Answers to Review Questions
347
13.
C. 802.1Q was created to allow trunked links between disparate
switches.
14.
A, D. Trunks are used to carry VLAN information between switches.
15.
B, C. When a frame traverses a trunked link, it is encapsulated in ISL
information. The ISL information is removed before the frame is sent
down an access link.
16.
D. Access links only carry information about one VLAN.
17.
D. 802.1Q is the IEEE standard for identifying VLANs as they cross
a trunked link.
18.
D. This question is a little vague, but the best answer is that the
VLAN membership for the port is not configured.
19.
B. The typical reason for creating network segmentation is to provide
more bandwidth to each user.
20.
B. Cisco created frame tagging to be used when an Ethernet frame
traverses a trunked link.
21.
C. Frame tagging is the process of identifying frames as they traverse
a trunked link. Cisco uses the propriety ISL version, where 802.1Q is a
nonproprietary version.
22.
A, C. ISL is a Cisco proprietary frame-tagging method. IEEE 802.1Q
is the nonproprietary version of frame tagging.
23.
A, C, D. If you are not providing a type of inter-VLAN routing, then
hosts not in the same VLAN will not be able to communicate. HostA
and HostB can communicate, and HostG and HostH can communi-
cate, but HostA and B cannot communicate to HostG and HostH.
24.
A, B, D. To establish a VLAN, you must first create the VLAN, name
it, and then add the VLAN to the desired ports of a switch. Since the
Network layer protocol is irrelevant to the VLAN, the IP address
answer is not correct.
25.
B. VLAN Trunking Protocol is responsible for distributing and syn-
chronizing information about configured VLANs between switches
throughout the network. VTP manages additions, deletions, and name
changes for network VLANs.
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