You’re probably familiar with the serial cables that are used to connect external modems with computers. There also exists another type of cable called a null modem cable. How is a null modem cable used?
A) To connect two modems to each other
B) To connect two computers without using a modem
C) To connect two Ethernet adapters together
D) To connect serial printers to a computer
The answer: B) To connect two computers without using a modem
If you want to connect two computers to each other, you can remove the modems from the equation and connect the devices using a null modem cable.
The incorrect answers:
A) To connect two modems to each other
Two modems will usually connect to each other using their native transmission medium. For computer modems, this is often a telephone line.
C) To connect two Ethernet adapters together
Two Ethernet adapters can connect directly to each other using an Ethernet cross-over cable.
D) To connect serial printers to a computer
Serial printers are rare these days, but they can be connected directly to a computer using a standard serial cable.
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Want to know more? Watch “Computer Cable Types.”There are many different personal computer cable types, conventions, and standardizations. In this video, you’ll learn about the different types of cables, how cable design ensures the correct functionality, and an overview of the most common cable types that a CompTIA A+ certified professional might see every day. |