What are the disadvantages of a server-based network?

select all that apply

NOS needs to be installed on each workstation

server problems disrupt network

need for a network administrator

lack of centralized network security

The ieee 802.11: defines standards for wireless local area network (wlan) communication protocols. identifies various computers or devices connected to a network. verifies any resource attached to another computer on a network that is different from the computer to which the user is logged on. connects multiple local area networks (lans) and wide area networks (wans).