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Braindumps of 642-812
Building Converged Cisco Multilayer Switched Networks

Exam Questions, Answers, Braindumps (642-812)

Hi everyone! 642-812 is cleared. I got material from www.exams.ws and succedded. Here are some of my questions as braindumps.

Question No: 1
You need to design the VLAN scheme for the Abc network. Which two statements are true about best practices in VLAN design? (Select two)
A. Routing should occur at the access layer if voice VLANs are utilized. Otherwise, routing should occur at the distribution layer.
B. Routing should always be performed at the distribution layer.
C. VLANs should be localized to a switch.
D. VLANs should be localized to a single switch unless voice VLANs are being utilized.
E. Routing should not be performed between VLANs located on separate switches.
Answer: B, C
Explanation:
In the distribution layer, uplinks from all access layer devices are aggregated, or come together. The distribution layer switches must be capable of processing the total volume of traffic from all the connected devices. These switches should have a port density of high-speed links to support the collection of access layer switches.
VLANs and broadcast domains converge at the distribution layer, requiring routing, filtering, and security. The switches at this layer must be capable of performing multilayer switching with high throughput. Only certain Catalyst switch models can provide multilayer switching; be sure to understand which ones can do this.
A switched environment offers the technology to overcome flat network limitations.
Switched networks can be subdivided into VLANs. By definition, a VLAN is a single broadcast domain. All devices connected to the VLAN receive broadcasts from other VLAN members. However, devices connected to a different VLAN will not receive those same broadcasts. (Naturally, VLAN members also receive unicast packets directed toward them from other VLAN members.)
A VLAN consists of defined members communicating as a logical network segment. In contrast, a physical segment consists of devices that must be connected to a physical cable segment. A VLAN can have connected members located anywhere in the campus network, as long as VLAN connectivity is provided between all members. Layer 2 switches are configured with a VLAN mapping and provide the logical connectivity between the VLAN members.

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Question No: 2
You work as a network technichian at Abc .com. Your boss, Mrs. Abc, is interested in Catalyst 2950 switches, in particular the voice VLAN feature. What should you tell her? Select 3.
A. PortFast is is automatically disable when a voice VLAN is configured.
B. The CoS value is trusted for 802.1p or 802.1q tagged traffic.
C. The default CoS value for incoming traffic is set to 0.
D. The voice VLAN feature is disable by default.
E. When the voice VLAN features is enabled, all untagged traffic is sent according to the default CoS priority of the port.
F. The IP phone accepts the priority of all tagged and untagged traffic and sets the CoS vale to 4.
Answer: B,C,E

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Question No: 3
You work as a network technichian at Abc .com. Your boss, Mrs. Abc, is interested in switch spoofing. She asks you how the attacker how the attacker would collect information with VLAN hoping through switch spoofing. What should you tell her?
That the attacking station...
A. ...uses VTP to collect VLAN information that is sent out and then tags itself with the domain information in order to capture the data.
B. ...will generate frames with two 802.1Q headers to cause the switch to forward the frames to a VLAN that would be inaccessible to the attacker through legitimate means.
C. ...uses DTP to negotiate trunking with a switch port and captures all traffic that is allowed on the trunk.
D. ...tags itself with all usable VLANs to capture data that is passed throuogh the switch, regardless of the VLAN to which the data belongs.
Answer: C

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Question No: 4
You work as a network technichian at Abc .com. Your boss, Ms. Abc, is interested LWAPP (Lightweight Access Point Protocol). In particular she wants to know which type of activities this protocol defines. What should you tell her? Select two.
A. Layer 3 addressing and distribution
B. SNMP monitoring services
C. Access point certification and software control
D. Packet encapsulation, fragmentation, and formatting
E. Compression and Layer 3 address mapping
Answer: C,D

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Question No: 5
You work as a network technichian at Abc .com. Your boss, Ms. Abc, is interested in the WLAN client utility. What should you tell her? Select two.
A. The Aironet Desktop Utility (ADU) can be used to enable or disable the adapter radio and to configure LEAP authentication with dynamic WEP.
B. In Windows XP environment, a client adapter can only be configured and managed with the Microsoft Configuration Manager.
C. The Microsoft Wireless Configuration Manager can be configured to display the Aironet System Tray Utility (ASTU) icon in the Windows system tray.
D. The Cisco Aironet Desktop Utility (ADU) and the Microsoft Wirelss Configuration Manager can both be enabled at the same time to setup WLAN client cards.
Answer: A,C

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642-812

 

 

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