cisco certification for cyber security

cisco certification for cyber security.... ...", NetFlow is a Cisco-owned technology that can be used to gain a comprehensive view of all network traffic traversing Cisco devices (or devices that supportijiNetFlow-enabled devices) of all network traffic traversing Cisco devices (or devices that support the ijiNetFlow feature). Cisco, the company that invented NetFlow, is a leader in IP traffic flow technology.Cisco, the leader in IP traffic flow technology, originally invented NetFlow to audit and bill network traffic and to use NetFlow to measure certain characteristics of IP traffic (for example, bandwidth utilization) and application performance. NetFlow is also a network capacity planning tool that can be used to monitor network availability. Today, NetFlow is used as a network security tool because the reports it generates, in addition to being non-repudiation, provide traffic anomaly detection and review capabilities. When network traffic traverses a NetFlow-enabled device, the device captures the flow data of the traffic and provides network administrators and security managers with detailed information about the flow data. NetFlow is rich in network awareness and can be used to gain insight into what is going on throughout the network. NetFlow can be used to identify DoS attacks, quickly locate compromised endpoint hosts and network infrastructure devices, and monitor network usage by employees, outsourced personnel or partners. NetFlow is also frequently used to sense the condition of the network during security incident response and forensics. NetFlow can also be used to detect misconfiguration of firewalls and improper access to certain resources.NetFlow supports IP version 4 (IPv4) and IP version 6 (IPv6).Internet Protocol Flow Information Export (IPFIX) is a technology similar to NetFlow, which is a network flow standard technology developed by the Internet Engineering Task Force (IETF). The IETF developed IPFIX to develop a common, shared standard for flow information exported from various network devices (routers, switches, firewalls, and other infrastructure devices). The IPFIX standard defines the format in which stream information should be transferred from the exporter to the collectoroIPFIX is defined in RFC 70H-7015 and RFC5l03oCiscoNetFlow version 9 was developed with IPFIX as the basis and primary reference oIPFIX changes some of the terminology of NetFlow and is actually the same in principle as NetFlow version 9.Legacy CiscoNetFlow records are typically exported via UDP messages. The IP address and destination UDP port number of the NetFlow collector must be configured on the device sending (the NetFlow record). The NetFlow standard (RFC3954) does not explicitly specify the UDP port number that the NetFlow collector listens on. The NetFlow standard UDP port number or common UDP port number is 2055, but other UDP port numbers can be used, for example, 9555, 9995, 9025, and 9026o The default UDP port number used by IPFIX is 4739O146 Chapter 2 Network Security Appliances and Cloud Services2.4.1 What is meant by a flow exported by NetFlow,/speech Note A flow or stream is a series of unidirectional packets transmitted between a particular source and destination host. Figurel&s2-21 shows a stream of HTTP data generated between a client and a server. The source/ destination IP address field values, source/ destination port number field values for all packets belonging to the same stream, and the co