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Routers perform many different jobs like forward traffic between or within organization or routers because whole traffic that makes up the internet is directed by backbone routers. These backbone routers are designed and configured to forward traffic as quickly as possible. Backbone routers are typically employing exterior gateway protocols to manage routers and Cisco security training, their main goal is to ensure that management and operations are conducted by authorized parties. Some of general attacks on routers include unauthorized access, session hijacking, rerouting, denial of services and information theft. Rerouting attacks can include manipulating routers updates to cause traffic to flow to unauthorized destinations. session hijacking attacks may be occur if an attacker can interest falsified IP packets after session establishment via IP spoofing . Land attack may cause denial of service or degrade the performance of router by sending a packet to router with same IP address with same port number in source port and destination port field. If you want to get Cisco security training then please visit www.qosnetworking.com.