DNS Cache

Your computer stores a list of IP addresses connected to various domain names. This list is generated as your browser requests DNS (Domain Name System) records from your ISP’s preferred DNS host.

Typing the following command in the Command Prompt that will save the result in a text file (dnshistory.txt) on C drive.

ipconfig /displaydns > c:\dnshistory.txt

Open the file on the C drive using Notepad (or any Text Editor). This file will contain a list of domain names accessed by the computer. Flushing the DNS now and then is also a great way to get over certain sites that may appear to be more sluggish than usual.

You can flush the DNS cache by typing the following command in the Command Prompt.

ipconfig /flushdns

Sidejacking

Sidejacking (session hijacking) is a technique that lets one user literally steal the current Web session of another.

Your password has not been stolen but another user, by "borrowing" your identity, can "be you" for that session (before you logout).

That means, for example, that you could be surfing your Facebook page when, suddenly, someone else is changing your status, posting messages on your friends' pages, and simply impersonating you right under your nose! The same goes for Twitter, other social media sites, and even web-based email.

With SSL (Secure Sockets Layer), all info will be encrypted and you are safe from sidejacking.  GMail was the first major email provider to enable SSL on all users' sessions.