!) Hotel Te.chnoloqy next SHSIIOA 0 ) ) )) ) (associated to lllAN10) switch ISingle purpose wireless network I ) ) )) SHSIDA u ) (associated to lllAN10) ) ) ) SSID VOIP ) CAT 5 cable Blue =· VlAN10 Red=· VlAN20 ) ) ) (assoda:ed wvtAN20) ) tov 1 Green VlAN30 =
Interrogator (reader) pricing is shown in U.S. dollars and varies depending on the features and functionality required. Tag Type Frequency (Band) Range Cost Low (125 - 134 KHz) 0 – 18 inches (12 inch average) $100.00 - $750.00 High (13.553 – 13.567 MHz) 125 – 134 KHz (3 feet) $200.00 - $500.00 UHF (Ultra high frequency) 400 – 1,000 MHz (10 – 20 feet) $1,000 - $5,000 Figure 22: RFID Frequency Range Ultra high frequency tags typically operate at 915 MHz in the United States and 868 MHz in Europe. When longer ranges are needed, such as for tracking containers, active tags use batteries to boost read ranges to 300 feet (100 meters) or more.
B. Security Filters Guests cannot view other user activity on a shared wireless network due to “Intracell blocking,” which forbids direct communication or Publicly Secure Packet Forwarding (PSPF) which denies all inter-client traffic. Regardless of what the service is called, a dynamic filter prevents any two MAC addresses that enter the same radio interface from going to a destination on the same interface. For example, when USER1 enters interface Radio1, access is allowed on any destination on FA0 / 0 (the uplink port to the Internet), but no access is given to view USER2 who is connected to Radio1 at the same time. This filter provides a level of security to any user connected to this radio. However, a user at this point could still connect to another user who happens to be on another radio (WAP). Types of security for applications on the same infrastructure are given below. 1. User-to-User Security (Port-to-Port) The switches that provide uplinks to each WAP must also support user-to-user security to eliminate the risk of users going to the same destination. This is accomplished with port-to-port security or VLANs. Port protection provides this security as long as the WAPs are all connected to a single switch, however, if multiple switches are used, port protection often does not provide security between WAPs connected to different switches. Using a separate VLAN for each WAP is the most secure method of user-to-user security. 2. User-to-User Security (VLAN) VLANs and multiple SSIDs can provide absolute user-to-user security. Each is in a separate “broadcast domain” which means that if a user in VLAN1 sends a layer three broadcast (such as an ARP broadcast), no user in VLAN2 will see the broadcast because each is in separate “broadcast domains.” Switches and higher- end WAPs are both capable of supporting VLANs. To interconnect a switch that has multiple VLANs and a WAP that has VLANs, a “trunk” is configured to pass this information.
NAK The value returned when a request has been sent to the device and the device is not prepared to respond. Null No value, or zero, depending upon context. OBEX Object Exchange Protocol is a transfer protocol that defines data objects and a communication protocol two devices can use to exchange those objects. OBEX enables applications to work over the Bluetooth protocol stack as well as the IrDA stack. OFDMA Orthogonal Frequency Division Multiple Access provides optimized use of bandwidth for the high-speed flow of data for multiple subscribers. It overcomes interference and enables bi- directional broadcast and broadband convergence. Packet Format of aggregated bits that are transmitted on a physical channel. PAN Personal Area Networking profile describes how two or more Bluetooth enabled devices can form an ad-hoc network and how the same mechanism can be used to access a remote network through a network access point. The profile roles include the network access point, group ad-hoc network and personal area network user. Passcode Passcode is used to authenticate incoming connections when pairing devices. It provides assurance that a connection is directed to the expected device or person. A passcode can normally be any combination of keys (letters or numbers). Caution must be used as some devices do not map characters similarly. . Passive RFID tag Passive RFID tags get their power by the reader-interrogator (not a battery) which allows them to activate and respond from the electronic field (radio waves) transmitted. PCS / PDC Personal Communications Service is a digital mobile system network that typically operates at a frequency of 1900 MHz.