IPSec is a set of open network security protocols, collectively, provides for the network layer can provide access control, connectionless integrity, data origin authentication, anti-replay protection, encryption, and data stream encryption and other security services category. It consists of two security protocols: Authentication Header and Encapsulating Security Payload. AH major functions provided by the data source authentication, data integrity, message authentication and anti-replay function. The function of ESP in the AH protocol in addition to providing IP packet encryption. In addition, IPSec is often used for secure Internet Key Exchange protocol auto-negotiation parameters. IPSec VPN implementation can be carried out by the operator, it can be carried by the user, but generally implemented by the user. IPSec support for networking include: host, host and gateway, the gateway between the network. In addition, IPSec can also support remote access users. IPSec can work in the IP network, so in non-IP networks require such as IPSec and L2TP or GRE tunneling protocol used in combination.
IE8 in the speed and security, ease of use has been enhanced. Microsoft executives said, IE8 enhanced security features to help users out of protection of existing and new network security threats than other browsers can prevent malicious software 2-4 times the number of attacks. According to reports, IE8 features, including smart address bar, tab groups, re-designing the "new tab" page, to re-open the last viewed page, the enhanced "search page", these features will make IE8 more quickly, convenient. IE8 also provides IT professionals to facilitate the new features, so these people can be more convenient to deploy and manage. Such as Slipstream installation, simplifying the IE Administration Kit, Group Policy enhanced.