QoS services are protocols that allow routers to make decisions about which IP datagram may be more important than others. Which IP header field would QoS details be found?

The IP header field where the QoS details would be found is the service type field.

It should be noted that the type of service field is simply the second byte of the IPv4 header. It's simply an eight-bit length binary number field that provides an indication of the quality of service desired.

QoS services are protocols that are important for allowing routers to make decisions about the IP datagram that may be more important than others.

In conclusion, the correct option is service type field.

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Type of service field

Explanation:

Data messages are transmitted in packets known as IP datagram. The IP datagram consist of header (which carries the header and control field) and payload (it carries the information).

The type of service field is an eight bit field carries information about the quality of service (QoS) features. The QoS allow routers to prioritize IP datagrams like which datagram is important than other datagram.