Which statement best describes the Turbo ACL feature? (Choose all that apply.)
A.
The Turbo ACL feature processes ACLs into lookup tables for greater efficiency.
B.
The Turbo ACL feature leads to increased latency, because the time it takes to match the packet is variable.
C.
The Turbo ACL feature leads to reduced latency, because the time it takes to match the packet is fixed and consistent.
D.
Turbo ACLs increase the CPU load by matching the packet to a predetermined list.
Explanation:
The Cisco 7200 series, Cisco 7500 series, and Cisco 12000 series routers support the
Turbo ACL feature, which processes ACLs into lookup tables for greater efficiency.
Turbo ACLs use the packet header to access these tables in a small, fixed number of
lookups, independent of the existing number of ACL entries. The Turbo ACL feature has
a number of benefits:
* For ACLs with more than three entries, the CPU load is lower when matching the
packet to the predetermined packet matching. The Turbo ACL feature fixes the CPU load,
regardless of the size of the ACL, allowing the use of larger ACLs without adding CPU
overhead.
* The Turbo ACL feature leads to much reduced latency because the time it takes to
match the packet is fixed.More importantly, the time taken to match is consistent,
allowing for better network stability and more accurate transit times.