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BCMSN – Building Converged Cisco Multilayer Switched Networks : 642-812 Exam

Exam Number/Code: 642-812
Exam Name: BCMSN – Building Converged Cisco Multilayer Switched Networks

“Building Cisco Multilayer Switched Networks”, also known as 642-812 exam, is a Cisco certification.
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QUESTION 30:
You are the network administrator of a network with the active VLANs: 1, 2, 3, 4,
10, 20, and 50. However, you only need to carry VLANs 1,2,10 and 20 on a trunk.
Which of the following commands should you use to fulfill this requirement? (Select
all that apply)
A. switchport trunk allowed vlan remove 3,4,50
B. switchport trunk allowed vlan except 3,4,50
C. switchport trunk allowed vlan except 1,2,10,20
D. switchport trunk allowed vlan add 1,2,10,20
E. switchport trunk disallowed vlan remove 3,4,50
F. switchport trunk disallowed vlan add 3,4,50
Answer: A, B, D
Explanation:
switchport trunk allowed vlan vlan_list
The vlan_list format is all | none | [add | remove | except] vlan_atom[,vlan_atom...],
where:
* all specifies all VLANs from 1 to 4094. This keyword is not supported on commands
that do not permit all VLANs in the list to be set at the same time.
* none indicates an empty list. This keyword is not supported on commands that require
certain VLANs to be set or at least one VLAN to be set.
* add adds the defined list of VLANs to those currently set, instead of replacing the list.
* remove removes the defined list of VLANs from those currently set, instead of
replacing the list.
* except lists the VLANs that should be calculated by inverting the defined list of
VLANs.
* vlan_atom is either a single VLAN number from 1 to 4094 or a continuous range of
VLANs described by two VLAN numbers, the lesser one first, separated by a hyphen.
Reference:

http://www.cisco.com/en/US/products/hw/switches/ps663/products_command_reference_chapter09186a008014

QUESTION 31:
When you’re building up a VLAN on a new Certkiller switch, which of the following
are part of the sequence? (Select all that apply)
A. Assign ports.
B. Create VLAN.
C. Create VLAN naming scheme
D. Configure ports for trunking.
E. Remove the trunk when the trunk is no longer needed.
F. Set the baud rate for ports
G. Verify configuration.
Answer: A, B, E, G
Explanation:
To create VLANs on a Catalyst switch, you must first enable the VLAN Trunking
Protocol (VTP). The switch must be in VTP server or transparent mode to do this. VTP
clients can not create VLANs.
The next step is to create the VLAN.
Once the VLAN is created, the final step is to assign individual ports to the VLAN.
After everything is configured, it should be verified.
Incorrect Answers:
Create VLAN naming scheme: A VLAN naming scheme isn’t necessary because VLANs
are numbered by default when they’re created. Note that A VTP domain name must be
created, but the VLANs themselves are not required to be named.
Set the baud rate for ports: The baud rate doesn’t have to be set for ports. Setting baud
rate is for out-of-band console connections.
Configure ports for trunking: This is not required as the VLAN ports can be simply
placed into access mode.
QUESTION 32:
Two Certkiller switches are connected together as shown below:
Certkiller 1 configuration exhibit:
Certkiller 2 configuration exhibit:
Based on the information shown above, which three statements are true? (Select
three)
A. DTP packets are sent from Switch Certkiller 2.
B. DTP is not running on Switch Certkiller 1.
C. Only VLANs 1-1001 will travel across the trunk link.
D. A trunk link will be formed.
E. The native VLAN for Switch Certkiller 2 is vlan 1.
Answer: A, D, E

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