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123 hp dj2130

123 HP dj2130
There are three major “modes” a Wi-Fi device can use. These modes define the role a Wi-Fi device has in the network, and networks must be built out of combinations of devices operating in these different modes. How the devices are configured depends on the types of connections you want to use between parts of the network.
In discussing these modes and the examples below, several types of devices are used. In addition to the phones, tablets, and laptops you use in accessing a network, routers make up the hardware that runs the network. These routers are defined in Learn Networking Basics, but for the sake of this document the quick definition of a router is a network device that can connect one network to another, determine what traffic can pass between them, and perform other functions on a network, such as assigning IP addresses.
The three wireless roles are:
[Image: Client_mode_icon.png] Wireless Clients (Station)
[Image: CCK_TypesofNetworks_WiFi_icon_Client.png] Devices such as computers, tablets, and phones are common Clients on a network. When you are accessing a wireless hotspot, or the router in your home or office, your device is the client. This client mode is also known as “station mode” as well.

Some routers can operate as Clients as well, which allows them to act like the wireless card in a computer, and connect to other Access Points. This can bridge two Ethernet networks, or connect to more distant APs.

A Wireless Client is similar to a person in the audience of a play or movie. They are one of several or many people accessing information through the same conduit - someone speaking.
[Image: AP_mode_icon.png] Access Points (Master)
[Image: CCK_TypesofNetworks_WiFi_icon_AP.png] Most wireless networks are made using Access Points - devices that host and control the wireless connection for laptops, tablets, or smart phones. If you use Wi-Fi in your home or office, it is most likely through an Access Point. When a router is set up as an AP, it is said to be in “Master” or “Infrastructure” mode.

An AP is sometimes a stand-alone device that bridges between a wireless and wired (Ethernet) network, or is part of a router. APs can cover a range of areas with a wireless signal, depending on the power of the device and the type of antenna. There are also some APs that are weatherproof, designed to be mounted outdoors.

An Access Point is similar to a person on stage, addressing an audience or crowd - they are providing the information for everyone else. Those audience members can ask questions of the person on the stage, and receive a response.
[Image: Mesh_mode_icon.png] Ad-Hoc Node (Mesh)
[Image: CCK_TypesofNetworks_WiFi_icon_AdHoc.png] Some wireless devices (laptops, smart phones, or wireless routers) support a mode called Ad-Hoc. This allows those devices to connect together directly, without an Access Point in-between controlling the connection. This forms a different type of network - in Ad-Hoc mode, all devices are responsible for sending and receiving messages to the other devices - without anything else in between. In an Ad-Hoc network, every device must be in this role, and using the same configuration to participate. Not all devices use this mode, and some have it as a “hidden” feature.

Ad-Hoc devices are used to create a Mesh network, so when they are in this mode, they are called “Mesh Nodes”.

An Ad-Hoc or Mesh node is similar to an individual in a group or roundtable discussion. They can take equal part in the conversation, raising their hand when they want to speak so the others will listen. If someone at the end of the table cannot hear, one of the individuals in-between can repeat the original message for the listener.
Quick Activity: Describe the differences in the two example networks below. What are the roles and relationships between the different colored nodes in the networks?
Example 1
[Image: CCK_TypesofNetworks_AdHoc_example.png]
Example 2
[Image: CCK_TypesofNetworks_AP_example.png]
Role of the Pink Nodes:


Relationship between nodes:

Role of the Yellow nodes:


Role of the Blue nodes:


Relationship between nodes:

The two networks above are Ad-Hoc and Infrastructure (Access Point) networks. Are there places or times in a social situation where you are in an Access Point or Client situation? Are there places or times when you are in an Ad-Hoc situation?

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