Which of the following are benefits provided with access control lists (ACLs)?

A. ACLs monitor the number of bytes and packets.
B. Virus detection.
C. ACLs dentify interesting traffic for DDR.
D. ACLs provide IP route filtering.
E. ACLs provide high network availability.
F. ACLs classify and organize network traffic.


Answer: C, D

Explanation:
IP access control lists allow a router to discard some packets based on criteria defined by
the network engineer. The goal of these filters is to prevent unwanted traffic in the
network - whether to prevent hackers from penetrating the network or just to prevent
employees from using systems they should not be using.
IP access lists can also be used to filter routing updates, to match packets for
prioritization, to match packets for prioritization, to match packets for VPN tunneling,
and to match packets for implementing quality of service features. It is also used to
specify the interesting traffic, which is used to trigger ISDN and Dial on Demand Routing
(DDR) calls.

Incorrect Answers:
A, F. ACLs do not provide for management and traffic analysis functions such as the
monitoring and organization of network packets.
routinely provide for virus detection and removal.
E. ACLs alone do not provide for any additional level of network availability.