Internet Protocol Security, often written as IPSec, is the process in which communications over a network are secure with encoded authentication. It defends the IP packets and prevents network attacks. Data and identity is breached without proper security implementation, granting intruders unauthorized access.
The advantages of IPSec include having the option to use it on many different operating systems. It also supports virtual private networks for encrypted remote entry, similar to the two contrasting approaches, such as transport mode and tunnel mode. Failure in core networking services, such as DHCP, DNS and WINS, can cause unpredictable IPSec failures, according to Microsoft. Two types of communication failures are intranet and remote, and both require general troubleshooting.