READ Free Dumps For Cisco- 200-125

Question ID 13541	Which two link protocols are used to carry multiple VLANs over a single link? (Choose two.)
Option A	VTP
Option B	802.1q
Option C	IGP
Option D	ISL
Option E	802.3u
Correct Answer	B,D

Explanation Explanation: Cisco switches can use two different encapsulation types for trunks, the industry standard 802.1q or the Cisco proprietary ISL. Generally, most network engineers prefer to use 802.1q since it is standards based and will interoperate with other vendors.

Question ID 13542	Which two of these are characteristics of the 802.1Q protocol? (Choose two.)
Option A	It is used exclusively for tagging VLAN frames and does not address network reconvergence following switched network topology changes.
Option B	It modifies the 802.3 frame header, and thus requires that the FCS be recomputed.
Option C	It is a Layer 2 messaging protocol which maintains VLAN configurations across networks.
Option D	It includes an 8-bit field which specifies the priority of a frame.
Option E	It is a trunking protocol capable of carrying untagged frames.
Correct Answer	B,E

Explanation Explanation: 802.1Q protocol, or Virtual Bridged Local Area Networks protocol, mainly stipulates the realization of the VLAN. 802.1Q is a standardized relay method that inserts 4 bytes field into the original Ethernet frame and re-calculate the FCS. 802.1Q frame relay supports two types of frame: marked and non-marked. Non-marked frame carries no VLAN identification information.

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