Mobile Communications are also very popular. It allows laptops to use a network connection to access the network and wander around. It also is used very commonly in warehouse management systems (WMS). The logic is that the staff can access software to manage where inventory should go in the warehouse without needing to slow down to do so. In this case the advantage is in having quality network equipment. If the equipment of the network dies then the entire warehouse stops. This many IT departments install twice the hardware and connect everything to everything. The idea if something fails it doesn't get sick so that the Cisco equipment can realize the issue and reroute without the other dead equipment. The trick is that a failed device must be fixed before another failure happens despite no problems affecting users.
Network Address Translation (NAT) is popular on modern networks. The idea is to simply transform one IP address to a different address. This is useful for example if the PCs all are on a private subnet but need to access the "'net" thru gateways that do the NAT .
A wireless print host can be very useful to the person who gets to print on a wireless network. The goal is that the print server allows the user print to the printer without connecting a cable. All printers need this feature to get print jobs directly from laptop without a cable.
Somebody called Cisco located in California United States of America that manufactures quality routing and switching hardware. OK they are the largest manufacturer of network devices in the world. Cisco controls more than half of the network switching market world wide. Certification with this stuff is therefore quite common.
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