101 · Question #242
How is traffic flow through transparent virtual servers different from typical virtual servers?
The correct answer is A. any text string within a cookie C. an IP address. On F5 BIG-IP, data groups support text strings (such as values extracted from cookies) and IP addresses as valid match types for use in iRule class matching.
Question
How is traffic flow through transparent virtual servers different from typical virtual servers?
Options
- Aany text string within a cookie
- Bany bytes within the initial client request packet
- Can IP address
- Dthe value in the tcp acknowledgement field
How the community answered
(54 responses)- A94% (51)
- B4% (2)
- D2% (1)
Why each option
On F5 BIG-IP, data groups support text strings (such as values extracted from cookies) and IP addresses as valid match types for use in iRule class matching.
Text strings derived from cookie values are valid string-type data group entries and can be matched in iRules using 'class match' commands against string data groups, making them a supported key type.
Arbitrary raw bytes from the initial client request packet do not constitute a supported data group value type - data groups require structured string, address, or integer values rather than untyped byte sequences.
IP addresses are a natively supported data group type in F5 BIG-IP, enabling iRules to perform efficient prefix-based or exact-match lookups against host or network address entries.
The TCP acknowledgement field value is a transport-layer sequence number and is not a recognized or supported type for data group matching in F5 BIG-IP iRules.
Concept tested: F5 BIG-IP data group supported value types for iRules
Source: https://techdocs.f5.com/en-us/bigip-16-1-0/big-ip-local-traffic-management-irules-concepts/irules-data-groups.html
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