CCNA Routing and Switching (legacy) — Question 115

In which byte of an IP packet can traffic be marked?

Answer options

• A. the QoS byte
• B. the CoS byte
• C. the ToS byte
• D. the DSCP byte

Correct answer: C

Explanation

The correct answer is C, the ToS byte, which stands for Type of Service and is used to mark packets for traffic management. Options A (QoS byte) and B (CoS byte) refer to different concepts related to Quality of Service, while D (DSCP byte) pertains to Differentiated Services Code Point, which is a more advanced marking method but is not the same as the original ToS byte.