Which two best practices should be considered when a customer wants to purchase and implement Voice over Wireless for Cisco 7925 IP Phones? (Choose two.)

Question

Options

• AEnable lower data rates for 2.4-GHz data WLAN and higher data rates for phones.
• BUse a separate Cisco Wireless Lan Controller.
• CEnable 802.1x and Cisco Centralized Key Management for phone authentication.
• DUse dedicated Access Points only for Voice over Wireless.
• ESet data for 2.4 GHz and voice for 5 GHz using separate SSIDs.

• A
  17% (4)
• B
  4% (1)
• C
  75% (18)
• D
  4% (1)

Explanation

Two best practices for deploying Cisco 7925 IP Phones on a WLAN are: (C) Enable 802.1x with Cisco Centralized Key Management (CCKM) - CCKM enables fast secure roaming by caching keys on the controller, allowing the phone to roam between APs in under 150ms without full re-authentication, which is critical for maintaining active voice calls; and (E) Use separate SSIDs with data on 2.4 GHz and voice on 5 GHz - the 5 GHz band provides more non-overlapping channels, less interference, and supports 40 MHz channel bonding, all of which improve voice quality. The other options are incorrect: lower data rates should be disabled (not specially enabled) for voice; a separate WLC is not required; and dedicating APs exclusively to voice is impractical and not a Cisco best-practice recommendation.

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