pocket router.

What are the advantages of a pocket router?

           There is nothing special about the advantages of Pocket Router. However, the two or three advantages are far greater. You can carry your router in your pocket at any time.

            You can use the internet through the router at any time. Pocket portable routers find in a little cheaper than other routers. And a SIM card uses to create an “internet hotspot” or “internet access point”.

           Anytime you use the internet from your internet access point, your connection is always secure. So, these are the advantages and disadvantages of a pocket router.

 Why use a Router?         

           Suppose, you are accessing and using the Internet directly from your modem on the main computer in your office.

           Now if you want to connect other computers or mobiles of the office with the internet received through that modem, then in this case you have to use a Router.

What is a Modem?


            The full form of the modem is “Modulator / Demodulator.” It is a hardware part that allows a computer or other devices, such as a router or switch, to connect to the Internet. It converts or “modulates” an analog signal from a telephone or cable wire to a digital signal that a computer can easily recognize.  

           Similarly, it converts outgoing digital data into analog signals on a computer or other device.

           In 1962, the first commercial modem was manufactured and sold by AT&T as the Bell 103.  

           Earlier, modems used to be “dial-up,” They had to dial a phone number to connect with the ISP. These modems operate in standard analog phone lines and also use the same frequencies as telephone calls, which limits their data transfer rate to a maximum of 56 Kbps.

           Dial-up modems require full bandwidth of the local telephone line, which means that voice calls can interrupt your internet connection.

            Modern modems are typically DSL and cable modems. Which are also called “broadband” devices. DSL modems operate over standard telephone lines,

           But using a wider frequency range allows for higher data transfer rates if compared with dial-up modems and also does not interfere with phone calls.

            Cable modems send and receive data on standard cable television lines, which are typically coaxial cables only.  

           Most modern cable modems support DOCSIS (Data over Cable Service Interface Specification), which provides an efficient way to easily transmit TV, cable Internet, and digital phone signals into the same cable line.

What are the different types of modem? (Types of Modem)

           There are many types of modems. Let them know their categorization bases:

            1. Directional capacity: half-duplex modem and full-duplex modem.

            2. Connection to the line: 2-wire modem and 4-wire modem.

            3. Transmission mode: asynchronous modem and synchronous modem.

Directional capacity: half-duplex modem and full-duplex modem.


1. A half-duplex modem permits transmission in only one direction at the same time.

2. If a carrier is detected by a modem in the line, then it gives a signal to the incoming carrier to DTE which is done in its digital interface via a control signal.

3. Modems do not permit DTE to transmit data until they get that signal.

           Since the CB protocol only supports half-duplex communication, only one person can talk at a time. This is why people who communicate in two-way radios often say “over” after their statement. This is an easy way to tell the recipient that they can now respond.

For example:

           CB (citizens band) radio is an example of a half-duplex device. It allows users to communicate back and forth with a specific radiofrequency. CB protocol is used by truckers, police officers, and other mobile personnel. while

 Full duplex

1. A full-duplex modem allows simultaneous transmission in both directions at the same time.

2. So it has two carriers in line, one outgoing and the other incoming.

For an example of Full duplex :

           Telephones and cell phones are the best examples of full-duplex communication. In Full Duplex, the transmitter and receiver can transmit and receive information to each other at the same time.

When the first device transmits the signal, the second device can also receive it and transmit it simultaneously as well. Thus both devices can have transmission and receive simultaneously.

Connection to the line: 2-wire modem & 4-wire modem.

            In the transmission medium, the line interface of these modems can be either a 2-wire connection or a 4-wire connection.

2-wire Modem

            1. 2-wire modems use the same pair of wires for outgoing and incoming carriers.

            2. A leased 2-wire connection is often cheaper than a 4-wire connection as only one pair of wires is extended to the subscriber’s premises.

            3. The data connection which is established through Telephone Exchange is also a 2-wire connection.

           4. In these 2-wire modems, the transmission of half-duplex mode which uses the same frequency in both incoming and outgoing carriers can be easily implemented here.

            5. But for the full-duplex mode of operation, it is necessary to have two transmission channels, one for the transmit direction and the other for the receive direction.

            6. This is achieved by frequency division multiplexing of both different carrier frequencies. These carriers are kept within the speech channel’s bandwidth.

 4-wire Modem

            1. In a 4-wire connection, one pair of wires is using in the outgoing carrier while the other pair is used in the incoming carrier.

            2. Data transmission of full-duplex and half-duplex modes is possible in this 4-wire connection.

            3. As the physical transmission path is different for each direction, in this case the same carrier frequency uses in both directions.

Transmission mode: asynchronous modem and synchronous modem.

 Asynchronous modem

1. Asynchronous modems can easily handle data bytes with the help of start and stop bits.

2. There is no separate timing signal between the modem and DTE.

3. In this, the internal timing pulses are synchronized repeatedly with the leading edge of the Start Pulse.

 Synchronous modem

1. Synchronous modems can easily control a continuous stream of data bits but they require a clock signal.

2. The data bits in it are always synchronized with the clock signal.

3. It consists of separate clocks for data bits that are transmitted and received.

4. For synchronous transmission of data bits, DTE is given the same as its internal clock and supply in the modem.

What is a modem and router?  

What does a modem do?

            We know that Modem has a full form Modulator – Demodulator.  

           If you know about what a modem does on a computer. Modems are using to transfer data from one computer network to another computer network.  

           In this case, data transfer is done by telephone lines. Although the computer network works in digital mode, analog technology is used to send messages across the phone lines.

            The modulator converts the information from digital mode to analog mode at the transmitting end and the same demodulator converts the same information from analog mode to digital mode at the receiving end.

             Digitizing is the process in which analog signals from one computer network are converted into digital signals from another computer network.

            When an analog facility is using between two digital devices for data communication then they are calling Data Terminal Equipment (DTE).

In such a situation, DTE can be either a terminal or a computer.

            The modem is transmitting end converts the digital signal generate by DTE into Analog Signal, for which it modulates the bus carrier.  

           The modem which is receiving end demodulates the carrier and later that demodulat digital signal hand over to DTE.

            The transmission medium between the two modems can be either a dedicated circuit or a switched telephone circuit. If a switched telephone circuit uses for the modems to connecting to local telephone exchanges.

How does a modem work?

           Basic modulation techniques that are used by a modem to convert analog data to digital data:

ASK (Amplitude shift keying)

FSK (Frequency shift keying)

PSK (Phase shift keying).

DPSK (Differential PSK ).

 These techniques are also called binary continuous wave (CW) modulation.

1. Modems are always used in pairs. Any system, whether it is a simplex, half-duplex or full-duplex, definitely needs a modem on the transmitting and receiving end.

2. A modem acts as an electronic bridge between two worlds – the first world which is purely digital signals and the second one the established analog world.

           Moreover, Modems originally used to connect users with the internet and to send faxes. But now modems are being used in many applications in many businesses.

            There are some special applications like data transfers, remote management, broadband backup, point of sale, machine to machine, and many more.  

           By the way, most solutions are located in the backend, so they are hidden from users, but they work from the backend itself and make our life easier every day.  

Below I have mentioned some such examples.

 Point of Sale (PoS)

            “PoS” full from its Point of Sale. This is a very heavily using application that most consumers use every day.  

           Whenever you pay using a credit card or debit card in a shop or somewhere, then they use only a modem (dial-up or broadband) and behind the data transfer.

 Examples of points of sale:

            Credit Card Payment Terminal restaurants, movie theatres, or retail stores, 

ticketing machines in train stations, bus stations, and airports, pre-pay gas pumps, ATM cash machines

 Remote Management, Maintenance, & Logistics

            Modems can install in remote locations, in off-site locations, tight enclosures, or within sensitive locations. Some applications can be controlled remotely only with the help of modem and there is no need for the user to go to the actual location.

            This saves both time and money, as well as preventing accidents or issues that require quick action and instant configuration changes if needed.

 Examples of Remote Management, Maintenance, or Logistics:

1. Stoplight Timing Control – This can do from the headquarters to regulate traffic flow, which can change the signal timing.

2. Change Roadside Digital Signs – Ability to change messages from headquarters.

3. Grocery Store Freezer and Cooler Call Center – Ability to monitor temperature and status as well, in addition to automatically receiving alerts.

4. Safe company – ability to check the temperature.

5. The irrigation system of the Golf Course – Control the timing and usage of sprinklers and simultaneously monitor their consumption.

6. Vending machine inventory and status – Know what need before reaching the site.

7. Maintenance of Gas / Petrol station – When a credit card will operate pump down, then an alert is automatically relay to a central point for 24 hours a day.

 Data transfers

            Most big companies have a headquarter location where all the data is centrally located. 

This means that all other locations send data to that HQ daily.  

           Dial-up modem solutions are very ideal because they can program so that data can be sent each day with secure connections. This reduces the failure of data transfer significantly, along with it they are also very cheap.

 Examples of data transfers

1. Synchronization of data from other branches in a headquarters location

2. Daily Sales information should be sent automatically from all branches to the headquarters location.

 Machine to Machine (M2M) Communication

            Machine to Machine solutions typically has a communications link that connects two machines (computers and electronic devices) and is capable of transferring data when needed. There is no need for any human intervention in this regard.

 Examples of machine to machine communication

           Medical devices that transfer test results to the doctor’s computer which is located in their office.

           After reading the all above mention information, Let’s know about what is the difference between router and modem.

Difference between modem and router (Router vs Modem)

           You will often get confused between router and modem because it is almost a similar-looking device.  

           Both are about the same size, have flushing lights and both can be connecting to computers.  

           Because a lot of people think that modems and routers are the same things. but they are not. It is different from two separate jobs on a network.

            When a computer will connect to a router, then router gives it a private IP address and then provides it with Internet service via modem via NAT.

           The modem connects you to the Internet through the ISP’s telephone line (Rj11 port), while the Router allows more than one computer to join the same network.

            The job of the modem is to convert digital and analog signals from your ISP to analog and digital. While the router’s job is to deliver the information received from the modem to the computers.

            Modems cannot connect to more than one computer, whereas routers can connect to more than one computer.

           Modem is a work that brings the internet into your home or business. A modem establishes and maintains a direct connection to your Internet Service Provider giving you access to the Internet.

           If you only want your devices can access the internet you can just like that device network cable directly into the modem and then you can access the internet and you don’t need your router.


           I hope you have liked this article about What is a modem and router? Difference between modem and router. It has always been tried to provide complete information so that there is no need to search them in the context of that article on any other site or the Internet. So that you will also save your time and also get all the information in one place.  

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