![]() In a layman’s term, a firewall can be seen as the security guard for your network or a single chock junction at which security and audits can be enforced. It governs the data traffic going in and out of the system to and from the network. For example, a private LAN to which your system is being connected and the unsafe public network. There is a network interface for forwarding these packets in the righteous direction that is headed towards the destination.Ī firewall is system situated in the middle of the two networks where it imposes the access control policy among those networks. Packet forwarding – The routers uses the routing table to compute in which direction the packets needed to forward.It makes use of routing protocols for doing this where the routing information is distributed from the routing table to the other routers. Additionally, the other work of a router is to maintain the routing table and reflect the modification to the routers connected to the network. Path determination – It is a crucial role of a router in which the router determines the available paths exhibiting to a remote destination.Network port – There are several numbers of network port exist in a router along with different LAN and WAN media ports.Console port – It is used for attaching the terminal and to manage, control and configure these network terminals. ![]() These are also very common in computers and switches. The basic components which a router has are RAM, ROM, CPU and motherboard. At the time of packet forwarding, the router is intended to alter the physical address of the packet.The routers work on the packets where physical destination address matches the address of the interface from where the packet is coming.It has a physical and logical (IP) addresses assigned to its every interface and specifically to the network adapters.The router is used for connecting the independent LANs together, and it is also capable of connecting the WANs (Wide Area Network). One of the characteristics of the router is that it restricts broadcast domains. Further, in a network layer, the router examines the network layer addresses. Similarly, in the data link layer router attempts to verify the physical addresses comprised in the packet. In the physical layer, the router reproduces the received signals. It works on three layers of OSI – physical, data link and network layers. A router is a networking device which is used for checking the physical addresses comprising in the packet.
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