The A refers to the certification on theâ¦ Airframe structure, to work on the wings, structure of the Frame or assemblies such as air vents for repairs. The P stands for Power Plant, The Certification repair for an Engine of a craft which also includes the hydraulic system.
Protocols. There are a number of VPN protocols in use that secure the transport of data traffic over a public network infrastructure. Each protocol varies slightly in the way that data is kept secure. IP security (IPSec) is used to secure communications over the Internet. IPSec traffic can use either transport mode or tunneling to encrypt data traffic in a VPN.
Normally this Internet Protocol Security or IPSec is a system that is applied in the VPN. This Virtual Private Network is a process to increase the security of internet by hiding the ip address and also hiding the original identity.ut most of the VPN use this Ipsec. Because it can in any remote device by just installing a client software. IPSec works on the IP security. It is normally used when there is any need to communicate others via net.