CCNA Routing and Switching (legacy) — Question 44

What 8-bit field exists in IP packet for QoS?

Answer options

• A. Tos Field
• B. DSCP
• C. IP Precedence
• D. Cos

Correct answer: A

Explanation

The Tos Field is the correct answer as it is the original 8-bit field used in the IP header for specifying QoS parameters. DSCP and IP Precedence are advancements and methods used for QoS but are not the original 8-bit field. Cos refers to Class of Service, which is used in different contexts and is not part of the IP packet structure.