$1.(10$ pts$)$ Recall the discussion of multiprotocol label switching $($MPLS$)$ from the lecture slides. Highlight the first packet and examine the Packet Details pane. In what layer of the OSI model does the MPLS data reside? Explain your answer.

$2.(10$ pts$)$ Assume that the first packet is being forwarded by an entry point router of an MPLS$-$based carrier network. Which piece of information, displayed in the Packet Details pane, is directly responsible for determining how the packet will be routed through the carrier network?

$3.(10$ pts$)$ A time$-$to$-$live $($TTL$)$ value is set as part of various routing protocols to ensure that a misrouted packet does not bounce around the network indefinitely. As a packet is processed at each router $($i$.$e$.$ at each $$hop$),$ the TTL value is reduced by one. If$/$when the TTL value reaches zero, the packet is dropped. How many $$hops$$ between routers could the first packet make before it would be dropped?