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101 · Question #270

APM provides access control lists at which two OSI layers? (Choose two.)

The correct answer is B. Layer 4 C. Layer 7. F5 APM access control lists operate at both Layer 4 (transport) and Layer 7 (application) of the OSI model, allowing port-based and URL/application-based filtering.

Section 2: F5 Solutions and Technology

Question

APM provides access control lists at which two OSI layers? (Choose two.)

Options

  • ALayer 5
  • BLayer 4
  • CLayer 7
  • DLayer 6
  • ELayer 2

How the community answered

(26 responses)
  • A
    4% (1)
  • B
    92% (24)
  • D
    4% (1)

Why each option

F5 APM access control lists operate at both Layer 4 (transport) and Layer 7 (application) of the OSI model, allowing port-based and URL/application-based filtering.

ALayer 5

Layer 5 is the session layer; APM does not implement ACLs at this OSI layer.

BLayer 4Correct

Layer 4 ACLs in APM filter traffic based on TCP/UDP port numbers and IP addresses, controlling access at the transport layer.

CLayer 7Correct

Layer 7 ACLs in APM filter based on application-layer attributes such as HTTP URLs and methods, enabling application-aware access control.

DLayer 6

Layer 6 is the presentation layer; APM ACLs do not operate at this layer.

ELayer 2

Layer 2 is the data link layer; APM ACL enforcement applies to IP-routed traffic, not MAC-level frame filtering.

Concept tested: F5 APM access control list OSI layer support

Source: https://techdocs.f5.com/en-us/bigip-17-1-0/big-ip-access-policy-manager-network-access.html

Topics

#APM ACL#OSI layers#Layer 4 access control#Layer 7 access control

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