Write program to simulate a dpda. the dpda specification is read from a text file (see sample on next page). the letters e and y are reserved for ε and ∅ , respectively. the program displays alphabet is: [[the alphabet of the dfa]] enter string. user enters the string the program verifies that the string is legal (if not, outputs a message informing the user and asking to input a legal string). it simulates the dpda on the input string and displays each move it makes (including the contents of the stack) in a convenient format. finally, it determines whether the string is accepted or rejected by the dpda; and displays the string [[user’s string]] is (not) accepted

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.