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Cisco CCNP SWITCH 642-813 Exam Questions with Explanation – Chapter 1(16-20)

Chapter 1 – Implement VLAN based solution, given a network design and a set of requirements

QUESTION NO: 16
Static VLANs are being used on the Company network. What is true about static VLANs?
A. Devices use DHCP to request their VLAN.
B. Attached devices are unaware of any VLANs.
C. Devices are assigned to VLANs based on their MAC addresses.
D. Devices are in the same VLAN regardless of which port they attach to.
Answer: B
Explanation:
LAN port VLAN membership can be assigned manually on a port-by-port basis. When you assign LAN ports to VLANs using this method, it is known as port-based, or static, VLAN membership. Attached devices will be unaware of any VLANs.

QUESTION NO: 17
Two Company switches are connected via a trunk using VTP. Which VTP information does a Catalyst switch advertise on its trunk ports when using VTP? (Select two)
A. STP root status
B. VTP mode
C. Negotiation status
D. Management domain
E. Configuration revision number
Answer: D,E
Explanation:
The role of the VLAN Trunking Protocol (VTP) is to maintain VLAN configuration consistency across the entire network. VTP is a messaging protocol that uses Layer 2 trunk frames to manage the addition, deletion, and renaming of VLANs on a network-wide basis from a centralized switch that is in the VTP server mode. VTP is responsible for synchronizing VLAN information within a VTP domain. This reduces the need to configure the same VLAN information on each switch. Using VTP, each Catalyst Family Switch advertises the following on its trunk ports:

QUESTION NO: 18
The lack of which two prevents VTP information from propagating between switches? (Choose two.)
A. A root VTP server
B. A trunk port
C. VTP priority
D. VLAN 1
E. None of the other alternatives apply
Answer: B,D
Explanation:
In Switch tow types of links are available, access and trunk. The interface is in access mode can carry the information of only one VLAN and trunk can carry the information of more than one VLAN. VTP carry the information of more than one vlan so Switch port should be in trunk mode. VLAN1 is the default VLAN on Cisco Switch, by default all interface belongs to VLAN 1.

QUESTION NO: 19
What is the default VTP advertisement for subset advertisements in Catalyst switches that are in server or client mode?
A. 30 seconds
B. 5 minutes
C. 1 minute
D. 10 seconds
E. 5 seconds
F. None of the other alternatives apply
Answer: B
Explanation:
Periodic ( default is 5 minutes) VTP advertisements are sent out each trunk port with the multicast destination MAC address 01-00-0C-CC-CC-CC. VTP advertisements contain the following configuration information:

QUESTION NO: 20
Refer to the exhibit. VTP has been enabled on the trunk links between all switches within the TEST domain. An administrator has recently enabled VTP pruning. Port 1 on Switch 1 and port 2 on Switch 4 are assigned to VLAN 2. A broadcast is sent from the host connected to Switch 1. Where will the broadcast propagate?
A. Every switch in the network receives the broadcast and will forward it out all ports.
B. Every switch in the network receives the broadcast, but only Switch 4 will forward it out port 2.
C. Switches 1, 2, and 4 will receive the broadcast, but only Switch 4 will forward it out port 2.
D. Only Switch 4 will receive the broadcast and will forward it out port 2.
Answer: C
Explanation:
The default behavior of a switch is to propagate broadcast and unknown packets across the network. This behavior results in a large amount of unnecessary traffic crossing the network. VTP pruning increases bandwidth efficiency by reducing unnecessary flooding of traffic, such as broadcast, multicast, unknown, and flooded unicast packets. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices. By default, VTP pruning is disabled. Enabling VTP pruning on a VTP server enables pruning for the entire management domain. VTP pruning takes effect several seconds after it is enabled. By default, VLANs 2 through 1000 or 2 through 1001 are pruning eligible, depending upon the platform. VTP pruning does not prune traffic from VLANs that are pruning ineligible. VLAN 1 is always pruning ineligible and VLAN 1 cannot be removed from a trunk. However, the “VLAN 1 disable on trunk” feature available on Catalyst 4000, 5000, and 6000 family switches enables the pruning of user traffic, but not protocol traffic such as CDP and VTP, for VLAN 1 from a trunk. Use the vtp pruning command to make VLANs pruning eligible on a Cisco IOS-based switch. Switch(vlan)#vtp pruning Once pruning is enabled, use the switchport trunk pruning command to make a specific VLAN pruning ineligible.
Switch(config)#interface fastethernet 0/3Switch(config-if)#switchport trunk pruning vlan remove vlan 5

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