What is a Router?
A router is a type of device that specifically connects with computers. Its function is smoothly forwarding packets of data along with networks. To put it simply, routers are designed to capture information that is received via a broadband connection through a modem and then it is delivered to your PC. Routers choose routes for data packets, which help you receive information. They are also multi-port devices and considered better than bridges and repeaters.
Aside from forwarding data packets, routers also support encapsulation and filtering just like bridges. They also operate at data link, physical and network layer of the OSI model. Another common thing between bridges and routers is that they are both self-learning. Routers smoothly communicate their existence to other devices at the same time can learn the existence of new routers, LAN segments, and nodes.
Routers have access to a logical address (IP address) or network layer address. They have routing tables that help them make decisions related to the route and which best path to choose for a particular transmission between the 2 hosts. Take note that it is important to understand that routing tables are not stable. They are dynamic and updated quickly using routing-protocols.
Routers and routing products can easily transform your IT network and deliver both high-security. They can also provide reliable service to data centers, campuses, and branch networks. Routers can be found at gateways, where 2 or more networks are connected such as either 2 WANs or LANs or sometimes LAN to ISP network.
How Does Router Work?
A router receives data packets from one connected network and then quickly passes to the second network that is connected to it. However, if a received packet consists of the node address which is present on a different network that the router is not part of, then the router basically chooses the best relay point (one of the networks connected) for data packets. Once the route/network is selected, the router immediately passes the data packets to the other router. Then the receiving router checks and verifies the destination address and seeks for the best route for the data packet to transmit, Then the last step is it passes the data packets to the destination network.
Different Types of Routers
Before you buy a router, let’s take a look at some of the most commonly used routers. These are the different types of routers available in the market:
Broadband routers are usually used to interlink or connect computers to the internet. Therefore, if you connect to the internet using your phone or VOIP, then you will need a broadband router. Broadband routers are special types of modems that need both phone jacks and Ethernet cable.
As the name suggests, a wireless router enables to create a wireless signal in the office or at home. Any PC that is within the range of the wireless router can connect and access the internet without the need for any cables or wires. As for safety precaution, it is advisable to add a wifi password to avoid random people from accessing your internet connection for free.
Subscriber Edge Router
The subscriber edge router, also called Customer router, belongs to the end-user, enterprise organization. It is configured to broadcast external BGP to its provider’s AS.
The edge router is placed at the edge of network ISP and provides connectivity with other networks, not internal as it is the job of the core router.
Instead of the periphery, core router resided in the middle of the LAN network which is why it is called the core or the backbone router. It interconnects routers from different establishments of the campus through LAN or large enterprise location. The core router is optimized for high bandwidth.
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