Question

Which of the following header fields cannot be used to define a pattern in OpenFlow?

a) Destination IP address
b) Destination domain name
c) Destination port number
d) Destination
e) MAC address

Answer 1

The header field that cannot be used to define a pattern in OpenFlow is the Destination domain name, as OpenFlow works with IP addresses, MAC addresses, and port numbers but not domain names.

Step-by-step explanation:

Among the header fields listed for defining a pattern in OpenFlow, the option b) Destination domain name cannot be used. OpenFlow is a protocol for network management and packet handling that operates at the data link layer and network layer of the OSI model, which deals with IP addresses, MAC addresses, and ports, but not domain names, as domain names are resolved at a higher level in the protocol stack (typically at the application layer).

OpenFlow is a versatile networking protocol that allows for programmable network environments, but it does not handle domain names directly within its flow table configuration. Instead, OpenFlow matches fields like Destination IP address, Destination port number, and Destination MAC address which are used by switches and routers to make forwarding decisions.The header field Destination domain name cannot be used to define a pattern in OpenFlow. OpenFlow is a protocol used in software-defined networking (SDN) to control and manage network devices. It enables network administrators to program and control the flow of traffic through a network by defining rules based on specific attributes in an incoming packet header.