Exam 301b topic 1 question 158 discussion

Actual exam question from F5's 301b

Question #: 158
Topic #: 1

-- Exhibit

-- Exhibit --
Refer to the exhibit.
A layer 2 nPath routing configuration has been deployed. A packet capture contains a client connection packet with the following properties:
Source IP: <Virtual Server>
Destination IP: <Client A>
At which two locations could the packet capture have been taken? (Choose two.)

A. the network interface of web server
B. the DMZ interface of the Internet firewall
C. the internal interface of the Internet firewall
D. the external VLAN interface of the LTM device

Show Suggested Answer

Suggested Answer: AC 🗳️

by Degenhardt at Nov. 12, 2020, 9:38 a.m.

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GVKD

6 months, 4 weeks ago

AC - Probably - weird question as it depends on the routing tables of the Firewall and Internal Router which we dont see.

upvoted 1 times

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estampie

3 years, 1 month ago

For L2 nPath routing, will need to configure the same IP address (VIP address) on an interface of web server (usually the loopback interface). Later when the client receives the packet returned directly by the server, it knows that it should talk with VIP again, which ensures the traffic goes to VS on BIGIP again.

upvoted 1 times

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Degenhardt

3 years, 10 months ago

Feels somehow wrong. I'd rather say B and D, because I don't see a chance to get a packet with those addresses on this path. Source IP = Virtual Server makes perfectly sense on the external VLAN of the BIGIP

upvoted 1 times

Degenhardt

3 years, 10 months ago

Okay... nPath seems to be the turning point. Didn't heart that before. https://support.f5.com/csp/article/K11116 Suggested Answers A and C are correct, i guess.

upvoted 5 times

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Renan_Custodio

3 years, 3 months ago

if in the question I have not talked about npath, I would also answer B and D, it's an ugly trick

upvoted 1 times

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Exam 301b topic 1 question 158 discussion

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GVKD

estampie

Degenhardt

Degenhardt

Renan_Custodio

SY0-701