Questions:
1. List five advantages of an optical communications link.
2. What is the purpose of a GBIC?
3. A campus network is planning to put fiber-optic cables in to replace outdated coaxial cables. They have the choice of putting in single-mode, multimode, or a combination of single–multimode fibers in the ground. Which fiber type should they select? Why?
4. What are the four physical layer technologies being used in 802.11 wireless networking?
5. Your company has a suite in a business complex. Another company in the suite next to you has a wireless 802.11b network with an SSID of Company You can pick up their signal from your suite. Your company would like to put up its own wireless network with two access points. Discuss how you would set up these two access points so that your company can obtain optimal performance.
Answers:
1. Five advantages of using commination link are unlimited bandwidth, long transmission distance, low cost, secure transmission, small size and light weight. Optical fiber has no limit about the fact that how fast an information can be transmitted from one location to another (Fang & Luo, 2014). ADSL provide a long mile access and it is not even expensive to send gigabit of data over 120 km by the help of only 1 fiber. There are two sources namely first the signal is radiated beyond the cable and secondly easily tap which is available in parallel channel.
2. GBIC stands for gigabit interface converter which is a transceiver which is converts electrical signal to optical signal in series and vice versa (Neumann, 2013). A GBIC provides a platform in which designer of one type can easily adopt for copper installation. GBIC modules allow various technical to easily make configure and develop electro optical networks.
3. For a campus network they should use single mode optical fibers which has small diametral core which allows one mode light to propagate. The single mode should choose fibers which gives low loss and high bandwidth.
4. The four layers of technologies which are being used in wireless technology that is 802.11 are direct sequence spread spectrum (DSSS), Frequency hopping spread spectrum (FHSS), Orthogonal frequency division multiplexing (OFDM) and infrared.
5. Wireless network should not interfere with 802.11b network of neighbor network. The organization should setup wireless network at 802.11b/g/n. There is also need of proper installation of wired LAN so that the access points can act like transceiver (Sari & Rahnama, 2013). A proper survey must be done on a particular zone and map which the user wants to reach. Proper analysis of wire networks, installed access points, testing of RF courage and support of bandwidth. It must be ensured that SSID is there for authentic user who can have easy access to the network.
References
Fang, F., & Luo, X. G. (2014). Network Equipment Selection Scheme of University Informatization Construction. In Applied Mechanics and Materials (Vol. 599, pp. 1575-1579). Trans Tech Publications.
Neumann, E. G. (2013). Single-mode fibers: fundamentals(Vol. 57). Springer.
Sari, A., & Rahnama, B. (2013, June). Simulation of 802.11 Physical Layer Attacks in MANET. In Computational Intelligence, Communication Systems and Networks (CICSyN), 2013 Fifth International Conference on (pp. 334-337). IEEE.
