What are the benefit of using Netflow?

What are the benefit of using Netflow? (Choose three.)

A.
Network, Application & User Monitoring

B.
Network Planning

C.
Security Analysis

D.
Accounting/Billing

Explanation:
NetFlow traditionally enables several key customer applications including:
+ Network Monitoring – NetFlow data enables extensive near real time network monitoring
capabilities. Flow-based analysis techniques may be utilized to visualize traffic patterns
associated with individual routers and switches as well as on a network-wide basis
(providing aggregate traffic or application based views) to provide proactive problem
detection, efficient troubleshooting, and rapid problem resolution.
+ Application Monitoring and Profiling – NetFlow data enables network managers to gain a
detailed, time-based, view of application usage over the network. This information is used to
plan, understand new services, and allocate network and application resources (e.g. Web
server sizing and VoIP deployment) to responsively meet customer demands.
+ User Monitoring and Profiling – NetFlow data enables network engineers to gain detailed
understanding of customer/user utilization of network and application resources. This
information may then be utilized to efficiently plan and allocate access, backbone and
application resources as well as to detect and resolve potential security and policy violations.
+ Network Planning – NetFlow can be used to capture data over a long period of time
producing the opportunity to track and anticipate network growth and plan upgrades to
increase the number of routing devices, ports, or higher- bandwidth interfaces. NetFlow
services data optimizes network planning including peering, backbone upgrade planning,
and routing policy planning. NetFlow helps to minimize the total cost of network operations
while maximizing network performance, capacity, and reliability. NetFlow detects unwanted
WAN traffic, validates bandwidth and Quality of Service (QOS) and allows the analysis of
new network applications. NetFlow will give you valuable information to reduce the cost of
operating your network.
+ Security Analysis – NetFlow identifies and classifies DDOS attacks, viruses and worms in
real-time. Changes in network behavior indicate anomalies that are clearly demonstrated in
NetFlow data. The data is also a valuable forensic tool to understand and replay the history
of security incidents.
+ Accounting/Billing – NetFlow data provides fine-grained metering (e.g. flow data includes
details such as IP addresses, packet and byte counts, timestamps, type-of-service and
application ports, etc.) for highly flexible and detailed resource utilization accounting. Service
providers may utilize the information for billing based on time-of-day, bandwidth usage,
application usage, quality of service, etc. Enterprise customers may utilize the information for
departmental charge-back or cost allocation for resource utilization.