NETWORK COMPONENTS BY REYNALDO ZAMORA

HUB Hubs are devices that serve as the central connection for a network. Its job is to send data from one computer to all other computers in the same network making sure it reaches its intended destination. Usually operates in layer 1 of the OSI model, and places a lot of traffic on the network. This devices are generally used for home networking or small business offices. Hub’s range from $20-$130 Receives data Hub distributes data to all computers on the network

SWITCH A switch is similar to a hub in the way it operates, switches are devices that filter and send data in a network. Unlike a HUB a switch operate usually in layer 2 in the OSI model and can identify were exactly to send the data. A switch usually contain software the helps improve traffic in the network an improvement over HUBs. A switch can be used in home networks or large business networks when you need to add more devices to your network. A switch can range from $20-$3,000 Receives data Sends data to appropriate destination

ROUTER A router’s job is to route data (packets) to other networks until it reaches its destination. They are typically connected to two networks like LAN’s or WANs. A router uses IP addresses and operates in the Layer 3 OSI model to determine what is the best path for forwarding the data. Router's should be used when data needs to be relayed between networks. Routers range from $20- and up to $30,000+ Router receives data (packets) Router routes the data (packets) to destination by using IP address

BRIDGE A Bridge is a device that filters data traffic in a network, the bridge inspects the incoming data traffic and decides what to do with it. A bridge performs almost he same function as a switch, but a bridge is usually operates on LAN and uses MAC addresses. A bridge could be used when trying to connect LAN networks. A bridge can range from $20-$500 The Bridge filters the traffic coming in and routes it to a LAN network to connect them.

GATEWAY Gateway is any device that serves as an entrance to another network. An ISP would be an example of a gateway, the ISP acts as a gateway between the user and the internet. When the user wants to accesses the internet (another network) the ISP (gateway) is the device that allows that to happen. Gateway's can range from $ ,000+ Internet ISP Gateway User The ISP(gateway) provides a way for the user to connect to the internet(another network)

FIREWALL A firewall is system that can be hardware or software that is designed to protect networks from other networks. A firewall prevents unauthorized access to and from a private network. A firewall examines all data coming in and out and blocks any that do not meet the criteria for that network. Firewall should be used when trying to protect accesses to sensitive information. Network 1 Network 2 The firewall examines all incoming traffic then blocks any that don’t meet the criteria.

FIREWALL CONT’D. Firewall’s can either come in a software form or in hardware. Software can range from $25-$8,000+ and Hardware can range from $150-$40,000+ Hardware Software

WIRELESS AP A wireless AP is a device that connect wireless devices to a wired network. Wireless AP are usually wired to a LAN then allow wireless devices to connect to it with wireless standards like Wi-Fi or Bluetooth. Wireless AP can be used in environments (office, coffee shops, airports) where wireless devices (laptops, tablets, smartphones, etc..,) can remain connected with a network(internet). Wireless AP devices range from $20-$1,000 Internet Router Wireless AP Wireless devices

NETWORK DIAGRAM Internet ISP Gateway firewall Router SwitchWireless AP Wireless devices Network pc’s Bridge PC’s on LAN Hub