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In the previous video, we already learn about
web server.

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Next in this video, we are going to learn
about extended access list.

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The case is, we want to block all http access,
so we can not access the server with http,

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but we still able to access server with https.

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And then, all vlan is allowed to access server 1,
only vlan 20 is allowed to access server 2,

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and last, only vlan 30 is allowed to access server 3.

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So this is the case that we are going to use
to learn about extended access list.

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Now let’s learn about the differences between
standard and extended access list.

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In standard access list, the rule is only
based on source address.

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Here we can see that the rule is deny and
then the source address.

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Extended access list is more powerful than
standard access list.

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In the extended access list, the rule will
based on source address, destination address,

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and also protocol.

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So with extended access list, we can block
specific packet.

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Here in the rule 1, we only block http, so
https will still allowed.

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This case only possible if we use extended
access list, we can not use standard access

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list for this case, because in standard access
list, the rule is only based on source address.

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Okay I think enough for this video, I hope
you understand the differences between standard

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and extended access list.

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In the next video, we are going to learn how
to configure extended access list.

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Thank you for watching and see you on the
next video.