You are the network administrator tasked with designing a switching solution for the
Company network. Which of the following statements describing trunk links are
INCORRECT? (Select all that apply)
A.
The trunk link belongs to a specific VLAN.
B.
Multiple trunk links are used to connect multiple end user devices.
C.
A trunk link only supports native VLAN.
D.
Trunk links use 802.10 to identify a VLAN.
E.
The native VLAN of the trunk link is the VLAN that the trunk uses for untagged packets.
Explanation:
A trunk is a point-to-point link that transmits and receives traffic between switches or
between switches and routers. Trunks carry the traffic of multiple VLANs and can extend
VLANs across an entire network. 100BaseT and Gigabit Ethernet trunks use Cisco ISL (the
default protocol) or industry-standard IEEE 802.1Q to carry traffic for multiple VLANs over a
single link. Frames received from users in the administratively-defined VLANs are identified
or tagged for transmission to other devices. Based on rules you define, a unique identifier
(the tag) is inserted in each frame header before it is forwarded. The tag is examined and
understood by each device before any broadcasts or transmission to other switches, routers,
or end stations. When the frame reaches the last switch or router, the tag is removed before
the frame is transmitted to the target end station.
Incorrect Answers:
E: This statement is true, as untagged frames are always used with the native VLAN. The
native VLAN is VLAN 1 by default in Cisco switches.