A network technician is configuring network addresses and port numbers for a router ACL to block a peer-to-peer application. Which of the following is the HIGHEST layer of the OSI model at which this router ACL operates?
A. Transport
B. Network
C. Session
D. Application
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Most of us have finished studying network+ and have learned about phishing. This comment is highly suspicious. What do you guys think?
hint: network address (layer 3) and port numbers (layer 4)
so the answer is Layer 4.
https://kb.netgear.com/21708/What-are-Access-Control-Lists-ACLs-and-how-do-they-work-with-my-managed-switch
MAC ACLs are used for Layer 2. IP ACLs are used for Layer 3. Each ACL contains a set of rules that apply to inbound traffic. Each rule specifies whether the contents of a given field should be used to permit or deny access to the network, and may apply to one or more of the fields within a packet.
(peer-to-peer is a Torrent app which keeps changing ports) This should be UTM which operates at layer 7
B