Ip access-list extended

1. What is IP access-list extended?
2. What is difference between standard and extended ACL?
3. What is extended IP address?
4. What are the ranges for extended ACLs?

What is IP access-list extended?

Extended access-list is generally applied close to the source but not always. In the Extended access list, packet filtering takes place on the basis of source IP address, destination IP address, port numbers. In an extended access list, particular services will be permitted or denied.

What is difference between standard and extended ACL?

Standard ACLs: These ACLs permit or deny packets based only on the source IPv4 address. Extended ACLs: These ACLs permit or deny packets based on the source IPv4 address and destination IPv4 address, protocol type, source and destination TCP or UDP ports, and more.

What is extended IP address?

Extended IP access-lists have the ability to look at source and destination IP addresses, layer 4 protocols, layer 4 specific information such as source and destination ports, and various protocol flags at layer 3 and layer 4.

What are the ranges for extended ACLs?

acl-num Access list to which all commands entered from access list configuration mode apply, using a numeric identifier. For extended access lists, the valid range is 100 to 199.