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Your customer requests that you provide a transparent Layer 2 service between two of their remote locations. This service must allow the customer to pass tagged traffic from multiple VLANs. You decide to use Q-in-Q tunneling on the two provider edge MX Series routers that connect to the customer's CE devices. Which two statements are true? (Choose two.)
Correct Answer: A,C
Explanation/Reference: Q-in-Q tunneling adds a service VLAN tag before the customer's 802.1Q VLAN tags. The Juniper Networks Junos operating system implementation of Q-in-Q tunneling supports the IEEE 802.1ad standard. In Q-in-Q tunneling, as a packet travels from a customer VLAN (C-VLAN) to a service provider's or data center VLAN (S-VLAN), another 802.1Q tag for the appropriate S-VLAN is added before the C-VLAN tag. The C-VLAN tag remains and is transmitted through the network. As the packet leaves the S-VLAN in the downstream direction, the S-VLAN 802.1Q tag is removed. With the push option, a packet retains its tag and an additional VLAN tag is added. With the swap option, the incoming tag is replaced with an S-VLAN tag. (This is VLAN translation.) References: https://www.juniper.net/documentation/en_US/junos12.3/topics/concept/qinq-tunneling-qfx- series.html