Exam HPE6-A73 topic 1 question 38 discussion

The question is " Which statement correctly describes what is allowed for traffic entering interface 1/1/3?" I think that what is allowed to enter the interface 1/1/3 is everything from: ANY TO -> 10.X.11.X(this is allowed and counted) or 10.X.12.X(this allowed and loged), thats why i think the answer is B Everything with other "destination" should be denny.

why no one is talking about the incorrect 255.0.255.0 subnet in the ACL

As per ACL definition: Matching seq 20 "permit ip any 10.0.12.0/255.0.255.0 log" So trafic from any source ip address is permitted to 10.x.12.x

B is correct

B is correct

B is correct

B is correct

No wildcard mask with Aruba CX. B answer

B is correct

People seem to be confused by inverted mask/wildcard masks. They would be correct for Cisco switches, but AOS-CX does NOT use wildcard masks; "AOX-CX switches do not support wildcard masks - only prefixes or subnet masks - when created ACEs." Cisco: 255.0.255.0 = xx.123.xx.123 AOS-CX: 255.0.255.0 = 123.xx.123.xx My answer is B.

I think the answer is D. Here is the simplified access list with X=any (0-255) permit any -> X.0.X.0 count permit any -> X.0.X.0 log They are practically the same ACL with only different the top does count and bottom does log. A. IP traffic from 10.1.11.0/24 is allowed to access 10.1.110.0/24 We dont care with source (10.1.11.0/24). The source can be any. But the destination is 10.1.110.0/24 and it does not match. The second octet must be 0. B. IP traffic from 10.0.11.0/24 is allowed to access 10.1.12.0/24 Same with A. 10.1.12.0 does not match because second octet is 1 C. Traffic from 10.0.12.0/24 will generate a log record when accessing 10.0.11.0/24 This actually match both ACEs but since ACL matches from top to bottom, so it will match the top ACE (count). D. IP traffic from 10.1.12.0/24 is allowed to access 172.0.1.0/23 this would match the ACL. We dont care about source and destination 172.0.1.0 (match X.0.X.0) Samw

My opinion: B Only traffic destined TO the listed subs is allowed This excluded A and D Only traffic TO 10.1.12.0 is logged This excludes C This leaves B .11.0 is part of ANY so it is allowed to access .12.0 This traffic will be logged but that isn't part of the answer.

I think it's C. ACL entries work with wildcard mask. The wildcard mask is 255.0.255.0. This is a wildcard mask and not a subnet mask also because it is not a valid subnet mask. In a wildcard mask made in this way you have to match bits where wildcard is 0. So, it matches packets where the DESTINATION IP ADDRESS is X.0.X.0. In a /24 network, you will never have a destination IP where the last octet is 0. So i think this ACL is not valid, by the way, the only answer that matches the ACL entries is the C BUT it matches the first entry, so it will never generate a log, but a counter increment. This is a bad question with no matching answers. The "best matching" answer is C even if it is wrong.

B sound correct but check the ip addresses properly 10.0.11.0/24 and 10.0.12.0/24 where is 10.1.12.0/24 coming from? C is correct then

I think answer is B.

but 10.1.12.0 is not matching the wild card mask. i see answer C more accurate, because count will generate syslog message right ?

It's possible that B is correct but look at the log and count entries in the commands. I think C is correct. A log entry will be generated for this subnet.