Consider a system where free space is kept in a free-space list.
a) suppose that the pointer to the free-space list is lost. can the system reconstruct the free-space list? explain your answer.
b) consider a file system similar to the one used by unix with indexed allocation. how many disk i/o operations might be required to read the contents of a small local file at /a/b/c? assume that none of the disk blocks is currently being cached.
c) suggest a scheme to ensure that the pointer is never lost as a result of memory failure.

Respond to the following in three to five sentences. select the workplace skill, habit, or attitude described in this chapter that you believe is most important for being a successful employee.

Aspeed limit sign that says "night" indicates the legal speed between sunset and sunrise.

Local area networks use many of the same network technologies and the internet, only on a smaller scale. devices that access lans are equipped with a network interface that contains circuitry for wireless or wired connections. devices also have a physical address, in addition to the ip addresses acquired from a dhcp server. the most popular wired technology is . the most popular wireless technology is , which can be configured as a(n) or star topology. setting up a lan and configuring its router is fairly easy. the first step is to change the standard to one that is secure. next, create a(n) that uniquely identifies the network by name. it is also important to activate wireless to prevent wireless signals from being intercepted during transmission. a limited-access network can be created for visitors to use. by activating , the router will be able to assign ip addresses to each device that joins the network. to connect to a secure lan that is protected by encryption, an encryption , or password, is required. lans can be used to access data collected by iot devices and the networks that tie these devices together. technologies such as rfid, nfc, bluetooth smart, zigbee, and z-wave offer -power links, essential for battery-powered devices that can’t expend excess amounts of energy transmitting data.