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CWNP CWSP-208學習資料 - CWSP-208考試重點
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CWNP CWSP-208 考試大綱:
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CWSP-208考試重點 - CWSP-208最新試題
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最新的 CWNP CWSP CWSP-208 免費考試真題 (Q83-Q88):
問題 #83
For a WIPS system to identify the location of a rogue WLAN device using location patterning (RF fingerprinting), what must be done as part of the WIPS installation?
- A. At least six antennas must be installed in each sensor.
- B. The RF environment must be sampled during an RF calibration process.
- C. A location chipset (GPS) must be installed with it.
- D. All WIPS sensors must be installed as dual-purpose (AP/sensor) devices.
答案:B
解題說明:
For a WIPS system to perform location patterning (also called RF fingerprinting), it must first perform an RF calibration or RF site survey. This process involves sampling signal strengths from known locations to develop a model of how signals propagate in the environment. This "fingerprint" is then used to triangulate or estimate the positions of rogue devices.
問題 #84
You must locate non-compliant 802.11 devices. Which one of the following tools will you use and why?
- A. A protocol analyzer, because it can be used to view the spectrum energy of non-compliant 802.11 devices, which is always different from compliant devices.
- B. A spectrum analyzer, because it can decode the PHY preamble of a non-compliant device.
- C. A spectrum analyzer, because it can show the energy footprint of a device using WPA differently from a device using WPA2.
- D. A protocol analyzer, because it can be used to report on security settings and regulatory or rule compliance
答案:D
解題說明:
In a security context, outdated firmware is one of the most critical vulnerabilities. Firmware updates typically patch known security issues, fix bugs, and provide new features or improved encryption support. If the APs have not been updated or checked in over 18 months, they could be running firmware with known exploits or lacking critical security patches, making firmware review a top priority.
References:
CWSP-208 Study Guide, Chapter 8 - WLAN Security Lifecycle and Maintenance CWNP CWSP-208 Objectives: "Firmware and Security Patch Management"
問題 #85
The IEEE 802.11 Pairwise Transient Key (PTK) is derived from what cryptographic element?
- A. Group Temporal Key (GTK)
- B. Phase Shift Key (PSK)
- C. Key Confirmation Key (KCK)
- D. Pairwise Master Key (PMK)
- E. PeerKey (PK)
- F. Group Master Key (GMK)
答案:D
解題說明:
The PTK (Pairwise Transient Key) is derived during the 4-Way Handshake using:
PMK (from PSK or EAP authentication)
ANonce and SNonce (nonces from authenticator and supplicant)
MAC addresses of client and AP
The PTK is then split into keys used for encryption and integrity protection.
Incorrect:
A). PSK can derive the PMK, but not the PTK directly.
B). GMK is used to derive the GTK, not PTK.
D). GTK is for group traffic encryption.
E & F. PK and KCK are components of PTK or alternate key usage-not used to derive PTK.
References:
CWSP-208 Study Guide, Chapter 3 (PTK Derivation and Usage)
IEEE 802.11i-2004 Key Hierarchy
問題 #86
Joe's new laptop is experiencing difficulty connecting to ABC Company's 802.11 WLAN using 802.1X/EAP PEAPv0. The company's wireless network administrator assured Joe that his laptop was authorized in the WIPS management console for connectivity to ABC's network before it was given to him. The WIPS termination policy includes alarms for rogue stations, roque APs, DoS attacks and unauthorized roaming.
What is a likely reason that Joe cannot connect to the network?
- A. Joe configured his 802.11 radio card to transmit at 100 mW to increase his SNR. The WIPS is detecting this much output power as a DoS attack.
- B. Joe disabled his laptop's integrated 802.11 radio and is using a personal PC card radio with a different chipset, drivers, and client utilities.
- C. Joe's integrated 802.11 radio is sending multiple Probe Request frames on each channel.
- D. An ASLEAP attack has been detected on APs to which Joe's laptop was trying to associate. The WIPS responded by disabling the APs.
答案:B
解題說明:
WIPS systems often enforce policies based on MAC addresses and associated hardware fingerprints. If Joe uses a different wireless adapter than the one authorized, it may trigger a rogue device or unauthorized client alarm-even if it's the same laptop. This behavior is common in environments with strict WIPS enforcement policies.
問題 #87
What TKIP feature was introduced to counter the weak integrity check algorithm used in WEP?
- A. Sequence counters
- B. Block cipher support
- C. RC5 stream cipher
- D. 32-bit ICV (CRC-32)
- E. Michael
答案:E
解題說明:
TKIP (used with WPA) introduced "Michael" as a message integrity check (MIC) algorithm to replace the insecure CRC-32 used in WEP. Michael:
Adds tamper protection to each packet.
Helps detect packet forgery.
Incorrect:
A). CRC-32 was used in WEP and proven weak.
B). Sequence counters help prevent replay attacks, not integrity checking.
C). RC5 is not used in WLAN security.
E). TKIP does not support block ciphers-it uses RC4, a stream cipher.
References:
CWSP-208 Study Guide, Chapter 3 (TKIP Security Features)
問題 #88
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