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Chapter 3

VLANs

11.

A, B, D, E. VLAN Trunk Protocol is used to update switches within
a domain about configured VLANs. This includes the management
domain name and configuration revision number so that receiving
switches know if new VLAN information (including configured
parameters) has been added to the VTP database and all of the VLANs
the switch knows about.

12.

B. VTP pruning stops VLAN information from traversing a trunked
link if it would be discarded on the remote end because no VLANs are
configured on the switch.

13.

A. Inter-Switch Link (ISL) encapsulates a new header and trailer to
an existing data frame.

14.

A. VTP transparent switches do not update their VTP database with
VLAN information received on trunked links. However, they will for-
ward these updates.

15.

C. 802.1q does not encapsulate a data frame as ISL does. Instead, it
puts a new field into the existing frame to identify the VLAN the
packet belongs to.

16.

B. VTP domain names can be up to 32 characters and must be the
same on all switches with which you want to share VLAN information.

17.

C. The 1900 switches use port A to reference interface 0/26 and B to
reference interface 0/27.

18.

B, C, D, E, F, G, H. VTP does not have anything to do with breaking
up or configuring broadcast domains. All answers except A are correct.

19.

A. If you change the VTP version on one switch, all other switches
will be changed automatically if they support the new version.

20.

D. Trunked links, by default, are assigned to forward all VLANs.
You must delete these by hand if you don't want all VLANs to be sent
down a trunked link.

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