MPLS Packet Header JN0-364 Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What does the S bit value of 1 indicate in an MPLS label stack?

   • AThe label is invalid and should be discarded.
   • BThis is the first label in the stack.
   • CThis is the last label in the stack.
   • DThe packet should be forwarded using the IP header.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   What is the range of values that can be represented by the 20-bit label field in the MPLS shim header?

   • A0 to 65,535
   • B0 to 16,777,215
   • C0 to 1,048,575
   • D1 to 1,048,576
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   In an MPLS label stack, how is the top label identified?

   • AIt is the label closest to the IP payload.
   • BIt is the first label encountered when reading the packet from the Layer 2 header.
   • CIt is the label with the highest numerical value.
   • DIt is the label with the S bit set to 1.
   Reveal Solution Discussion Select an answer first
5. 14foundation · easy

   What is the primary purpose of the 8-bit TTL field in the MPLS shim header?

   • ATo prevent packets from looping indefinitely in the network
   • BTo prioritize time-sensitive traffic
   • CTo identify the length of the label stack
   • DTo encrypt the MPLS payload
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   When a router receives an MPLS packet with the S bit set to 0, what does it know?

   • AThere is at least one more MPLS label after the current one.
   • BThe router should immediately pop the label and forward the IP packet.
   • CThe payload is an IPv6 packet.
   • DThe packet is malformed and should be dropped.
   Reveal Solution Discussion Select an answer first