Question

Which IPv4 header field is responsible for defining the priority of the packet?

Option 1: Time-to-Live (TTL)
Option 2: Protocol
Option 3: Differentiated Services (DSCP)
Option 4: Source IP Address

Answer 1

The Differentiated Services (DSCP) field in the IPv4 header defines the priority of the packet, ensuring different levels of Quality of Service (QoS) in network traffic.

Step-by-step explanation:

The header field in an IPv4 packet that is responsible for defining the priority of the packet is the Differentiated Services (DSCP). This field, also known as the DiffServ field, enables packets to be treated differently based on the priority and type of service they are associated with, which is crucial for quality of service (QoS) in networks. Time-to-Live (TTL) is used to limit the packet's lifespan to prevent it from looping indefinitely. The Protocol field indicates the type of payload embedded in the packet, such as TCP, UDP, etc. The Source IP Address identifies the sender of the packet.