Building Secure Wireless Networks with 802.11 phần 9 ppt

... 20 Mbps (to be compatible with 802.11b, 802.11g needs to operate in DSSS in only up to 11 Mbps). The 802.11g devices would directly compete with the 802.11a devices, as 802.11g provides the backward ... communicate over dialup connect in TCP/IP−based networks such as the Internet or corporate Intranets. PAP is a 81 Table of Contents Building Secure Wireless Networks with 802...

Ngày tải lên: 25/03/2014, 11:08

... hundreds of papers on the subject. The re- 71 Handbook of Wireless Networks and Mobile Computing, Edited by Ivan Stojmenovic Copyright â 20 02 John Wiley & Sons, Inc. ISBNs: 0-471-419 02- 8 (Paper); ... Communications, 18, 7, 125 4– 126 0, 20 00. 6. U. Black, Mobile and Wireless Networks, Upper Saddle River, NJ: Prentice Hall, 1996. 7. U. Black, Second Generatio...

Ngày tải lên: 13/08/2014, 12:21

... lower band (5. 15- 5. 25 GHz) 40 mW (2 .5 mW/MHz) 36 40 44 48 5. 180 5. 200 5. 220 5. 240 U-NII mid-band (5. 25- 5. 35 GHz) 200 mW (12 .5 mW/MHz) 52 56 60 64 5. 260 5. 280 5. 300 5. 320 ... band (5. 7 25- 5.8 25 GHz) 800 mW (50 mW/MHz) 149 153 157 161 5. 7 45 5. 7 65 5. 7 85 5. 8 05 [a] The allowed power is the maximum output power usin...

Ngày tải lên: 14/08/2014, 13:20

... classify them any further. Brave, stout-hearted readers can order the specification from the PCMCIA and use the dump_cis tool on Linux to read the CIS of inserted cards. The CIS assists the host ... script on the wireless station to send traffic periodically to prevent the association from timing out. 13.3 .6. 6 "MAC initialization failure, result=xxx" The fi...

Ngày tải lên: 14/08/2014, 13:20

... Advanced 802 .11 Wireless LANs 16 0 High Security and Authentication−Enabled 802 .11 Wireless LANs 16 0 The 802.1X Standard 16 0 Virtual Private Network for Wireless LANs 16 1 Building a Secure Wireless ... 50 The 802 .11 Extensions 50 802 .11 b 50 802 .11 a 52 802 .11 g 53 802 .11 Shortcomings 54 Wireless Standards Comparison 55 Summary 55 Chapter 4: Is Wireless...

Ngày tải lên: 14/08/2014, 14:20

... bytes= 32 time<10ms TTL= 128 Reply from 1 92. 168.0 .2: bytes= 32 time<10ms TTL= 128 Reply from 1 92. 168.0 .2: bytes= 32 time<10ms TTL= 128 Reply from 1 92. 168.0 .2: bytes= 32 time<10ms TTL= 128 6. ... "ping 1 92. 168.0 .2& quot; from the computer with IP address 1 92. 198.0.3. The program should reply with: C:\>ping 1 92. 168.0 .2 Pinging 1 92. 168.0 .2 w...

Ngày tải lên: 14/08/2014, 14:20

... incurs. In addition, 802.11a networks are incompatible with the 802.11b networks due to the difference in the radio frequency band used by 802.11a (802.11b uses 2.4 GHz whereas 802.11a uses 5 GHz), ... 802.11a like fast Ethernet is compared with Ethernet. Because 802.11a operates in 5 GHz, it can coexist with 802.11b networks without causing any interference. 802.11a is being used...

Ngày tải lên: 14/08/2014, 14:20

... available wireless LAN technologies. The main security issue with wireless networks, especially radio−frequency−based networks (for example, 802.11 based networks) , is that the wireless networks ... used to secure wireless LANs. We talk about security requirements of wireless LANs, the IEEE 802.11 security architecture, the shortcomings of 802.11 security protocols,...

Ngày tải lên: 14/08/2014, 14:20

... of the 802.11b standard with the 802.11a. Table 8.2: 802.11b Compared with 802.11a TECHNOLOGY STANDARD MAXIMUM SPEED FREQUENCY BAND GEOGRRAPHIC RANGE 802.11b 11 Mbps 2.4 GHz 300 meters 802.11a ... Intel branded wireless LAN products based on the IEEE 802.11 standards. 802.11b Products Table 8.11 shows the major Xircom products based on 802.11b. Table 8.11: Xircom Products Based on 802...

Ngày tải lên: 14/08/2014, 14:20

... a bit more secure. To use 802.1X in an 802.11 wireless LAN, you must use the following components: 802.11a− or 802.11b−compliant wireless LAN adapter(s).ã Software drivers for the wireless LAN ... computers installed with a wireless LAN adapter can communicate with each other, forming an ad−hoc LAN, if they are configured for ad−hoc mode operation. When comparing 802.11 ad−h...

Ngày tải lên: 14/08/2014, 14:20

... Systems, make wireless LAN APs that can provide both 80 2.11b and 80 2.11a wireless AP services. If you already have a wireless LAN that uses 80 2.11b and you want to upgrade to 80 2.11a wireless LANs, ... antenna. ã 183 Now that we are familiar with the two advanced security technologies, the 80 2.1X and the VPN technologies, let's use them to build a secure wirele...

Ngày tải lên: 14/08/2014, 14:20

... came to be known generally as the Wireless Initiative. Phase One of Wireless Andrew was released in 199 7. The Initial Wireless Andrew Wireless Andrew consists of wireless LAN access points that ... path to new wireless technologies as they develop. In 199 8, Hyland hired a New Jersey company called InvisiNet to install the workstations. The first system was only a 2 MB system. In...

Ngày tải lên: 14/08/2014, 14:20

... Based on 802.11a Chapter 10: Advanced 802.11 Wireless LANs Table 10. 1: A Sample Network Address Table with One Entry Chapter 11: Troubleshooting Wireless LANs Table 11.1: The Effect of Building ... 802.11b Table 8.8: Linksys Wireless Products Based on 802.11b Table 8.9: NetGear Products Based on 802.11b Table 8 .10: NETGEAR Products Based on 802.11a Table 8.11: Xircom Products...

Ngày tải lên: 14/08/2014, 14:20

... and guides you through building secure wireless LANs using the 802.11 standard. We have divided the process of building a wireless LAN into three separate steps: planning a wireless LAN, purchasing ... LAN Adapters Wireless LAN adapters or wireless network interface cards (wireless NICs) are devices that individuals use with their wireless computing devices to participa...

Ngày tải lên: 14/08/2014, 14:21