Although fiber optics is very efficient and has better technology than others. But it also has some disadvantages. One of them is system reconfiguration. Upgrading any workspace with fiber optics can take a lot more time and money because every hardware and software must be updated to match the needs of the fiber optics. Sometimes it is really useful to send data at high speed by serial rather than parallel coaction. The change will be necessary in both hardware and software and will still create problems in data transmission because small differences in old programs can cause big problems. We will send something and the recipient will receive something else; which would be totally unreadable. So this whole procedure of changing everything will cost a lot of money. The second most common problem with fiber optics is that it does not have good limitations in the local network. According to executives, it will take longer to change everything despite fiber optics. Upgrading the current network with fiber optics will require a lot of effort and changes that operators are not willing to make. Furthermore, people are happy with what they have. Even with LANs, it would take large amounts of money to switch everything to fiber optics and upgrade every single machine with a new program. Actually, in conclusion, the main problem with fiber optics is that it is very expensive and will be economically advantageous because then every hardware and software will have to be updated as