Router
A router is a computer networking device, commonly specialized hardware that forwards data packets between computer networks. It is layer three (Network Layer) device. It forwards the packet on the basis of Routed Protocols such as IP, IPv6, and IPX etc.
This device is generally used to communicate between two or more than two different segment, different network or LAN. It means If you have two identical LAN, established in two different location such as New York and Arizona. And you want to make connection between them; Router can solve your problem.
This creates an overlay internetwork, as a router is connected to two or more data lines from different networks. When a data packet comes in one of the lines, the router reads the address information in the packet to determine its ultimate destination. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey.
A data packet is typically forwarded from one router to another through the networks that constitute the internetwork until it reaches its destination node.
Functions
Router has generally three main functions.
PACKET FORWARDING:
Router maintains a routing table for all possible networks those can be reached. In the routing table, a router maintains, subnet, Gateway, forwarding interface, timing etc of the destination network. If multiple paths exist to reach the destination network, only best path is maintained in the routing table. Once any packet is received, it checks the destination IP network in the routing table. If destination network is available in routing table, It forwards the packet otherwise it drops.
PACKET SWITCHING:
To move packets from one interface to another to get a packet to its destination.
PACKET FILTERING:
Packet filtering is such like firewall. By which you can define which network can be entered and which network can be dropped. In easy word, It filters the packet on the basis of IP address, subnet, port no and protocols.
Types of Routers
There are several types of routers that you will want to understand. You need to know the difference so that you can set up your network or at least so that you can understand what the local computer guy tells you to do.
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. 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.
Wireless Routers
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.
A router is a computer networking device, commonly specialized hardware that forwards data packets between computer networks. It is layer three (Network Layer) device. It forwards the packet on the basis of Routed Protocols such as IP, IPv6, and IPX etc.
This device is generally used to communicate between two or more than two different segment, different network or LAN. It means If you have two identical LAN, established in two different location such as New York and Arizona. And you want to make connection between them; Router can solve your problem.
This creates an overlay internetwork, as a router is connected to two or more data lines from different networks. When a data packet comes in one of the lines, the router reads the address information in the packet to determine its ultimate destination. Then, using information in its routing table or routing policy, it directs the packet to the next network on its journey.
A data packet is typically forwarded from one router to another through the networks that constitute the internetwork until it reaches its destination node.
Functions
Router has generally three main functions.
PACKET FORWARDING:
Router maintains a routing table for all possible networks those can be reached. In the routing table, a router maintains, subnet, Gateway, forwarding interface, timing etc of the destination network. If multiple paths exist to reach the destination network, only best path is maintained in the routing table. Once any packet is received, it checks the destination IP network in the routing table. If destination network is available in routing table, It forwards the packet otherwise it drops.
PACKET SWITCHING:
To move packets from one interface to another to get a packet to its destination.
PACKET FILTERING:
Packet filtering is such like firewall. By which you can define which network can be entered and which network can be dropped. In easy word, It filters the packet on the basis of IP address, subnet, port no and protocols.
Types of Routers
There are several types of routers that you will want to understand. You need to know the difference so that you can set up your network or at least so that you can understand what the local computer guy tells you to do.
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. 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.
Wireless Routers
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.
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