Security in area networks
A technology of regional network and security device, applied in the direction of security device, network topology, network interconnection, etc., can solve the problems of not having built-in security, interfering with access network, etc., and achieve the effect of improving control and monitoring and simple technical solution
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[0048] figure 1 with 2 A part 1 of a typical WLAN is shown. The WLAN includes multiple access point devices 20, and each of the access point devices 20 has a coverage area 21, which can send / receive transmissions to / from one or more client devices on the coverage area 21 25 (e.g. laptop) transmission. There is overlap between adjacent coverage areas 21, and the local area network is configured such that a client device 25 can roam and move to the adjacent coverage area 21 without disconnecting from the local area network.
[0049] The aforementioned access point devices 20 are all connected to a public transmission line 30. The access controller 40 designed to control access to the network is connected to the transmission line 30 at a plurality of positions in the length direction of the transmission line 30. The access controller 40 mainly acts as a gateway to other parts of the local area network (not shown) by sending / receiving transmissions to / from the client device 25 along...
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