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Which of the following fields in packets belonging to a Layer 3 service can be pre-marked on SAP-ingress?
Suggested Answer: D
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44 comments · newest first
EL
Elfriede
11 months ago
Wait, can you really pre-mark all those fields?
FL
Fletcher
11 months ago
I agree, DSCP/PREC is the way to go!
AL
Albina
11 months ago
Not sure about DEI, seems less common.
TA
Talia
11 months ago
I think Dot1p is also an option.
DE
Delmy
12 months ago
Definitely DSCP/PREC can be pre-marked.
RU
Rueben
12 months ago
I thought EXP was mentioned in our notes, but I can't remember if it was specifically for SAP-ingress or another context.
LI
Lilli
1 year ago
I’m leaning towards Dot1p being pre-marked, but I’m a bit confused about how it relates to the other options.
AL
Alease
1 year ago
I remember practicing a similar question where we had to identify which fields could be marked on ingress. I feel like DEI might be one of them, but I can't recall clearly.
AN
Antione
1 year ago
I think we discussed DSCP/PREC in class as something that can be pre-marked, but I'm not entirely sure about the others.
GI
Gianna
1 year ago
I think the answer is D. DSCP/PREC. That's the field in Layer 3 packets that can be pre-marked on SAP-ingress, if I remember correctly. I'm fairly confident in this answer, but I'll review the material just to be sure.
LY
Lynna
1 year ago
I'm a bit confused by this question. I know we're dealing with Layer 3 services, but I'm not sure which field can be pre-marked on SAP-ingress. I'll have to carefully read through the options and try to eliminate the ones that don't seem right.
VI
Victor
1 year ago
Okay, let's think this through step-by-step. We're looking for a field in Layer 3 packets that can be pre-marked on SAP-ingress. That narrows it down to DSCP/PREC or EXP. I'm leaning towards DSCP/PREC, but I'll double-check my notes to confirm.
TA
Tamala
1 year ago
Hmm, I'm not entirely sure about this one. I think it might be A. Dot1p, but I'm not 100% certain. I'll have to review the material again to be sure.
MA
Marsha
1 year ago
I'm pretty confident that the answer is D. DSCP/PREC is the field in Layer 3 packets that can be pre-marked on SAP-ingress.
KA
Karma
2 years ago
I'm going to have to go with D. The others just seem like they'd be more for Layer 2 or something. Unless this is a trick question and the answer is actually a duck.
BE
Bette
2 years ago
Hmm, I'm tempted to go with C. EXP, since that's the MPLS field for QoS. But I guess that's not really a Layer 3 thing.
FR
Freeman
2 years ago
Yeah, I agree. DSCP/PREC is the correct choice for pre-marking QoS in Layer 3 packets.
SI
Simona
2 years ago
I think D. DSCP/PREC is the field in Layer 3 packets that can be pre-marked for QoS.
TY
Tyisha
2 years ago
D) DSCP/PREC
RE
Rebbeca
2 years ago
C) EXP
NG
Nguyet
2 years ago
B) DEI
NA
Naomi
2 years ago
A) Dot1p
PA
Paris
2 years ago
D for sure. The other choices are more for lower layer protocols like Ethernet and MPLS.
RO
Rosio
2 years ago
Yes, DSCP/PREC is the correct choice for Layer 3 service packets.
WH
Whitley
2 years ago
I agree, DSCP/PREC is the field in Layer 3 packets that can be pre-marked on SAP-ingress.
CO
Corinne
2 years ago
D for sure. The other choices are more for lower layer protocols like Ethernet and MPLS.
LU
Luisa
2 years ago
I believe C) EXP can also be pre-marked in Layer 3 packets.
RO
Rosamond
2 years ago
I'm not sure, but I think A) Dot1p could also be pre-marked.
TA
Taryn
2 years ago
Yeah, D makes the most sense to me too. Can't really see any of the other options being relevant at Layer 3.
GE
German
2 years ago
D) DSCP/PREC
JE
Jettie
2 years ago
Yeah, D makes the most sense to me too. Can't really see any of the other options being relevant at Layer 3.
BE
Beckie
2 years ago
C) EXP
JE
Jenise
2 years ago
B) DEI
LO
Louis
2 years ago
A) Dot1p
VE
Veronique
2 years ago
I agree with Christoper, DSCP/PREC makes sense for pre-marking.
CH
Christoper
2 years ago
I think the answer is D) DSCP/PREC.
AM
Amalia
2 years ago
I'm pretty sure it's D. DSCP/PREC, since that's the Layer 3 field for QoS marking.
SA
Salome
2 years ago
Yes, DSCP/PREC is the Layer 3 field for QoS marking.
RO
Rodrigo
2 years ago
Agreed, DSCP/PREC is the correct field for QoS marking.
HO
Hoa
2 years ago
I think it's D. DSCP/PREC too.
AL
Alpha
2 years ago
D) DSCP/PREC
CH
Cherilyn
2 years ago
C) EXP
NE
Nettie
2 years ago
B) DEI
AD
Adell
2 years ago
A) Dot1p