The network can be connected from the new building to the existing building using either optical fiber or a few copper cables (twisted pair cable), provided that the new building installed the switch to actually connect the network. The copper wire mentioned previously is either CAT5 type, CAT5e type or any other version. A wireless connection can also be used to link the network. So the question here is which one to use to bridge the network. The proposed scenario is that there is an old building and a new building and we want to connect the network from the old to the new. So the answer is either optical fiber, copper wire connection (twisted pair cable), or wireless connection. To discuss which one to use in more detail, there are a few factors to consider when choosing the appropriate cable, namely size, cost, reliability, speed and electrical interference. From a cost perspective, no budget constraints are mentioned in the scenario. If there is no cost limit, it is therefore optical fiber that should be favored. Using fiber optics has some advantages. First, optical fiber is immune to electromagnetic interference. This means that there is no possibility of crosstalk when using optical fiber. Even stormy weather will not affect the transmission rate of optical fiber. The next advantage is the ranged ability. Assuming the two buildings are located 200 or 300 meters apart. According to (ecmag.com, 2000), Cat 5 (or Cat 5 or enhanced Cat 6) has a distance limitation of 90 meters, which is equivalent to 295 feet. This includes the length of cable running up and down walls to avoid HVAC systems, fluorescent lights, electrical wiring, etc. While for optical fiber, the distance can be up to 2 km or more. But if the middle of the paper......the router is connected to the print server and through the 50 PCs directly or wirelessly they can use the printer and the printer will only print from its location respected. level. The switch will also connect to the wireless access point (WAP) through the wireless router. Then, the wireless network will act as a backup to connect to the Internet in the event of a problem with the PC's Ethernet cable. So about 50 PCs will connect via cable and each PC will have a wireless adapter to allow it to connect wirelessly to the Internet in case there is a problem with the Ethernet cable. The layout is the same for all levels. All routers in each tier will connect to the tier 2 server room using a cable rather than a wireless connection. The whole level will be linked together by a central router on level 2 then connect to the modem and finally to the internet.