Internet PC Networking

We normally use domain name in accessing a homepage like:
http://www.yahoo.com
However, if your computer is accessing to the Internet directly without using a proxy server, it will need to first resolve this domain name (in this case www.yahoo.com) into IP address before it will try to get data from the website.
As for this example, if you [...]

Sometime you may like to limit only certain IP address to access your Cisco router / switch by using telnet. You may implement it by configuring the access list and apply it to the line vty 0 4 line.