Which of the following fields are included in an MPLS header? (Choose three.)
Which of the following fields are included in an MPLS header? (Choose three.)
The MPLS (Multiprotocol Label Switching) header includes several fields designed for efficient packet forwarding. The 'Label' field identifies the Forwarding Equivalence Class (FEC) and is crucial for determining the next hop in a label-switched path. The 'EXP' field consists of experimental bits used for Quality of Service (QoS). The 'TTL' field (Time To Live) is used to limit the lifespan of a packet in the network by decrementing its value at each hop, preventing routing loops. Therefore, these three fields (Label, EXP, and TTL) are included in an MPLS header.
The answeri is ACD Mpls header contain label, exp, bos, ttl
Here is a table representation of an MPLS header: Field Size (bits) Description Label 20 Used to identify the Forwarding Equivalence Class (FEC) for the packet. EXP 3 Experimental bits used for Quality of Service (QoS). S 1 Bottom of Stack bit. Set to 1 for the last label in the label stack. TTL 8 Time to Live. Decremented at each hop and used to prevent routing loops.
Answer is ACD
Check "MPLS Implementation" section. https://support.huawei.com/enterprise/en/doc/EDOC1100118961
The MPLS (Multiprotocol Label Switching) header includes the following fields: A. Label C. EXP (Experimental) D. TTL (Time To Live) Explanation: A. Label: The MPLS label is a fixed-size field that is used to identify the forwarding equivalence class (FEC) and to determine the next hop in the label-switched path (LSP). C. EXP (Experimental): EXP bits are used for experimental purposes, allowing the definition of Class of Service (CoS) values for QoS (Quality of Service). D. TTL (Time To Live): The TTL field is used to limit the time that a packet can circulate in the network. It is decremented at each hop, and if it reaches zero, the packet is discarded.