Yes I am still struggling with this!
RouterA\S0<
>RouterB\S0
......|.......................................|
......|.......................................|
ServerA.............................ServerB
192.168.1.18\28...............192.168.2.18\28
** Ignore the dots** That is my miserable attempt at spacing.
In order to control access, the following access list is created:
access-list 101 permit tcp 192.168.1.16 0.0.0.15 192.168.2 16
0.0.0.15 eq 23
What would happen if you applied the following ACL to any one of the
routers in the above exhibit? On what interface and what direction should you apply it? Once applied, what will this access list accomplish? (Select all valid answer
choices)
A. Telnet traffic from 192.168.1.16 0.0.0.15 to 168.2.16 0.0.0.15 is allowed.
B. SMTP traffic from 192.168.1.16 0.0.0.15 to 168.2.16 0.0.0.15 is allowed.
C. The ACL is configured to allow traffic from one specific host to another.
D. The ACL should be applied inbound to the e0 interface of RouterA.
E. The ACL should be applied outbound to the e0 interface of RouterA.
Answer: A, D
I chose A and E
The book says E is wrong because:
"This would not be useful if applied to the outbound, as no traffic would match then. Note that if this answer had stated that the access list be placed on the outbound serial (WAN) interface, then this would have been an acceptable choice."
How would no traffic match? Is this because a routing decision has not been made so outbound does not yet apply?
