Which Of The Following Statements Is True Regarding Access Control Lists (Acls)?

Which of the following statements is true regarding the Access control list (ACL)?

1. Access Control Lists (ACL) extension provides access to retain traffic from the specified IP address or the destination IP address and port.

1.  The extension of the access control lists(ACLs) gives the access to keep the frames from only specified source IP addresses.
2. The standard access control lists(ACLs) give the access to keep the frames from only specified source IP addresses.
3. ACLs filter the frames or the network traffic by managing whether routed frames moved or keep them at the router interface.
4. Standard IP Access Control List can be used to permit or deny traffic from a specific source IP address or for a specific destination IP address, and port.

Answer: The correct option for the ACL is options 1,3 and 4. Let’s see at the explanation of the given answer.

 If the ACE (access control entry) authorizes the frames, then they would not be prevented by any specific entry later in the access control lists(ACLs). And if the packets are permitted by the ACE they would not be authorized by any more specific in the ACLs. if the packets are not matched with any other entry in the access control list then they are prevented.

The access control is processed in a sequential, starting from the first toward the end. as the ACL process work from top to last, the perfect sequence is important to ensure the proper filtering. The higher specified entry is resent at the top in the ACL and processed before the low specified entry. This will impose to ensure that the higher specific entry in an ACL list does not neglect the statement impact present at the low level in the ACL.

ACL contains multiple entries that cause the conflict. Such as you have the entry which authorizes the network traffic from the specified source or the designated IP address and other entries which prevent the entries from the exact source or designated IP address.

During the modification of the ACL be very careful. By default, the new entries are located at the end of the ACL and are not able to cause any kind of conflicts among the entries. As new statements added to a current ACL are appended to the cease of the prevailing ACL, it is probably essential to recreate the ACL if you want to make considerable modifications to an ACL or upload an assertion that has to seem at or close to the pinnacle of the access control list.