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What are ACL matches?
Definition. An Access Control List (ACL) is a packet filter that filters packets based on rules. One or more rules describe the packet matching conditions, such as the source address, destination address, and port number of packets.
What is the number range of an advanced ACL?
By default, no ACLs exist. The value range for a numbered IPv4 advanced ACL is 3000 to 3999. Use the acl number acl-number or acl advanced acl-number command to create a numbered IPv4 advanced ACL.
What is the number range of a basic ACL?
Standard IP access lists are numbered 1 to 99 or 1300 to 1999; extended IP access lists are numbered 100 to 199 or 2000 to 2699. The range of standard IP access lists was initially only 1 to 99, and was subsequently expanded with the range 1300 to 1999 (the intervening numbers were assigned to other protocols).
What ranges of numbers are used when configuring a standard numbered ACL?
What ranges of numbers are used when configuring a standard numbered ACL? (Choose all that apply.) Explanation: Two different numbered ACL ranges can be used for standard ACLs: 1-99 and 1300-1999. Two different numbered ACL ranges can be used for extended numbered ACLs: 100-199 and 2000-2699.
What are the two ranges of numbers would you use to identify an extended ACL?
Extended ACL is created from 100 – 199 & extended range 2000 – 2699.
How many ACLs are there in the world?
Standard ACLs can be defined either by name or by number… When defining them by number, there are two possible number ranges that can be used. 1 through 99 or 1300 through 1999. A curious mind might ask why there’s a gap.
What’s the difference between standard and extended ACLs?
Let’s do a quick review of the both standard as well as extended ACLs and provide some examples. -ACLs are processed top down, lowest sequence number to highest until a match for the traffic is located. This means it’s best practice to put the most restrictive entries at the top of the ACL so they get hit earlier on in the process.
What does the second statement on an ACL mean?
The second statement denies hosts assigned to subnet 172.16.2.0/24 access to any server. That would include any additional hosts added to that subnet and any new servers added. The last ACL statement is required to permit all other traffic not matching previous filtering statements.
Can a standard ACL match an IP address?
Standard ACLs ONLY match the source IP address. Another simple concept here but one that’s worth remembering. Note that I specify ‘IP address’ as part of that definition. There are no other features of an IP packet or frame that a standard ACL can match on.