The Language of Computer Networks

The Language of Computer Networks

Darrell Burch

Grantham University

If a user uses their laptop at a coffee shop to access their email, there are several connections required to make that happen. Microcomputer-to-local area, local area network to wide area network, and wide area network to wide area network are used to make this happen. The user’s laptop must connect to the LAN in the coffee shop to access the internet. The LAN in the coffee shop grants access to the user and allows his request to connect to their internet. The coffee shop WAN initiates a request to the WAN that contains the user’s email account. Once the user’s email WAN grants access the email is returned through the same channels and retrieved through the laptop

If a user gets lost and uses their GPS tracking device to get directions, a Satellite connection is made to get directions. The GPS device will get its current location through a satellite connection. Once the current location has been identified, the satellite makes an internet connection to a server to obtain the directions. The information is sent back to the satellite which in turns sends the data back to the GPS device.

An instant message (IM) between two people is a physical connection. In the OSI model, the logical layers are the layers that lay the groundwork for the transmission of the message to happen. The physical layer is the actual message being sent and retrieved.

A signal starts at point X and loses 8dB while traveling to point Y and is boosted by 10 dB. When the signal travels to point Z, it loses 7dB which will result in a signal strength of -5dB at point Z. At the origination point X, the strength is 0dB. If it loses 8 dB going to point Y, the resulting signal is -8 dB. Once the signal is boosted by 10 dB, the signal strength is now 2 dB. Once the signal loses another 7 dB traveling to point Z, the final signal strength is -5 dB.

The decibel loss of a...