Instantly download 642-813 training test engine

A campus infrastructure supports wireless clients via Cisco Aironet AG Series 1230, 1240, and 1250 access points. With DNS and DHCP configured, the 1230 and 1240 access points appear to boot and operate normally. However, the 1250 access points do not seem to operate correctly.
What is the most likely cause of this problem?

• A. PoE
• B. switch port does not support gigabit speeds
• C. DNS
• D. DHCP with option 150
• E. DHCP with option 43

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When configuring port security on a Cisco Catalyst switch port, what is the default action taken by the switch if a violation occurs?

• A. shut down (access or trunk port)
• B. transition (the access port to a trunking port)
• C. restrict (increment SecurityViolation counter)
• D. protect (drop packets with unknown source addresses)

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What is the effect of applying the switchport trunk encapsulation dot1q command to a port on a Cisco Catalyst switch?

• A. By default, native VLAN packets going out this port are tagged.
• B. If the device connected to this port is not 802.1Q-enabled, it is unable to handle 802.1Q packets.
• C. The interface supports the reception of tagged and untagged traffic.
• D. Without an encapsulation command, 802.1Q is the default encapsulation if DTP fails to negotiate a trunking protocol.

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DRAG DROP
This is a drag and drop question which is about the correct sequence of steps that a wireless client takes during the process of association with an access point (AP). Drag the items to the proper locations.

Explanation:
1.Client sends probe request.
2.Access point sends probe response.
3.Client initiates association.
4.Access point accepts association.
5.Access point adds client MAC address to association table
References http://www.cisco.com/en/US/tech/tk722/tk809/technologies_white_paper09186a0080901caa.shtml
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_white_paper09186a0080901caa.shtml

DRAG DROP

Explanation:

After the bridges have determined which ports are Root Ports, Designated Ports, and non-
Designated Ports, STP is ready to create a loop-free topology. To do this, STP configures Root
Ports and Designated Ports to forward traffic. STP sets non-Designated Ports to block traffic.
Although Forwarding and Blocking are the only two states commonly seen in a stable network,
there are actually five STP states.
This list can be viewed hierarchically in that bridge ports start at the Blocking state and work their
way up to the Forwarding state. The Disabled state is the administratively shutdown STP state. It
is not part of the normal STP port processing. After the switch is initialized, ports start in the
Blocking state. The Blocking state is the STP state in which a bridge listens for BPDUs.
A port in the Blocking state does the following:
Discards frames received from the attached segment or internally forwarded through switching
Receives BPDUs and directs them to the system module
Has no address database
Does not transmit BPDUs received from the system module
Receives and responds to network management messages but does not transmit them If a bridge thinks it is the Root Bridge immediately after booting or in the absence of BPDUs for a certain period of time, the port transitions into the Listening state. The Listening state is the STP state in which no user data is being passed, but the port is sending and receiving BPDUs in an effort to determine the active topology. A port in the Listening state does the following:
Discards frames received from the attached segment or frames switched from another port
Has no address database
Receives BPDUs and directs them to the system module
Processes BPDUs received from the system module (Processing BPDUs is a separate action from receiving or transmitting BPDUs)
Receives and responds to network management messages It is during the Listening state that the three initial convergence steps take place - elect a Root Bridge, elect Root Ports, and elect Designated Ports. Ports that lose the Designated Port election become non-Designated Ports and drop back to the Blocking state. Ports that remain Designated Ports or Root Ports after 15 seconds - the default Forward Delay STP timer value - progress into the Learning state. The lifetime of the Learning state is also governed by the Forward Delay timer of 15 seconds, the default setting. The Learning state is the STP state in which the bridge is not passing user data frames but is building the bridging table and gathering information, such as the source VLANs of data frames. As the bridge receives a frame, it places the source MAC address and port into the bridging table. The Learning state reduces the amount of flooding required when data forwarding begins.
A port in the Learning state does the following:
If a port is still a Designated Port or Root Port after the Forward Delay timer expires for the Learning state, the port transitions into the Forwarding state. The Forwarding state is the STP state in which data traffic is both sent and received on a port. It is the "last" STP state. At this stage, it finally starts forwarding user data frames. A port in the Forwarding state does the following:
Reference:
CCNP BCMSN Official Exam Certification Guide, Fourth Edition, Chapter 8: Traditional Spanning Tree Protocol, IEEE 802.1D Overview, p. 197