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F5 Networks 303 Exam - Topic 1 Question 19 Discussion

What does the following iRule do?when CLIENT_ACCEPTED {if { [matchclass [IP::client_addr] equals WebClient1-Whitelist1] }{#log local0. "Valid client IP: [IP::client_addr] - forwarding traffic"#Pool WebClient1} else {log local0. "Invalid client IP: [IP::client_addr] - discarding"discard}}
B) The iRule compares a client IP to a list. If the client IP is NOT on the list, discard and log the discard.
A) The iRule compares a client IP to a list. If the client IP is on the list, discard and log the discard.
C) The iRule compares a client IP to a list. If the client IP is on the list, the client is sent to Pool WebClient1. Otherwise, discard and log the discard.
D) The iRule compares a client IP to a list. If the client IP is NOT on the list, the client is sent to Pool WebClient1. Otherwise, discard and log the discard.

F5 Networks 303 Exam - Topic 1 Question 19 Discussion

Actual exam question for F5 Networks's 303 exam
Question #: 19
Topic #: 1
[All 303 Questions]

What does the following iRule do?

when CLIENT_ACCEPTED {

if { [matchclass [IP::client_addr] equals WebClient1-Whitelist1] }{

#log local0. "Valid client IP: [IP::client_addr] - forwarding traffic"

#Pool WebClient1

} else {

log local0. "Invalid client IP: [IP::client_addr] - discarding"

discard

}

}

Show Suggested Answer Hide Answer
Suggested Answer: B

by Jess at Jul 30, 2025, 09:20 AM

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Linn
5 months ago
Seems straightforward, but what if the list is empty?
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Farrah
5 months ago
Wait, I thought it discarded valid IPs?
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Hoa
6 months ago
Totally agree, it forwards valid clients to the pool!
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Margo
6 months ago
Nope, it discards invalid IPs, not valid ones.
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Anissa
6 months ago
The iRule checks if the client IP is in a whitelist.
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Alonso
7 months ago
I keep mixing up the logic in these questions. I thought it was about discarding invalid IPs, but I can't remember if it forwards valid ones or not.
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Jerilyn
7 months ago
From what I practiced, I believe it sends valid clients to a specific pool and discards the rest. That sounds like option C, right?
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Breana
7 months ago
I'm not entirely sure, but I feel like it discards traffic if the IP isn't on the list. The logging part seems important too.
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Albina
7 months ago
I think the iRule checks if the client IP is in a whitelist and forwards traffic if it is. I remember similar questions about IP filtering.
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Wilbert
8 months ago
This is a good example of how important it is to read the question and the code carefully. I'd recommend taking a minute to really understand what the iRule is doing before jumping to an answer. Rushing through these types of questions can lead to silly mistakes.
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Jesus
8 months ago
Okay, I think I've got it. The iRule is checking if the client IP is in the "WebClient1-Whitelist1" class. If it is, it's forwarding the traffic to the "WebClient1" pool. If it's not, it's discarding the connection and logging it. Option C seems to be the correct answer.
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Glenn
8 months ago
Hmm, I'm a little confused about the logic here. Is it supposed to be discarding the connection if the IP is on the list, or if it's not on the list? The wording in the options is a bit ambiguous.
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Viva
8 months ago
This iRule looks pretty straightforward. It's checking the client IP address against a whitelist, and if it's on the list, it's forwarding the traffic to a pool. Otherwise, it's discarding the connection and logging it.
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Cecily
9 months ago
I'm not sure, but I think the iRule discards the client if their IP is not on the list.
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Izetta
9 months ago
This iRule is like a bouncer at a club, checking IDs and only letting in the cool kids. I hope the correct answer isn't 'send them to the back of the line' - that would be a real bummer.
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Alecia
5 months ago
Yeah, no one wants to be sent to the back of the line!
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Ciara
5 months ago
Definitely! Only the approved IPs get in.
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Eugene
6 months ago
Sounds like it's all about checking the guest list!
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Clay
6 months ago
So, it's option C then? That makes sense!
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Sharen
10 months ago
This iRule is so complicated, it's making my head spin. Is this what they call 'advanced networking'? I'll just go with the answer that sounds the most technical - option C.
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Scarlet
10 months ago
I agree with Cheryl. It seems like option C is the correct answer.
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Lauryn
10 months ago
Wait, what? This iRule is supposed to log a message if the client IP is invalid, but then it also discards the connection. Seems a bit overkill, no? I'd go with option B.
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Cheryl
10 months ago
I think the iRule sends the client to Pool WebClient1 if their IP is on the list.
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Francoise
10 months ago
Hmm, I think the question is trying to trick us. It says the iRule 'discards' the connection, but option C says it sends the client to Pool WebClient1. I'm going with option C.
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Novella
10 months ago
This iRule checks the client IP against a whitelist. If the IP is on the list, it forwards the traffic to Pool WebClient1. Otherwise, it discards the connection and logs the event. Seems pretty straightforward to me.
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Son
9 months ago
This iRule checks the client IP against a whitelist. If the IP is on the list, it forwards the traffic to Pool WebClient1. Otherwise, it discards the connection and logs the event.
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Lonna
9 months ago
C) The iRule compares a client IP to a list. If the client IP is on the list, the client is sent to Pool WebClient1. Otherwise, discard and log the discard.
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Zita
10 months ago
A) The iRule compares a client IP to a list. If the client IP is on the list, discard and log the discard.
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Edward
10 months ago
User3: This iRule checks the client IP against a whitelist. If the IP is on the list, it forwards the traffic to Pool WebClient1. Otherwise, it discards the connection and logs the event. Seems pretty straightforward to me.
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Christiane
10 months ago
User2: C) The iRule compares a client IP to a list. If the client IP is on the list, the client is sent to Pool WebClient1. Otherwise, discard and log the discard.
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Alyce
10 months ago
User1: So, what does this iRule do?
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