Posted by: Pdfprep
Post Date: November 11, 2020
Which of the following statements regarding MPLS label encapsulation format are true? (Multiple Choice)
A . The total length of an MPLS label is 4 bytes (32 bits).
B . The TTL field in an MPLS label has the same meaning as that in an IP packet, and can prevent loops.
C . The S field in an MPLS label has 1 bit and is used to identify whether the label is the bottom-of-stack label. If the value is 1, the label is a penultimate-layer label.
D . For Ethernet and PPP packets, a label stack is located between the Layer 2 packet header and data. If a VLAN tag is available, the label stack is placed before the VLAN tag.
Answer: AB
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