What action will be taken when an MPLS router receives a frame with a label that does not exist in the LFIB?
A. The frame will be flooded.
B. The frame will be discarded.
C. The frame will be fragmented.
The service mtu of a VPLS is set to 9100. What is the recommended MTU value that can be set for the access port assuming dot1q encapsulation?
A. 9100
B. 9104
C. 9108
D. 9122
E. 9126
In IEEE 802.1ag, which two key functions are configured on bridge ports (SAPs and SDPs) to support CFM messages? (Choose 2)
A. MEP
B. MAP
C. MIP
D. MUP
How does PBB forward broadcast, unknown-unicast and multicast traffic from a B-VPLS to an l-VPLS?
A. The receiving PE checks the l-TAG in the l-SID to determine if there is a local l-VPLS on the node.
B. The receiving PE checks the l-SID in the l-TAG to determine if there is a local l-VPLS on the node.
C. The receiving PE checks the service label in the mpls header to determine if there is a local l- VPLS on the node.
D. The receiving PE checks the multicast B-DA to see if an l-SID has been mapped to the B-DA that matches a local l-VPLS on the node.
An MC-LAG is configured with default parameters. When a failed interface recovers, the active link reverts to the restored interface.
A. TRUE
B. FALSE
Which of the following is a true statement?
A. The lower the age-time, the greater the amount of flooding
B. The higher the age-time, the greater the amount of flooding.
C. The lower the age-time, the lower the amount of flooding.
D. There is no relationship between the age-time and the amount of flooding.
In RSTP, how is the root bridge selected?
A. The switch with the highest bridge-id is selected as root.
B. The switch with the lowest bridge-id is selected as root.
C. The switch with the highest MAC address is selected as root
D. The switch with the lowest MAC address is selected as root.
Which of the following needs to be considered when designing Ethernet networks with redundancy?
A. Processing the TTL takes extra time.
B. MAC learning rate is doubled.
C. FDB size is doubled.
D. Requires a protocol to remove loops.
After the "disable-learning" command has been executed at the VPLS level, a new client device originates a frame. What is the result?
A. If the MAC address of this new client device does not reach the upper limit of the configured total number of MAC addresses allowed in the VPLS forwarding database, then the new MAC address will be stored.
B. The new source MAC addresses will not be entered in the VPLS service forwarding database.
C. New local source MAC addresses will not be entered in the VPLS service forwarding database, but new remote MAC addresses would continue to be entered.
D. New remote source MAC addresses will not be entered in the VPLS services forwarding database, but new local MAC addresses would continue to be entered.
Which of the following best describes the difference between VPWS and VPLS?
A. Unlike VPLS. VPWS appears as a multi-hop network to the customers.
B. Unlike VPLS, VPWS allows CEs that are member of the same service instance to communicate with each other as if they are connected via a bridged LAN.
C. Unlike VPWS, VPLS allows customers to view the network as a routed network.
D. Unlike VPWS, VPLS is a service where customer MAC addresses are learned.
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