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 Definitions and Benefits Reference:
http://www.cisco.com/en/US/products/sw/netmgtsw/ps1964/products_implementation_design_gu
id e09186a00800d6a11.html#wp1030045

NetFlow traditionally enables several key customer applications including:
Network Monitoring—NetFlow data enables extensive near real time network monitoring
capabilities. Flowbased 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,
timebased, 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.
NetFlow Data Warehousing and Data Mining—NetFlow data (or derived information) can be
warehoused for later retrieval and analysis in support of proactive marketing and customerservice
programs (e.g. figure out which applications and services are being utilized by internal and external
users and target them for improved service, advertising, etc.). In addition, NetFlow data gives
Market Researchers access to the “who”, “what”, “where”, and “how long” information relevant to
enterprises and service providers.