What is an advantage of using HTTP-based processing?
HTTP's Popularity:HTTP is the foundation of the web, making it widely known and supported. Developers have extensive familiarity with its concepts (methods, headers, status codes, etc.).
REST APIs and Webhooks:These often leverage HTTP for communication, building upon existing knowledge and tools.
Tradeoffs:
Security:HTTP itself is not inherently secure; HTTPS or additional layers address this.
Speed:Protocols optimized for IoT may have lower overhead, but HTTP's simplicity often outweighs minor performance differences.
References:
REST APIs:Overviews of their use of HTTP, demonstrating its prevalence in API development.
Developer Experience with HTTP:Discussions on the familiarity with and availability of HTTP libraries in various programming languages
What function does the IEEE perform in relation to wireless technologies?
IEEE's Role:The Institute of Electrical and Electronics Engineers (IEEE) is a global organization critical in developing and promoting technical standards across various fields, including wireless technologies.
Standards Work:IEEE creates wireless technology standards like:
IEEE 802.11:Wi-Fi standards
IEEE 802.15.4:Basis for ZigBee, Thread, and other low-power networks
References
What consideration is found in PtMP systems that is not found in PtP systems?
PtMP (Point-to-Multipoint):A single access point (AP) communicates with multiple client devices. This means the AP needs to manage how the available airtime is shared among those clients.
Airtime Fairness:Mechanisms are needed to ensure that:
Each client gets a fair chance to communicate
High-priority traffic isn't starved by low-priority traffic
PtP (Point-to-Point):A dedicated link only has two devices, eliminating the need for complex airtime management.
Considerations in Both:While interference, SINR, and frequency selection are important in both PtMP and PtP systems, the need for airtime management is unique to the multipoint scenario.
References:
Wireless Network Topologies (PtP vs. PtMP):References of the differences in how communication is managed in each scenario.
TDMA (Time Division Multiple Access):A common airtime sharing method used in PtMP systems.
What provides the security (encryption) in an HTTPS connection?
SSL/TLS Secures Web Traffic:HTTPS builds upon HTTP, adding the encryption provided by Secure Sockets Layer (SSL) or its successor, Transport Layer Security (TLS).
Other Protocols Have Different Purposes:
IPSec: Secures IP traffic at a network level, can be used alongside TLS.
SNMPv3: Management protocol, offers security features, but not the primary mechanism in HTTPS.
SSH: Secure remote shell, unrelated to web data encryption.
References:
TLS (and SSL):References of their role in HTTPS and how they provide encryption for web communication.
HTTPS Overview:Materials showing how TLS fits into the overall HTTPS architecture.
What process, used for security in wireless solutions, is defined as the encoding of information to prevent readability by unauthorized users?
Encryption vs. Other Options:
Access Control:Limits who can access data, but doesn't make it unreadable.
Authentication:Validates user/device identity, but not focused on data confidentiality.
Authorization:Determines the actions a user is allowed, separate from securing the data itself.
How encryption works:Encryption uses algorithms and keys to turn plaintext into unreadable ciphertext. Only those with the correct key can decrypt it.
Data in motion vs. data at rest:Encryption protects sensitive information both when transmitted over the wireless network and when stored on devices.
References:
Encryption standards and protocols:Resources on common wireless encryption types (WPA2, WPA3, TLS) and their implementation.
