The Company switches are configured to use VTP. Whats true about the VLAN trunking protocol (VTP)? (Choose two)
A.
VTP messages will not be forwarded over nontrunk links.
B.
VTP domain names need to be identical. However, case doesn’t matter.
C.
A VTP enabled device which receives multiple advertisements will ignore advertisements with higher configuration revision numbers.
D.
A device in "transparent" VTP v.1 mode will not forward VTP messages.
E.
VTP pruning allows switches to prune VLANs that do not have any active ports associated with them.
Explanation:
VTP messages are only transmitted across trunk links. If the receiving switch is in transparent mode, the configuration is not changed. Switches in transparent mode do not participate in VTP. If you make VTP or VLAN configuration changes on a switch in transparent mode, the changes are not propagated to the other switches in the network.
Incorrect Answers:
B: The VTP domain name is case sensitive and it must be identical with the domain name configured on the VTP server.
C: This is incorrect because if a VTP client receives an advertisement with a higher revision number, it won’t ignore it. In fact, the advertisement with a higher revision level takes precedence when the switch is configured in client mode.
E: VTP pruning enhances network bandwidth use by reducing unnecessary flooded 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. It does not prune the individual VLANs.
I think the right answers are A and E.
D is incorrect because device in “transparent” VTP v1 will forward VTP messages, but match VTP version and domain name before forwarding.
Thanks.
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E: VTP pruning enhances network bandwidth use by reducing unnecessary flooded 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. It does not prune the individual VLANs.
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Sorry, but VTP prunning reduces unnecessary traffic by pruning individual VLANs.
” VTP pruning allows the switch to not forward user traffic for VLANs that are not active on a remote switch. This feature dynamically prunes unneeded traffic across trunk links. If the VLAN traffic is needed at a later date, VTP will dynamically add the VLAN back to the trunk.”
http://www.ciscopress.com/articles/article.asp?p=29803&seqNum=4
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E is correct:
From ciscopress CCNP Switch Official Certification Guide: P97: “Version-dependent transparent mode—In transparent mode, VTP version 1
matches the VTP version and domain name before forwarding the information to other switches using VTP. VTP version 2 in transparent mode forwards the VTP messages without checking the version number. Because only one domain is supported in a switch, the domain name doesn’t have to be checked.”
and P101:
“Figure 5-5shows the network from Figure 5-4with VTP pruning enabled. Because Catalyst B has not advertised its use of VLAN 3, Catalyst A will prune VLAN 3 from the trunk to B and will choose not to flood VLAN 3 traffic to Catalyst B over the trunk link. Catalyst D has advertised the need for VLAN 3, so traffic will be flooded to it.”
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