Click the exhibit button below. Based on the configuration shown below, name the forwarding class to be associated with a TCP packet encapsulated inside an Ethernet frame that arrives on SAP 1/1/5…

Question

Exhibit

Options

• AH2
• BNC
• CL2
• DEF
• EH1
• FBE

• B
  11% (7)
• C
  80% (51)
• D
  2% (1)
• E
  6% (4)
• F
  2% (1)

Explanation

Option C (L2) is correct because in Nokia SR OS SAP ingress QoS classification, IP-based criteria (matching TCP port 23) carry higher precedence than DSCP or Dot1p markings - the exhibit's ingress QoS policy contains an explicit entry mapping TCP port 23 traffic to the L2 forwarding class, which overrides what DSCP nc1 or Dot1p 3 would otherwise suggest.

Why the distractors are wrong:

• B (NC): The most tempting distractor - DSCP nc1 maps to Network Control by default, but the specific TCP port 23 IP-criteria match takes precedence over DSCP classification.
• A (H2): Dot1p value 3 is sometimes associated with H2 in default mappings, but again, IP criteria override Dot1p.
• D (EF): EF corresponds to DSCP ef (expedited forwarding); no criteria in this packet's profile points to EF.
• E (H1) / F (BE): Neither matches any criteria present for this specific traffic flow; BE is the fallthrough default when nothing else matches.

Memory tip: Think of Nokia SR OS classification priority as a funnel from specific to general: IP filter/criteria → DSCP → Dot1p → default. Whenever a specific TCP/UDP port or IP address match exists in the policy, it wins the funnel - don't let the DSCP value distract you.

No community discussion yet for this question.