What is a server?
a. an other name for a network administrator
b. software that keeps out unwanted network traffic
c. hardware and software that connects the parts of a network
d. hardware that connects many devices to a network using a single port

Show that there is a language a ⚆ {0, 1} â— with the following properties: 1. for all x â a, |x| ≤ 5. 2. no dfa with fewer than 9 states recognizes a. hint: you don’t have to define a explicitly; just show that it has to exist. count the number of languages satisfying (1) and the number of dfas satisfying (2), and argue that there aren’t enough dfas to recognize all those languages. to count the number of languages satisfying (1), think about writing down all the strings of length at most 5, and then to define such a language, you have to make a binary decision for each string about whether to include it in the language or not. how many ways are there to make these choices? to count the number of dfas satisfying (2), consider that a dfa behaves identically even if you rename all the states, so you can assume without loss of generality that any dfa with k states has the state set {q1, q2, . . , qk}. now think about how to count how many ways there are to choose the other four parts of the dfa.

Q14 what is most important for you to choose before you build a network? a. private network b. nos c. network media d. network protocol e. directory service

The head restraint should be adjusted so that it reaches a.the top of your ears b.the base of your skull c.the top of the head