![]() ![]() Unlike routers and switches, firewalls are network security appliances. DNS converts all domain names into IP addresses so that your router knows where to direct outgoing traffic.IP addresses are only assigned for limited periods after which they are renewed or reassigned. This unique address allows your device to connect with the Internet. DHCP (dynamic host configuration protocol) assigns a unique IP address to devices on your internal network.When reply data packets arrive, the NAT translates the public-facing IP address into the device’s specific internal IP. This singular IP address is then used to connect to the greater Internet. A NAT or network address translator which takes the individual IP addresses for all devices on your internal network and translates them into a single public-facing IP address.A typical router provides at least the following services: Routers are far more intelligent than switches and hubs. For example a router could connect your home’s LAN to your ISP’s (internet service provider) network. These devices are positioned at gateways where two networks connect. While switches and hubs transmit data within a single network, routers are used to route data between different networks. This is a necessary efficiency for larger networks where bandwidth is at a premium and it enhances the local network security. This ensures that information is only delivered to relevant computers rather than every device on the network. When a switch receives data on one port, it uses its address records to identify where traffic came from and to which device it should be forwarded. ![]() ![]() In this process, the switch learns which device is connected to which port. As data is sent back and forth through the switch, it records MAC addresses (unique identification number for network-enabled hardware) for each sender and recipient. Switches are intelligent, high-performance hubs. Here is a closer look at the distinguishing features and capabilities of each network device. While these components are often confused due to their similar appearance (metal boxes with physical ports and LED status lights) each one serves a specific function. Switches, routers and firewalls are all essential pieces of equipment needed to run and protect your network. ![]()
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