Tuesday 9 July 2013
Discussion Topic
Suppose a national security agency wants to connect local networks of its two offices using some transmission media. As they are required to transmit very sensitive information over the transmission media so security and reliability of the information are the critical issues in this scenario. They have different options i.e. wireless and wired (coaxial, fiber optics and etc.) media to connect these offices. You are required to suggest a suitable transmission media to directly connect these offices and discuss how will your suggested media fulfill their requirements?
Read the instructions carefully before sending your comments:
Suppose a national security agency wants to connect local networks of its two offices using some transmission media. As they are required to transmit very sensitive information over the transmission media so security and reliability of the information are the critical issues in this scenario. They have different options i.e. wireless and wired (coaxial, fiber optics and etc.) media to connect these offices. You are required to suggest a suitable transmission media to directly connect these offices and discuss how will your suggested media fulfill their requirements?
Read the instructions carefully before sending your comments:
Twisted pair is the most common, because it is cheapest. Shielded twisted pair is similar, but has a foil around the outside of the pairs to prevent electrical noise, which is good if the cable has to pass over floresent lights. Coaxial is getting outdated, because usually requires a token ring topology. Twisted pair uses a Star topology which means all lines star off from a switch. Optical fiber cable is used for longer distance runs (100 Meters or more), because it does not have the loss of copper wire.
ReplyDeleteSo for a 'large company' it depends on the building size. Usually they have fiber between 2 (or more) office buildings, and twisted pair inside the building from the switch to each workstation. If a cable run needs to be over 100 Meters in 1 building, then either thier needs to be another switch in betweeen or a fiber.