Standard Access List

A

Standard access lists are used to permit or deny traffic based on the source IP address. They only examine the source IP address and do not take into consideration the destination IP address, protocol type, or port numbers.

In Cisco routers, standard access lists are identified by numbers ranging from 1 to 99 and 1300 to 1999. Out of the answer choices provided, only option A (99) represents the standard access list range.

Option B (150) falls within the extended access list range (100 to 199), which is used to permit or deny traffic based on source and destination IP addresses, protocol type, and port numbers.

Option C (299) is not a valid range for either standard or extended access lists.

Option D (2000) falls within the extended access list range, which as mentioned earlier, is used to permit or deny traffic based on source and destination IP addresses, protocol type, and port numbers.

Therefore, the correct answer to the question is A (99), which represents the standard access list range in Cisco routers.