cwna Certified Wireless Network Administrator Official Study Guide phần 1 pptx

... Concepts 11 1 Polarization 11 1 Gain 11 3 Beamwidth 11 3 Free Space Path Loss 11 4 The 6dB Rule 11 5 Antenna Installation 11 5 Placement 11 5 Mounting 11 6 Appropriate Use 11 6 Orientation 11 6 Alignment ... 802 .11 15 2 IEEE 802 .11 b 15 2 IEEE 802 .11 a 15 3 IEEE 802 .11 g 15 3 Major Organizations 15 4 Wireless Ethernet Compatibility Alliance 15 4 CWNA S...

Ngày tải lên: 14/08/2014, 14:20

... wireless LANs. FIGURE 11 .17 Multi-tenant Office Buildings 3rd Floor 2nd Floor 1st Floor XYZ Corp. 802 .11 b Wireless LAN Coverage Area Proposed Wireless LAN for Client ABC Corp. 802 .11 b Wireless ... has filtering and learning capabilities. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. 317 Chapter 11 – Site Survey Fundamentals FIGURE 11 .13 2.4 GHz DSSS...

Ngày tải lên: 14/08/2014, 14:20

... operation of wireless LANs? A. 802 .11 B. 802 .11 a C. 802 .11 b D. 802 .11 g CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. Chapter 7 – 802 .11 Network Architecture 18 0 FIGURE 7.7 ... Scientific, and Medical 17 . Which one of the following does NOT specify equipment that uses the 2.4 GHz ISM band? A. 802 .11 B. 802 .11 a C. 802 .11 b D. 802 .11 g E...

Ngày tải lên: 14/08/2014, 14:21

... For example, 802 .11 , 802 .11 b, 802 .11 g, and 802 .11 a are all specifications of wireless LANs systems whereas 802 .11 f addresses inter-access point protocol and 802 .11 i addresses wireless LAN security. ... a factor of 2 one time yielding the following: 1 mW x 10 = 10 mW 10 mW x 10 = 10 0 mW 10 0 mW x 10 = 1, 000 mW 1, 000 mW x 10 = 10 ,000 mW 10 ,000 mW x 2 = 2...

Ngày tải lên: 14/08/2014, 14:20

... DSSS technology specified in 802 .11 b is significantly faster than that of 802 .11 FHSS. 802 .11 b compliant hardware is often as little as 1/ 3 of the price of 802 .11 FHSS hardware offering a much ... allowing the administrator to control traffic across the wireless link. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. 83 Chapter 4 – Wireless LAN Infrastructure...

Ngày tải lên: 14/08/2014, 14:20

... Ranges from 14 -64 Parabolic Dish Ranges from 4-25 Ranges from 4- 21 CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. 10 1 Chapter 4 – Wireless LAN Infrastructure Devices 10 . C. Wireless ... additional access points. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. Antennas and Accesso...

Ngày tải lên: 14/08/2014, 14:20

... use or in draft form:  802 .11  802 .11 b  802 .11 a  802 .11 g CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. Chapter 5 – Antennas and Accessories 12 6 FIGURE 5.22 A sample of ... rate specified by the 802 .11 a standard is 54 Mbps. IEEE 802 .11 g 802 .11 g provides the same maximum speed of 802 .11 a, coupled with backwards compatibility for 802 .11...

Ngày tải lên: 14/08/2014, 14:20

... 802 .11 and 802 .11 b products on the market today. Barker Code and Complimentary Code Keying (CCK) are the types of spreading codes used in 802 .11 and 802 .11 b wireless LANs. CWNA Study Guide ... 219 Chapter 8 – MAC and Physical Layers 11 . 802 .11 b devices use what type of modulation at 11 Mbps? A. BPSK B. DPSK 12 . 802 .11 a devices use what type of modulation ... phy...

Ngày tải lên: 14/08/2014, 14:20

... specified as a center frequency +11 MHz and -11 MHz. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. 265 Chapter 10 – Wireless LAN Security FIGURE 10 .3 Centralized Encryption Key Server ... 9 .19 illustrates channel reuse. FIGURE 9 .19 Channel reuse Channel 1 Channel 1 Channel 1 Channel 11 Channel 11 Channel 6 Range Considerations When consider...

Ngày tải lên: 14/08/2014, 14:20

... still be able to gain access to the network. CWNA Study Guide © Copyright 2002 Planet3 Wireless, Inc. Chapter 11 – Site Survey Fundamentals 314 FIGURE 11 .8 Wireless Sniffer screenshot ... protocols are network security tools above and beyond what is specified by the 802 .11 ? Choose all that apply. A. 802.1x and EAP B. 8 011 .g C. VPNs D. 802 .11 x and PAP 16...

Ngày tải lên: 14/08/2014, 14:20