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101 · Question #444

Which of these statements about a stream profile is false?

The correct answer is A. It is applied to an HTTP class profile.. A stream profile in F5 BIG-IP is applied directly to a virtual server, not to an HTTP class profile, making statement A the false claim.

Section 2: F5 Solutions and Technology

Question

Which of these statements about a stream profile is false?

Options

  • AIt is applied to an HTTP class profile.
  • BIt is not recommended for telnet traffic.
  • CIt can replace one data string for another for all traffic going through a virtual server.
  • DIt applies to both inbound and outbound traffic.
  • EIt will not inspect HTTP headers when an HTTP profile is present.

How the community answered

(17 responses)
  • A
    71% (12)
  • B
    18% (3)
  • C
    6% (1)
  • E
    6% (1)

Why each option

A stream profile in F5 BIG-IP is applied directly to a virtual server, not to an HTTP class profile, making statement A the false claim.

AIt is applied to an HTTP class profile.Correct

A stream profile is assigned at the virtual server level to perform string search-and-replace operations on passing traffic - it is not attached to or applied through an HTTP class profile. HTTP class profiles are used to classify traffic for iRules or policy-based routing and are a distinct object type that does not host stream profiles. Confusing virtual server profile assignments with HTTP class profile associations is the key technical error in this statement.

BIt is not recommended for telnet traffic.

This statement is true - stream profiles are not recommended for telnet because telnet transmits data interactively in small character-level segments, which can split target strings across packet boundaries and cause pattern-matching failures.

CIt can replace one data string for another for all traffic going through a virtual server.

This statement is true - replacing one data string with another across all traffic passing through a virtual server is precisely the core purpose of a stream profile.

DIt applies to both inbound and outbound traffic.

This statement is true - stream profiles process traffic in both directions by default, scanning both client-to-server and server-to-client data streams.

EIt will not inspect HTTP headers when an HTTP profile is present.

This statement is true - when an HTTP profile is also applied to the virtual server, the stream profile will skip HTTP headers and restrict its string replacement operations to the message body only.

Concept tested: F5 BIG-IP stream profile assignment and traffic behavior

Source: https://techdocs.f5.com/en-us/bigip-15-1-0/big-ip-local-traffic-management-profiles-reference/stream-profile.html

Topics

#stream profile#LTM profiles#HTTP profile interaction#virtual server traffic

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