Background / Scenario Your friend, Natsumi, heard that you are studying networking. She asked you to come over and help her connect her new home to the cable TV network. You need to connect the ...

Asymmetric digital subscriber line, or DSL, uses telephone lines to transfer data to and from computers. Businesses can set up a wired or wireless network on an ADSL connection to avoid cabling in ...

In case your router blocks the random port used by Skype to receive incoming connections, you must manually forward ports 80 and 443, allowing Skype to connect to other clients via TCP. All newer ...

I’ve given a few tips for ways to configure your router, and a reader asked how to log into a specific model. If you act as your own IT department, that basic step may be the only thing keeping you ...

Joel Snyder, Ph.D., is a senior IT consultant with 30 years of practice. An internationally recognized expert in the areas of security, messaging and networks, Dr. Snyder is a popular speaker and ...

Virtual private networks, or VPNs, are an essential tool in any internet privacy toolbox. They  mask your public IP address, ...

Most IT pros realize that using Telnet to manage routers, switches, and firewalls is insecure. Transmitted in clear text across a network, Telnet traffic basically publicizes any login usernames and ...

Lab Purpose: This lab demonstrates inter-VLAN routing using a single physical router interface (Router-on-a-Stick). It ensures: Proper VLAN segmentation. Routing between VLANs. Correct switch and ...