Important CWNP CWISA-102 CWISA Exam Questions

Answer: D

Explanation:

PoE Splitter:A PoE splitter separates power and data from a PoE-enabled Ethernet cable, allowing the powering of non-PoE devices.

Other PoE Devices:

PoE Injector:Adds power to non-PoE Ethernet cable.

PoE Switch:Provides power directly through its ports.

Answer: D

Explanation:

Requirements Drive Decisions:The decision between wired or wireless must align with the solution's overall purpose, performance targets, and operational constraints.

Key Considerations:

Reliability:Does the application require guaranteed connectivity? (Wired may be favored).

Installation Cost:Can extensive cabling be done, or is it prohibitively expensive? (Wireless may be favored).

Flexibility and Scalability:Is node placement likely to change in the future? (Wireless may be favored).

Other Factors are Important, But Secondary:Distance, PoE availability, specific applications all matter, but they are assessedwithin the contextof the overarching business needs.

References:

Wireless vs. Wired Network Design:Comparisons of pros and cons, highlighting how use cases guide the choice.

IoT Solution Planning:Materials on defining requirementsbeforeselecting technology.

Answer: C

Explanation:

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.

Answer: C

Explanation:

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.

Answer: B

Explanation:

LoRa:This refers to the underlying radio modulation technique using Chirp Spread Spectrum (CSS). It defines how data is physically encoded onto the wireless signal.

LoRaWAN:This is the network protocol built on top of LoRa. It manages device communication, network topology, and aspects like security. It operates at the MAC sublayer of the Data Link layer (Layer 2) of the OSI model

LoRa vs. LoRaWAN:Key takeaway is that LoRa is the physical layer technology, while LoRaWAN adds the networking layer for management.

References:

LoRa Modulation:Technical explanations of Chirp Spread Spectrum (CSS).

LoRaWAN Specification:Official documentation detailing the network architecture and MAC layer functions.

OSI Model:Descriptions of the Data Link layer and its role in networking.