e. Users work with IPsec client software installed on their computers launch the remote access client. Client software enables access to applications located on other computers or servers, usually in data centers or the cloud. It is supplied and licensed by the organization that develops the IPsec software. The client software is a special program written to interact with security software located in the data center and cloud. Layer 2 Tunneling Protocol Layer 2 Tunneling Protocol (L2TP) initial versions from Microsoft do not provide encryption and are often replaced by up-to-date versions. There is a new version of L2TP that has improved its tunneling. Like PPTP, it is also used with IPsec for encryption. In addition, IPsec has stronger authentication than L2TP. Secure Sockets Layer/ Transport Layer Security Secure Sockets Layer (SSL)/Transport Layer Security (TLS) is a newer VPN protocol than IPsec. SSL/TLS is a clientless protocol; that is, it does not require the installation of client software on each computer that's used for remote access. Rather, SSL/TLS works from within standard browsers on computers and smartphones. This makes VPNs easier to use and requires less administrative support from IT personnel. The simplified login results in fewer user errors. Recent www.TechnicalPDF.com releases of SSL are referred to as Transport Layer Security (TLS). For added security, SSL is frequently used with tunneling protocols. Because it is a higher-level security protocol, SSL installed on appliances can enable access to particular applications based on privileges granted to classes of employees. An appliance is a specialized computer that is dedicated to a particular application. It's possible for remote computers to pass viruses to corporate networks, SO some SSL appliances have the capability to scan remote computers for antivirus software and automatically download patches to computers that don't have the latest security updates. Other appliances have the capability to remotely wipe out passwords and corporate 