單項選擇題

Which statement about the Lightweight Access Point Protocol （LWAPP） is true？（）

A. LWAPP encrypts control traffic between the AP and the controller.
B. LWAPP encrypts user traffic with a x.509 certificate using AES-CCMP
C. LWAPP encrypts both control traffic and user data.
D. When set to Layer 3， LWAPP uses a proprietary protocol to communicate with the Cisco Aironet APs.

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單項選擇題

Which statement is true about IP telephony calls？（）

A. A Voice over IP （VoIP） packet consists of the voice payload， IP header， TCP header， RTP header， and Layer 2 link header.
B. The voice carrier stream uses H323 to set up， maintain， and tear down call endpoints.
C. Call control signaling uses Real-Time Transport Protocol （RTP） packets that contain actual voice samples.
D. The sum of bandwidth necessary for each major application， including voice， video， and data， should not exceed 75 percent of the total available bandwidth for each link.

多項選擇題

Which three statements are true about the voice VLAN feature on a Catalyst 2950 switch？（Choose three.）（）

A. The CoS value is trusted for 802.1p or 802.1q tagged traffic.
B. The voice VLAN feature is disabled by default.
C. The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS value to 4.
D. When the voice VLAN feature is enabled， all untagged traffic is sent according to the default CoS priority of the port.
E. PortFast is automatically disabled when a voice VLAN is configured.
F. The default CoS value for incoming traffic is set to 0.

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Which statement about the Lightweight Access Point Protocol （LWAPP） is true？（）

你可能感興趣的試題

Which statement is true about IP telephony calls？（）

Which three statements are true about the voice VLAN feature on a Catalyst 2950 switch？ （Choose three.）（）

Which statement is true about IP telephony calls？（）

Which three statements are true about the voice VLAN feature on a Catalyst 2950 switch？（Choose three.）（）