1 00:00:00,000 --> 00:00:02,952 [MUSIC PLAYING] 2 00:00:02,952 --> 00:00:08,870 3 00:00:08,870 --> 00:00:12,360 Congratulations on completing another skill. 4 00:00:12,360 --> 00:00:17,010 Now it's time for a review in the form of a quiz. 5 00:00:17,010 --> 00:00:21,490 So let's go ahead and jump in with our first question. 6 00:00:21,490 --> 00:00:23,400 Which of the following statements 7 00:00:23,400 --> 00:00:28,740 is true regarding the default behavior of communities 8 00:00:28,740 --> 00:00:30,975 on IOS XE routers? 9 00:00:30,975 --> 00:00:36,860 10 00:00:36,860 --> 00:00:39,260 So let's just go down our list. 11 00:00:39,260 --> 00:00:43,270 Number 1 says, sent but not received. 12 00:00:43,270 --> 00:00:45,340 Well, if you remember when we were 13 00:00:45,340 --> 00:00:47,560 going through our demonstration, we 14 00:00:47,560 --> 00:00:52,580 had to actually configure IOS XE to send communities. 15 00:00:52,580 --> 00:00:56,270 So, 1 is definitely an incorrect answer. 16 00:00:56,270 --> 00:01:00,340 Number 2, neither sent nor received. 17 00:01:00,340 --> 00:01:01,930 This one's a little bit interesting, 18 00:01:01,930 --> 00:01:05,209 because they actually are received. 19 00:01:05,209 --> 00:01:07,690 We didn't discuss that specifically. 20 00:01:07,690 --> 00:01:09,640 However, the fact that we had to configure 21 00:01:09,640 --> 00:01:12,730 them to be sent but not received, hopefully 22 00:01:12,730 --> 00:01:14,390 gave you a hint there. 23 00:01:14,390 --> 00:01:20,060 So, 2 is also incorrect because they are received-- 24 00:01:20,060 --> 00:01:24,190 which of course, leads us to 3 being correct. 25 00:01:24,190 --> 00:01:28,540 Because we just said they are received, but they're not sent. 26 00:01:28,540 --> 00:01:33,440 Of course, 4 would have to be incorrect if 3 is correct. 27 00:01:33,440 --> 00:01:39,070 So that means our correct answer to this question is number 3. 28 00:01:39,070 --> 00:01:40,670 Next question. 29 00:01:40,670 --> 00:01:44,290 If an IOS router receives an update 30 00:01:44,290 --> 00:01:49,120 without the MED attribute set, what is the default behavior? 31 00:01:49,120 --> 00:01:55,110 32 00:01:55,110 --> 00:01:58,280 So of course, the key to this is we're receiving the update 33 00:01:58,280 --> 00:02:01,370 without the MED attribute. 34 00:02:01,370 --> 00:02:05,600 And without the MED attribute, the Cisco IOS 35 00:02:05,600 --> 00:02:08,300 considers that to be a 0. 36 00:02:08,300 --> 00:02:10,850 And unfortunately, that means that we're going 37 00:02:10,850 --> 00:02:14,250 to treat it as the best value. 38 00:02:14,250 --> 00:02:16,730 Now, that of course would make 2 incorrect. 39 00:02:16,730 --> 00:02:19,940 It's not going to be treated as the worst value. 40 00:02:19,940 --> 00:02:25,730 However, keep in mind, we can enable MED missing as worst. 41 00:02:25,730 --> 00:02:29,000 In that case, 2 would become correct, 42 00:02:29,000 --> 00:02:32,130 and 1 would not be correct, of course. 43 00:02:32,130 --> 00:02:35,120 However, the thing is, this question specifically 44 00:02:35,120 --> 00:02:40,290 said the default behavior without enabling any features. 45 00:02:40,290 --> 00:02:42,800 Now, of course, 3 is incorrect-- set it 46 00:02:42,800 --> 00:02:45,350 to the default value of 100. 47 00:02:45,350 --> 00:02:49,520 The default value of 100 is actually 48 00:02:49,520 --> 00:02:54,860 the default value for local preference, not for MED. 49 00:02:54,860 --> 00:02:58,970 Finally, of course, answer 4, to ignore it, also not correct. 50 00:02:58,970 --> 00:03:03,000 Although, honestly, that might actually be a better choice. 51 00:03:03,000 --> 00:03:08,390 But as it is, the correct answer to this question is number 1. 52 00:03:08,390 --> 00:03:10,560 So that concludes this quiz. 53 00:03:10,560 --> 00:03:13,400 If you find that you are missing any of the information 54 00:03:13,400 --> 00:03:15,440 to answer these questions, I would 55 00:03:15,440 --> 00:03:19,100 encourage you to go back and review the sources referenced 56 00:03:19,100 --> 00:03:20,940 on each question. 57 00:03:20,940 --> 00:03:25,400 Otherwise, congratulations on completing Implementing Inbound 58 00:03:25,400 --> 00:03:27,630 BGP Path Selection. 59 00:03:27,630 --> 00:03:29,990 I hope this has been informative for you, 60 00:03:29,990 --> 00:03:33,220 and I'd like to thank you for viewing. 61 00:03:33,220 --> 00:03:36,427