HOW TO CHANGE WIFI ROUTERS PASSWORD OR INSTALL IT

One of the primary drivers behind the establishment of this kind of network is the need to distribute residential Internet access to all internet capable devices in the home. Due to the effect of IPv4 address exhaustion, most Internet service providers provide only one WAN-facing IP address for each residential subscription. Therefore, most homes require a device capable of network address translation (NAT) that can route packets between the public address visible to the WAN and private addresses of individual devices that share that public address. This router defines the boundary at which the service provider's network stops and the home's network begins. While it is possible for home networks to exist without connectivity to the outside world via a router, such topologies would have limited utility considering the bulk of current home network usage comes from home devices communicating with the WAN rather than with other home devices.
A home network usually relies on one or more of the following equipment to establish physical layer, data link layer, and network layer connectivity both internally amongst devices and externally with outside networks: A modem is usually provided by an ISP to expose an Ethernet interface to the WAN via their telecommunications infrastructure. In homes these usually come in the form of a DSL modem or cable modem. A router manages network layer connectivity between a WAN and the HAN. Most home networks feature a particular class of small, passively-cooled, table-top device with an integrated wireless access point and 4 port Ethernet switch. These devices aim to make the installation, configuration, and management of a home network as automated, user friendly, and "plug-and-play" as possible. A network switch is used to allow devices on the home network to talk to one another via Ethernet. While the needs of most home networks are satisfied with the built-in wireless and/or switching capacities of their router, certain situations require the introduction of a distinct switch. For example: When the router's switching capacity is exceeded. Most home routers expose only 4 to 6 Ethernet ports. When power over Ethernet is required by devices such as IP cameras and IP phones When distant rooms have a large amount of wired devices in close proximity A wireless access point is required for connecting wireless devices to a network. Most home networks rely on one wireless router combination device to fill this role. A network bridge connecting two network interfaces to each other, often in order to grant a wired-only device, e.g. Xbox, access to a wireless network medium.