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Before routers forward unicast packets, what information is compared with the unicast routing table entries?
Suggested Answer: A
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36 comments · newest first
PE
Pearline
11 months ago
I always get confused with Ethernet vs. IP headers.
TA
Tawna
11 months ago
C makes the most sense, but I wouldn't be surprised if people mix it up!
CL
Clay
11 months ago
Wait, I thought it was the source address?
YO
Yong
11 months ago
Totally agree, C is the right answer.
JA
Jaclyn
12 months ago
It's definitely the destination address of the IP header!
DE
Dean
12 months ago
I thought it was the destination address too, but I keep mixing it up with Ethernet header details from other questions.
EL
Eleonore
12 months ago
I feel like it could also involve the source address, but I can't recall if that's relevant for routing decisions.
VE
Veronica
1 year ago
I remember practicing a question like this, and I think it was definitely about the destination address of the IP header.
SA
Santos
1 year ago
I think we need to look at the destination address of the IP header, but I'm not completely sure if that's the only thing we compare.
RO
Rolland
1 year ago
Ah, this is a classic routing table lookup question. I've seen these before, so I think I know the right approach to solve this.
AL
Alishia
1 year ago
I'm a bit confused by the wording of this question. I'll need to read it over a few times to make sure I understand what they're asking.
EM
Emily
1 year ago
Okay, let me see here. The key is to remember what information the router uses to forward unicast packets. I think I've got this.
DO
Dorian
1 year ago
Hmm, I'm not entirely sure about this one. I'll need to think it through carefully and review my notes on routing table lookups.
JU
Justa
1 year ago
This seems like a pretty straightforward routing question. I'm pretty confident I can figure this one out.
CH
Cheryl
1 year ago
Destination IP address, that's my best guess. I'll mark that and move on to the next question.
SA
Santos
1 year ago
I'm a little confused by the wording of the question. Let me re-read it a few times and see if I can narrow down the options.
DE
Deandrea
1 year ago
The key here is to focus on the information that routers use before forwarding unicast packets. I think the destination IP address is the most relevant.
BA
Bambi
1 year ago
Hmm, I'm a bit unsure on this one. I'll need to think it through carefully and review my notes on unicast routing.
LE
Leatha
1 year ago
This one seems straightforward. I'm pretty confident the answer is the destination address of the IP header.
JO
Johnathon
1 year ago
I guess option A could work if it was a source-based routing scenario, but in a typical unicast forwarding case, it's all about the destination IP, baby!
OL
Olive
1 year ago
Lol, option E? Seriously? The inbound port? That's just silly. Routers care about the IP destination, not the physical port.
TA
Tarra
1 year ago
D) The source address of the Ethernet header.
AH
Ahmad
1 year ago
C) The destination address of the IP header.
LY
Lynda
1 year ago
A) The source address of the IP header.
SA
Salome
2 years ago
I'm going with option C. The destination IP address is definitely the key information the router compares to make its forwarding decision.
JE
Jenifer
1 year ago
Exactly, it helps the router determine the next hop for the packet.
TO
Tommy
1 year ago
Yeah, that's why the destination address of the IP header is compared with the routing table entries.
VA
Vanesa
1 year ago
I agree, the router needs to know where to send the packet based on the destination IP address.
LA
Lashonda
1 year ago
I think option C is correct too. The destination IP address is crucial for routing.
DE
Devorah
2 years ago
I'm not sure, but I think it might also be A) The source address of the IP header, to ensure the packet is coming from a valid source.
PA
Pamella
2 years ago
Hmm, the destination address of the IP header seems like the logical choice here. That's what the router uses to look up the appropriate path in the routing table.
LA
Lauran
1 year ago
E) The inbound port the packet is received in.
AV
Avery
1 year ago
C) The destination address of the IP header.
YE
Yen
2 years ago
A) The source address of the IP header.
CA
Carrol
2 years ago
I agree with Coral, because routers need to know where to forward the packet based on its destination.
CO
Coral
2 years ago
I think the answer is C) The destination address of the IP header.