9L0-415 Web TestEngine demo

The OS X Mavericks installer can be downloaded from the Mac App Store for free.

Keychains are used to store secrets such as resource passwords, digital certificates, and encryption

keys. The keychain system can also securely store Safari AutoFill information, Internet Account settings, and secure text notes.

The Archive option in the Finder creates compressed zip archive files.

The DNS service is used to translate host names to IP addresses via forward lookups and translate IP addresses to host names via reverse lookups. DNS is architected as a hierarchy of worldwide domain servers. Local DNS servers provide name resolution and possibly host names for local clients. These local DNS servers connect to DNS servers higher in the DNS hierarchy to resolve both unknown host names and host local domain names.