What are three values that must be the same within a sequence of packets for NetFlow to consider them a network flow? (Choose three.)

The correct answer is A. source IP address D. ingress interface E. destination IP address. NetFlow defines a traffic flow using a 7-tuple key. Packets belong to the same flow only if all seven fields match: source IP address, destination IP address, source port, destination port, Layer 3 protocol, Type of Service (ToS), and ingress (input) interface. Source MAC address

Network Device Management

Question

What are three values that must be the same within a sequence of packets for NetFlow to consider them a network flow? (Choose three.)

Exhibit

Options

Asource IP address
Bsource MAC address
Cegress interface
Dingress interface
Edestination IP address
FIP next-hop

How the community answered

(65 responses)

A
91% (59)
B
5% (3)
C
3% (2)
F
2% (1)

Explanation

NetFlow defines a traffic flow using a 7-tuple key. Packets belong to the same flow only if all seven fields match: source IP address, destination IP address, source port, destination port, Layer 3 protocol, Type of Service (ToS), and ingress (input) interface. Source MAC address is a Layer 2 attribute and is not part of the NetFlow key. Egress interface and IP next-hop are not part of the 7-tuple. From the choices, source IP address (A), ingress interface (D), and destination IP address (E) are all components of the NetFlow key.

Topics

#NetFlow#network flow definition#flow key fields#traffic monitoring

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