Which of the following is a well-known vulnerability of WEP?

Lack of any encryption mechanism

Use of a 256-bit key that is too long

Weak initialization vectors (IVs) that can be reused

Inability to authenticate clients

A manufacturing plant has legacy barcode scanners that only support WEP. The plant cannot replace the scanners immediately, but they must protect the wireless network from casual eavesdropping. What is the most appropriate interim measure?

Enable WPA2-Personal on the same SSID and let the scanners fall back to WEP.

Use WEP with a 128-bit key and change it daily.

Disable encryption and rely on MAC filtering.

Isolate the WEP-enabled devices on a separate VLAN with no internet access and plan a phased replacement.

A small business has older Wi-Fi devices that do not support WPA2. They are currently using WEP and want to improve security without replacing hardware. Which option is the best upgrade path?

Keep WEP but increase the key length to 128 bits

Use open authentication with MAC filtering

Which of the following is a key improvement of WPA over WEP?

It uses a static key that never changes

It adds a message integrity check (MIC)

It eliminates the need for authentication

It uses a longer IV of 128 bits

A company is deploying a new Wi-Fi network for a bring-your-own-device (BYOD) environment. They want to avoid the risk of offline dictionary attacks against weak passphrases while still using a simple shared password for guests. Which configuration best meets this requirement?

WPA2-Personal with a 20-character random passphrase

WPA with TKIP and a long passphrase

EC-CouncilNetwork Defense Essentials

Domain 5Objective 2

Wireless Encryption and Authentication Mechanisms NDE Practice Questions (Page 6)

Part of the Wireless, Mobile, and IoT Security domain, which makes up ~17% of our current practice bank.

52questions here

11free pages

10concepts

Questions 26–30

26foundation · easy
Which of the following is a well-known vulnerability of WEP?
Select an answer first
27application · medium
A manufacturing plant has legacy barcode scanners that only support WEP. The plant cannot replace the scanners immediately, but they must protect the wireless network from casual eavesdropping. What is the most appropriate interim measure?
Select an answer first
28application · medium
A small business has older Wi-Fi devices that do not support WPA2. They are currently using WEP and want to improve security without replacing hardware. Which option is the best upgrade path?
Select an answer first
29foundation · easy
Which of the following is a key improvement of WPA over WEP?
Select an answer first
30application · medium
A company is deploying a new Wi-Fi network for a bring-your-own-device (BYOD) environment. They want to avoid the risk of offline dictionary attacks against weak passphrases while still using a simple shared password for guests. Which configuration best meets this requirement?
Select an answer first

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