• Key Modulation Differences:

References

• ASK: https://en.wikipedia.org/wiki/Amplitude-shift_keying
• FSK: https://en.wikipedia.org/wiki/Frequency-shift_keying

• Authentication: Verifying "who" the user or device is (e.g., via passwords, certificates).
• Authorization: Controlling "what" a user or device can do once authenticated (e.g., read-only vs. read/write permissions).
• Combined for Security: Both are essential. Authentication alone doesn't control access levels, and authorization without verification is meaningless.

References:

• Identity and Access Management (IAM): Articles and resources outlining the core principles of authentication and authorization.
• Cybersecurity Best Practices: Guides on securing systems will often emphasize the need for both authentication and authorization controls.

• WWAN (Wide-Area Wireless Network): WWANs provide connectivity over extensive geographic areas, typically covering regions or even entire countries.
• Cellular Technology: WWANs often rely on cellular networks (3G, 4G, 5G) offered by mobile carriers.

References

• WWAN: https://en.wikipedia.org/wiki/Wireless_wide_area_network