N10-005 Question #662: Real Exam Question with Answer & Explanation

The correct answer is A: PoE and QoS. PoE (Power over Ethernet) and QoS are the two most critical switch features when supporting VoIP phones and wireless access points because they address power delivery and voice traffic prioritization respectively.

Question

Zach, a network administrator, needs to purchase a new switch to support VoIP phones and wireless access points in a new building. Which of the following features are the MOST important for the new switch to support?

Options

APoE and QoS
BLACP and OSPF
C802.1x and 802.11n
DNAT and VTP

Explanation

PoE (Power over Ethernet) and QoS are the two most critical switch features when supporting VoIP phones and wireless access points because they address power delivery and voice traffic prioritization respectively.

Common mistakes.

B. LACP (link aggregation) and OSPF (a routing protocol) are useful in core network design but are not the primary requirements for a switch serving VoIP endpoints and WAPs.
C. 802.1x is port-based authentication and 802.11n is a wireless standard - neither is a switch-level feature directly needed to support VoIP phones or WAPs receiving power.
D. NAT (address translation) is typically a router or firewall function, and VTP (VLAN Trunking Protocol) is a VLAN management protocol - neither is the most important feature for this deployment scenario.

Concept tested. PoE and QoS switch features for VoIP and WAP support

Reference. https://www.cisco.com/c/en/us/solutions/enterprise-networks/what-is-poe.html

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