final-f23-cover

Final Examination Thursday, May 4, 2023, 12:10–2:00pm in SCOB 228 Last Name, First Name(s) Sample , Ima (1111111111) sample@asu.edu Exam Number #1 Instructions: 1. This exam is administered on PrairieLearn. You must NOT navigate away from PrairieLearn during the exam. If you are caught on some other page, you will be assigned a grade of zero on the exam. ( https://us.prairielearn.com/pl/course instance/129704/assessments ). 2. This exam is closed book , i.e. , no books or notes are allowed. A scientific calculator (not Internet- enabled) may be used; no other aids are permitted. 3. Make sure all devices ( e.g. , phones, watches) are o ↵ . Put them in your backpack or with your books. Place backpacks, notes, texts, etc. at the back or front walls of the classroom. Do not put them on the stairs or at your feet. 4. An exam proctor will check your photo id and obtain your signature on a sign-in sheet; if you do not sign this sheet you will be assigned a zero on the exam. Binary to Decimal Conversion Last 4 bits ± First 4 bits ² 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111 0000 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 0001 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 0010 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 0011 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 0100 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 0101 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 0110 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 0111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 1000 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 1001 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 1010 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 1011 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 1100 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 1101 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 1110 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 1111 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 Powers of Two n 0 1 2 3 4 5 6 7 8 9 10 11 12 2 n 1 2 4 8 16 32 64 128 256 512 1024 2048 4096 Data Rates Units of Time Misc. kilobit per second kbps 10 3 1000 1 Millisecond ms or msec 10 - 3 s 1 km 1000 m megabit per second Mbps 10 6 1000 2 Microsecond μ s 10 - 6 s 1 byte 8 bits gigabit per second Gbps 10 9 1000 3 Nanosecond ns 10 - 9 s Types of delay: d nodal = d proc + d queue + d trans + d prop where d trans = L/R and d prop = d/s . Packet switching: specific user active p (1 - p ) N - 1 , any user active Np (1 - p ) N - 1 , any k of N is active ( N k ) p k (1 - p ) N - k , more than k active P N i = k +1 ( N i ) p i (1 - p ) N - i .