Cisco BCMSN Building Converged Cisco Multilayer Switched Networks Set 1

Question - 15 Maximum mark : - 25

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Cisco BCMSN Building Converged Cisco Multilayer Switched Networks Set 1

Which statement is true about IP telephony calls?

A Voice over IP (VoIP) packet consists of the voice payload, IP header, TCP header, RTP header, and

Layer 2 link header. ✘ The voice carrier stream uses H.323 to set up, maintain, and tear down call endpoints. ✘ Call control signaling uses Real-Time Transport Protocol (RTP) packets that contain actual voice samples. ✘ The sum of bandwidth necessary for each major application, including voice, video, and data, should notexceed 75 percent of the total available bandwidth for each link. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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

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

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which issue or set of issues does the Lightweight Access Point Protocol (LWAPP) address?

reduction of processing in wireless controllers ✘ distributed approach to authentication, encryption, and policy enforcement ✘ provides security by blocking communication between access points and wireless clients ✘ access point discovery, information exchange, and configuration ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

In each option, a Layer 2 security attack is specified. Which statement correctly matches the correct mitigation technique with the specified Layer 2 switch attack?

Configure DHCP spoofing to mitigate ARP address spoofing attacks. ✘ Configure DHCP spoofing to mitigate DHCP spoofing attacks. ✘ Configure PVLANs to mitigate MAC address flooding attacks. ✘ Configure port security to mitigate MAC address flooding attacks. ✔ Enable root guard to mitigate ARP address spoofing attacks. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which description correctly describes a MAC address flooding attack?

Frames with unique, invalid source MAC addresses flood the switch and exhaust CAM table space. Theresult is that new entries cannot be inserted because of the exhausted CAM table space, and traffic is

subsequently flooded out all ports. ✘ The attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking devicethen becomes the source address found in the Layer 2 frames sent by the valid network device. ✘ The attacking device spoofs a destination MAC address of a valid host currently in the CAM table. Theswitch then forwards frames destined for the valid host to the attacking device. ✘ The attacking device spoofs a source MAC address of a valid host currently in the CAM table. The switchthen forwards frames destined for the valid host to the attacking device. ✔ Frames with unique, invalid destination MAC addresses flood the switch and exhaust CAM table space. Theresult is that new entries cannot be inserted because of the exhausted CAM table space, and traffic is
subsequently flooded out all ports. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

A client is searching for an access point (AP). What is the correct process order that the client and access point go through to create a connection?

probe request/response, authentication request/response, association request/response ✘ association request/response, authentication request/response, probe request/response ✘ probe request/response, association request/response, authentication request/response ✘ association request/response, probe request/response, authentication request/response ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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

The processing of 802.11 data and management protocols and access point capabilities is distributed

between a lightweight access point and a centralized WLAN controller. ✘ LWAPP aggregates radio management forward information and sends it to a wireless LAN solution engine. ✘ LWAPP authenticates all access points in the subnet and establishes a secure communication channel witheach of them. ✘ LWAPP advertises its WDS capability and participates in electing the best WDS device for the wirelessLAN. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which statement describes the function of a trust boundary?

Trust boundaries determine whether certain types of traffic can pass. ✘ Trust boundaries are a point in the network where decisions about CoS markings on incoming packets aremade. ✘ Trust boundaries are a point in the network where QoS functionality begins and ends. ✘ Trust boundaries are points in the network where Layer 2 CoS markings are converted to Layer 3 DSCP orIP precedence markings. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

Which statement is true about utilizing a data network for voice traffic?

Adding bandwidth to the data network is the primary solution to provide for the needs of voice traffic. ✘ Because voice traffic volume cannot be calculated, network bandwidth requirements must be determinedfrom an existing installation. ✘ Voice traffic will require some form of QoS mechanisms in most networks. ✘ Voice traffic will require some form of QoS implementation only in congested networks. ✔ Network congestion must be totally eliminated to provide proper voice traffic performance. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

10.

A Cisco Aironet Wireless LAN Adapter CB21AG is inserted into a PC cardbus slot. Both the green status LED and the amber activity LED are blinking slowly. What is the condition of the adapter?

The adapter is not receiving power. ✘ The adapter is in power save mode. ✘ The adapter is scanning for the wireless network for which it is configured. ✘ The adapter is associated to an access point or another client. ✔ The adapter is transmitting or receiving data while associated to an access point or another client. ✔

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Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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Cisco BCMSN Building Converged Cisco Multilayer Switched Networks Set 1

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