Ad hoc is a Latin Phrase meaning “for this”.The network is ad hoc because it does not rely on a pre existing infrastructure, such as routers in wired networks or access points in managed (infrastructure) wireless networks.In contrast, ad hoc networks are dynamically formed amongst a group of wireless users and require no existing infrastructure or pre-configuration.
use at :
1)Attendees in a conference room sharing documents and other information via their laptops and handheld computer;
2)Small sensor devices located in animals monitor habitats and environmental conditions;
Unfortunately, the ad hoc nature that makes these networks attractive also introduces many complex communication problems.
A hotspot is a place that provides internet access using Wi-Fi.Hotspots are found in public places as well as private places. Today, many public places in the world such as airports, stores, restaurants, hotels, hospitals, libraries, public payphones, train stations, schools and universities have hotspots.Hotspot usually consist of many access points making a wi-fi network or through 3g.
Access Point, a hardware device or a computer’s software that acts as a communication hub for users of a wireless device to connect to a wired LAN.APs are important for providing heightened wireless security and for extending the physical range of service a wireless user has access to.An access point receives data by wired Ethernet, and converts to a 2.4Gig or 5Gig Hz wireless signal.
An access point is different from a wireless router, in that it does not have firewall functions, and will not protect your local network against threats from the Internet.An access point can be used in conjunction with a router to extend the wireless coverage around your home/business
If you need to use the same SSID and pass phrase then the remote router needs to be set to bridge mode and the same security configurations as the base hub set (all done in a similar manner to configuring a router in repeater mode). This allows for roaming on the same network in a building (although on some older WiFi devices switching to the strongest signal is not automatic but can be achieved by turning the devices WiFi off then on again).
Most wireless routers can be configured as a repeater or extender.It is used to extend the coverage area of your WiFi network.It works by receiving your existing WiFi signal, amplifying it and then transmitting the boosted signal.
It has no cable!!
All you have to do is place the repeater in a location that can receive your existing WiFi network.You can then log into the WiFi repeater via your computer, and input the login details and password of your existing WiFi network, to allow the WiFi repeater to connect and extend
A Wireless Distribution System (WDS) is a system that enables the wireless interconnection of access points in an IEEE 802.11 network.It allows a wireless network to be expanded using multiple access points without the need for a wired backbone to link them.In order to build a successful WDS connection between different devices, it requires that both devices use the same wireless MAC address format.For example,Site A uses 4-address MAC Address format in passive WDS bridge mode,Site B also uses 4-address MAC Address format in active WDS bridge mode.
There are two WDS modes are implemented.
In Repeater mode, the packets received from one peer AP can be repeated to another peer AP through WDS links. Repeater mode performs WDS-to-WDS packet forwarding
In Bridge mode, packets received from a WDS link will only be forwarded to local wired or wireless hosts. Bridge mode does not allow WDS-to-WDS packet forwarding.