Compare and Contrast Differentiated Services Code Points (DSCP) and 802.1p (CoS) POWERSWITCH-CAMPUS-DEPLOY Practice Questions (Page 3)

Questions 11–13

1. 11foundation · easy

   A switch port is connected to an untrusted end-user device. What is the typical default QoS behavior for DSCP markings on this port?

   • AThe switch ignores DSCP and only uses 802.1p priority.
   • BThe switch drops all packets with DSCP markings.
   • CThe switch remarks the DSCP value to a default or configured value.
   • DThe switch trusts the DSCP markings and applies the corresponding priority.
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   Which of the following correctly contrasts DSCP and 802.1p?

   • ADSCP uses 3 bits and provides 8 classes; 802.1p uses 6 bits and provides 64 classes.
   • BDSCP is a Layer 2 marking in the Ethernet header; 802.1p is a Layer 3 marking in the IP header.
   • CDSCP is used only in MPLS networks; 802.1p is used only in Wi-Fi networks.
   • DDSCP is marked in the IP header and supports 64 code points; 802.1p is marked in the Ethernet frame and supports 8 priorities.
   Reveal Solution Discussion Select an answer first
3. 13foundation · easy

   Which statement best describes the role of DSCP in IP packet marking for Quality of Service?

   • AIt uses a 6-bit field in the IP header to classify packets into up to 64 different classes.
   • BIt replaces the IP address in the packet to identify the source of the traffic.
   • CIt is a Layer 4 protocol that negotiates QoS parameters between hosts.
   • DIt marks the Ethernet frame header to prioritize traffic at Layer 2.
   Reveal Solution Discussion Select an answer first