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2025-01-28 22:06本頁面
【正文】 courtesy of Cisco Systems, Inc.) A PC Card wireless work adapter (Photo courtesy of Cisco Systems, Inc.) 121 Access Points ? Access points (APs) connect wireless workstations to wired works or to other wireless workstations A wireless access point (Photo courtesy of Cisco Systems, Inc.) 122 Wireless Switches ? WLAN switches reduce the amount of broadcast traffic passed from wireless work segments to a wired work 123 Wireless Print Servers ? Print servers allow a printer to be connected independently to a wireless work A standalone wireless print server (Photo courtesy of Cisco Systems, Inc.) A printer insertion module that enables a wireless work connection (Photo courtesy of HewlettPackard) 124 Wireless Routers ? Wireless routers provide the functions of an access point, a wireless switch, and a router A wireless router can support several wireless workstations, as well as wired workstations. (Photo courtesy of Cisco Systems, Inc.) 125 Wireless Bridges ? Wireless bridges connect two or more LANs (wired or wireless) A wireless bridge is used to connect LANs in two separate buildings. (Photo courtesy of Cisco Systems, Inc.) 126 Wireless Repeaters ? Wireless repeaters can be used to extend the range of a WLAN by rebroadcasting the signals it receives after conditioning them for increased strength and clarity A wireless repeater is used to increase the transmission range of a WLAN. (Photo courtesy of Buffalo Technology (USA), Inc.) 127 Antennas ? Antennas are used in wireless works to receive and transmit signals through the air An auxiliary antenna can help overe signal strength issues in a WLAN. (Photo courtesy of DLink Systems, Inc.) 128 Voice Over IP (VoIP) ? Voice Over IP allows telephone signals to be carried over data works ? Wireless VoIP supports mobile, or roaming, users ? Telephones must include an RF transmitter, receiver, and antenna A woman using a Blackberry as a wireless telephone. (Photo courtesy of Research in Motion, Ltd.) 129 Radio Frequency Identification ? Radio Frequency Identification (RFID) is an RFbased system that can retrieve and store information in devices called RFID tags RFID transparent labels
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