Router

Introduction A router is a device in computer networking that

forwards data packets to their destinations,

based on their addresses.

The work a router does it called routing, which is

somewhat like switching, but a router is different

from a switch.

The latter is simply a device to connect

machines to form a LAN.

Router

Routers take information that arrives through your

broadband signal via a modem, decipher it, and

deliver it to your computer.

The router will also choose the best route for the

data packet so that you receive the information

quickly.

Router

How a Router Works

When data packets are transmitted over a

network (say the Internet), they move through

many routers (because they pass through many

networks) in their journey from the source

machine to the destination machine.

Routers work with IP packets, meaning that it

works at the level of the IP protocol.

Router working animation

Router Working

Each router keeps information about its neighbours'

(other routers in the same or other networks).

This information includes the IP address and the

cost, which is in terms of time, delay and other

network considerations.

This information is kept in a routing table,

found in all routers.

Router Working

When a packet of data arrives at a router, its header

information is scrutinized by the router.

Based on the destination and source IP addresses of

the packet, the router decides which neighbour it

will forward it to.

It chooses the route with the least cost, and

forwards the packet to the first router on that route.

Types of Routers

Broadband Routers

Broadband routers can be used to do several different

types of things.

They can be used to connect two different computers

or to connect two computers to the Internet.

They can also be used to create a phone connection.

Broadband Router

Broadband Router

If you are using Voice over IP (VoIP) technology, then

you will need a broadband router to connect your

Internet to your phone.

These are often a special type of modem that will have

both Ethernet and phone jacks.

Although this may seem a little confusing, simply follow

the instructions that your VoIP provider sends with your

broadband router - usually you must purchase the router

from the company in order to obtain the service.

Types of Router

Wireless Router

Wireless routers connect to your modem and create

a wireless signal in your home or office.

So, any computer within range can connect to your

wireless router and use your broadband Internet for

free.

The only way to keep anyone from connecting to your

system is to secure your router.

Wireless Router

Wireless Router

A word of warning about wireless routers: Be sure

your secure them, or you will be susceptible to

hackers and identity thieves.

In order to secure your router, you simply need to

come to WhatIsMyIPAddress.com, and get your

IP address.

Then, you'll type that into your web browser and

log into your router (the user ID and password will

come with your router).

The End

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