R1x g11 wifi ii
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This document discusses Wi-Fi technology, including its operation, components, and limitations. It describes how Wi-Fi networks use radio frequencies to transmit data via protocols like OFDM and MIMO. Components that enable Wi-Fi include access points, routers, modems, and wireless adapters. While Wi-Fi can transmit data over large distances in some cases, it is typically limited by interference from other signals, physical obstructions, and distance from the connecting router.
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1) The mobile phone market has grown rapidly with over 1.3 billion users globally and mobile networks expanding to reach more of the world's population. 2) Various wireless technologies are being developed and tested to deliver broadband internet access to both fixed and mobile users. These include 3G, WiFi, WiMax and other proprietary standards. 3) Different wireless technologies have advantages for different use cases depending on required data rates, range, mobility and other factors. Integration of these technologies into a common IP-based network is seen as key to delivering flexible multi-service connectivity.
Introduction To Cellular And Wireless Networks
This document provides an overview of cellular and wireless networks. It discusses the history and evolution of 1G to 4G cellular networks, including the development of technologies like GSM, CDMA, UMTS, HSPA and LTE. It also covers the basics of wireless local area networks (WiFi) and describes the IEEE 802.11 standards including 802.11b, 802.11g and 802.11n. Finally, it discusses future trends in both cellular and wireless networks.
WIRELESS COMMUNICATIONS
Wireless communications is a type of data communication that is performed and delivered wirelessly. This is a broad term that incorporates all procedures and forms of connecting and communicating between two or more devices using a wireless signal through wireless communication technologies and devices.
Kablosuz İletişim ve Güvenlik
This document provides an overview of wireless networks and security. It discusses the evolution of IEEE 802.11 WiFi standards over time, including vulnerabilities in early versions like WEP. It also covers wireless topics like ISM bands, channel layout, modes, and common attacks against open or weakly encrypted networks. The document demonstrates wireless scanning and attacks. It introduces RF concepts like electromagnetic interference and TEMPEST attacks. Finally, it presents wireless security tools like Ubertooth, RTL-SDR, and HackRF.
4 g technology
4G networks are projected to provide speeds up to 100Mbps for mobile use and 1Gbps when stationary. 4G standards include LTE and WiMAX and allow the use of multiple technologies like GPS, WLANs, and CDMA simultaneously for integrated wireless solutions. Key features of 4G include higher speeds, lower latency, improved connectivity, and support for multimedia applications.
cellular communication
This document provides an overview of mobile communication and cellular technologies. It begins with learning objectives which are to refresh basics of cellular technologies, understand functioning in a cellular environment, and explain technical aspects of cellular telecommunications. The document then outlines the course agenda which will cover topics like access methods, multiple access techniques, mobile services, evolution of cellular communication standards like GSM and CDMA, cellular networks, and wireless data technologies. It dives into concepts like electromagnetic waves, frequency division multiple access, time division multiple access, duplexing, cellular architecture with frequency reuse, and elements of mobile communication systems.
Other Wireless Networks
This document discusses various wireless networks including WiMAX, cellular networks, and satellite networks. It describes WiMAX services and standards, the evolution of cellular networks from 1G to 4G, and key aspects of satellite network operations including orbit types, footprints, and frequency bands. Specifically, it outlines the characteristics of GEO, MEO, and LEO satellite orbits and provides examples for each type. The document provides a technical overview of the technologies, standards, and applications of several major wireless networking approaches.
Wi max
WiMax (Worldwide Interoperability for Microwave Access) is a wireless technology that provides broadband connections over long distances using radio signals rather than cables or wires. It uses the IEEE 802.16 standard to deliver high-speed internet access of up to 40 Mbps to fixed locations and 15 Mbps for mobile use within a few kilometers of the base station. WiMax can provide both fixed and mobile broadband access as an alternative to cable and DSL. It has a longer range than WiFi with connections of up to 30 miles using line-of-sight antennas.
Presentation of-wimax
WiMAX is a wireless technology that provides broadband internet access over long distances. It uses radio waves to transmit data and can provide connectivity up to 30 miles from a base station. WiMAX uses the IEEE 802.16 standard and consists of components like the base station, receiver, and antennas. It establishes connections like cellular networks but provides faster speeds than WiFi for connecting larger areas.
4g
1) Wireless communication has evolved from 1G to 4G networks, with each generation offering faster speeds and new capabilities. 2) 4G networks provide broadband speeds up to 1Gbps using technologies like OFDMA, MIMO, and an all-IP packet switched network. 3) Key aspects of 4G include mobile broadband access, customized services, and support for multimedia and voice over internet protocol.
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1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
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7:个人信誉贷款加10分
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Null Bangalore | Pentesters Approach to AWS IAM
#Abstract:
- Learn more about the real-world methods for auditing AWS IAM (Identity and Access Management) as a pentester. So let us proceed with a brief discussion of IAM as well as some typical misconfigurations and their potential exploits in order to reinforce the understanding of IAM security best practices.
- Gain actionable insights into AWS IAM policies and roles, using hands on approach.
#Prerequisites:
- Basic understanding of AWS services and architecture
- Familiarity with cloud security concepts
- Experience using the AWS Management Console or AWS CLI.
- For hands on lab create account on [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
# Scenario Covered:
- Basics of IAM in AWS
- Implementing IAM Policies with Least Privilege to Manage S3 Bucket
- Objective: Create an S3 bucket with least privilege IAM policy and validate access.
- Steps:
- Create S3 bucket.
- Attach least privilege policy to IAM user.
- Validate access.
- Exploiting IAM PassRole Misconfiguration
-Allows a user to pass a specific IAM role to an AWS service (ec2), typically used for service access delegation. Then exploit PassRole Misconfiguration granting unauthorized access to sensitive resources.
- Objective: Demonstrate how a PassRole misconfiguration can grant unauthorized access.
- Steps:
- Allow user to pass IAM role to EC2.
- Exploit misconfiguration for unauthorized access.
- Access sensitive resources.
- Exploiting IAM AssumeRole Misconfiguration with Overly Permissive Role
- An overly permissive IAM role configuration can lead to privilege escalation by creating a role with administrative privileges and allow a user to assume this role.
- Objective: Show how overly permissive IAM roles can lead to privilege escalation.
- Steps:
- Create role with administrative privileges.
- Allow user to assume the role.
- Perform administrative actions.
- Differentiation between PassRole vs AssumeRole
Try at [killercoda.com](https://killercoda.com/cloudsecurity-scenario/)
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Electric vehicle and photovoltaic advanced roles in enhancing the financial p...
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R1x g11 wifi ii
- 1. FRFABRIKAM RESIDENCES Presented By: Amira Mohamed Esawy. Omnia Mahmoud Abd-Alkader. Sarah Mohamed Abd -Alkader.
- 3. Wi-Fi vs 3G,4G: -Type of network. -Range/ coverage area. -Control. -Speed. -Cost. 3
- 4. 4G?! -OFDM (orthogonal frequency division multiplexing): Parallel data streams/ sub signals. -MIMO (multiple input Multiple output): Multiple antennas in both phone and base station. 4
- 5. Wi-Fi & Hotspot: •No hotspot without wifi. 5
- 6. MiFi -Form. -Functionality (modem and router). -Cellular support. 6
- 7. Wi-Fi (Signals): - RF signals (3KHz: 300GHz). 7
- 9. Wi-Fi (Signals): - 2.5GHz or 5GHz. 9
- 10. Wi-Fi (Signals): 10 LOWER FREQUENCY MHZ UPPER FREQUENCY MHZ COMMENTS 2400 2500 -2.4 GHz band -most widely used. -14 channels. -maximum three non-overlapping channels. 5725 5875 -5 GHz band or 5.8 GHz band provides additional bandwidth. -24 channels. - 23 non-overlapping channels.
- 11. Wi-Fi (Signals): 11 CHANNEL NUMBER LOWER FREQUENCY MHZ UPPER FREQUENCY MHZ 1 2401 2423 2 2406 2428 3 2411 2433 4 2416 2438 5 2421 2443 6 2426 2448 7 2431 2453 8 2436 2458 9 2441 2463 10 2446 2468 11 2451 2473 12 2456 2478 13 2461 2483 14 2473 2495
- 13. Wi-Fi (Signals): -Overlapping and more interference. 13
- 14. Wi-Fi (Signals): 5GHz. Less interference and noise. 14 36 5180 40 5200 44 5220 48 5240 52 5260 56 5280 60 5300 64 5320 100 5500 104 5520 108 5540 112 5560 116 5580 120 5600 124 5620 128 5640 132 5660 136 5680 140 5700 149 5745 153 5765 157 5785 161 5805 165 5825
- 15. Wi-Fi : Hardware •Access Point. •Router. •Modem. Add a footer 15
- 16. Access Point: • Bridge between wireless network and wired network. • An antenna to allow wireless clients to connect. 16
- 17. Router: •Wired vs Wireless. •SISO VS MIMO: -number of antennas and channels being used. -Speed. -Reliability. 17
- 18. SISO vs MIMO: 18
- 19. Modem: • To provide internet access. • NOT WIFI! 19
- 20. Wireless adapter: • Convert data from binary form into radio frequency signals and transmit them. • Receive RF signals and convert them into binary data and pass them to a computer 20
- 21. Wi-Fi (without Internet) : -why?! -WetinBe Wi-Fi In-Bus Entertainment (IBE). 21
- 22. Wi-Fi (with Internet) : process 22
- 26. Limitations: •Physical Obstruction. 26 -Swedish Space Agency transferred data 260 miles to an overhead stratospheric balloon using WiFi. -Non-standard WiFi equipment. -6 watt amplifiers. -No physical barriers.
- 27. Limitations: Distance from the router. Add a footer 27