1 00:00:04,420 --> 00:00:06,010 Walk them back once again. 2 00:00:06,010 --> 00:00:09,470 Now when you go out in some of this particular section we just did. 3 00:00:09,810 --> 00:00:12,510 We talked about the network address range. 4 00:00:12,600 --> 00:00:13,730 They're binary right. 5 00:00:13,750 --> 00:00:20,590 They said that the A was 0 for 127 that goes the way the binary bits fell but they're not taking into 6 00:00:20,590 --> 00:00:26,380 consideration the reserved IP addresses that we are not allowed to use. 7 00:00:26,380 --> 00:00:29,270 That's why when we went to the classes of IP addresses. 8 00:00:29,470 --> 00:00:33,740 I showed you that the 1 0 is reserved. 9 00:00:34,120 --> 00:00:37,720 And the 1:27 is your back or we can use that. 10 00:00:37,720 --> 00:00:45,670 So the actual range is 1 through 126 just like the people 169 before you can use that you can use that 11 00:00:45,670 --> 00:00:50,020 address and there's like on it and other addresses and having a whole bunch of other addresses that 12 00:00:50,230 --> 00:00:51,270 are reserved. 13 00:00:51,430 --> 00:00:58,180 And you do not use it you cannot use you can use to two flights multi-pass Gwazi you can use 2 2 4 0 14 00:00:58,180 --> 00:01:01,550 0 9 that's reserved for rent. 15 00:01:01,870 --> 00:01:02,520 You can use that. 16 00:01:02,520 --> 00:01:03,900 So this sort of addresses you can use. 17 00:01:03,910 --> 00:01:11,860 And we learned not only the causes of IP addresses the range rider actual range. 18 00:01:11,860 --> 00:01:14,760 And how do we classify it by looking at the first octet. 19 00:01:14,830 --> 00:01:24,330 And I also told you and I'm going to reiterate this again the saw that mass does not dictate or magically 20 00:01:24,330 --> 00:01:27,630 change the class of address you have. 21 00:01:27,940 --> 00:01:28,510 OK. 22 00:01:29,880 --> 00:01:34,030 Nasir and then we went to the private IP address range. 23 00:01:34,030 --> 00:01:38,400 Again I said please look into the RC look at the Cisco Pressburger this what com. 24 00:01:38,800 --> 00:01:42,300 Get my book dummy IP Bugel Ebony and Amazon. 25 00:01:42,340 --> 00:01:44,250 OK. 26 00:01:44,590 --> 00:01:50,010 No you know you want to go deeper into your dressing something I 2:6 up before whatever. 27 00:01:50,110 --> 00:01:55,540 But Ill show you that the class me and the class-C actually have to so many mass. 28 00:01:55,540 --> 00:02:02,550 WILLIAMS One which the fall the 2 5 5 2 5 0 0 for beat in the 2 4 5 2 5 5 0 4 seed. 29 00:02:02,800 --> 00:02:09,340 But if you see how the numbers change it's really the people who created this the scientists who created 30 00:02:09,340 --> 00:02:09,970 this. 31 00:02:09,970 --> 00:02:18,580 They say well we'll put a 2.5 to 40 year old 0 4 B and 2 5 5 2 5 5 0 0 4 see if needed. 32 00:02:18,580 --> 00:02:19,980 How do you see they use more. 33 00:02:20,230 --> 00:02:21,820 But we don't we don't. 34 00:02:21,820 --> 00:02:22,610 OK we don't. 35 00:02:22,620 --> 00:02:24,550 Go as normal that's more like summarization. 36 00:02:24,690 --> 00:02:25,260 OK. 37 00:02:25,420 --> 00:02:30,050 So just know that they exist in only Cisco Press books have that info. 38 00:02:30,070 --> 00:02:36,340 But with other private IP addresses not rob on the Internet we have to use maps for those of you there. 39 00:02:36,360 --> 00:02:37,320 Those aren't true. 40 00:02:37,430 --> 00:02:39,900 Now let's use nat in order to get out. 41 00:02:40,120 --> 00:02:41,380 OK. 42 00:02:41,980 --> 00:02:42,640 So that's it. 43 00:02:42,760 --> 00:02:44,920 Pretty simple pretty straightforward. 44 00:02:44,950 --> 00:02:51,070 Not a big deal but a very important aspect of it because we need to understand when we're looking at 45 00:02:51,070 --> 00:02:55,930 an address and use that means you know there's one simple simple simple example. 46 00:02:56,270 --> 00:02:59,950 Somebody says hey I can get 20 share in an hour you know my computer is on. 47 00:03:00,160 --> 00:03:06,890 You know I don't see any problem but I can get 20 share I can pray I can get online with a command prompt 48 00:03:07,320 --> 00:03:07,770 type. 49 00:03:07,880 --> 00:03:08,890 I picked one thing. 50 00:03:08,960 --> 00:03:13,460 Slash all and what do you. 51 00:03:14,380 --> 00:03:16,090 Of mine that you do for. 52 00:03:16,320 --> 00:03:22,470 That means that this individual is either either you don't have to be running or you're not getting 53 00:03:22,470 --> 00:03:26,530 an IP address from the server for whatever reason. 54 00:03:26,550 --> 00:03:27,170 OK. 55 00:03:28,830 --> 00:03:34,860 Or if you're static you're not given any static IP address. 56 00:03:34,890 --> 00:03:37,000 So you can troubleshoot that way. 57 00:03:37,170 --> 00:03:37,480 All right. 58 00:03:37,490 --> 00:03:38,980 We're going to troubleshooting. 59 00:03:39,030 --> 00:03:40,720 But just a simple thing. 60 00:03:40,730 --> 00:03:43,730 So when you look at all got people that's when not getting any. 61 00:03:44,120 --> 00:03:44,620 OK. 62 00:03:44,760 --> 00:03:48,660 So you start simple actually walking now for fun. 63 00:03:48,770 --> 00:03:52,520 You release knew the address and see if it picks up in the future. 64 00:03:52,630 --> 00:03:53,450 No. 65 00:03:53,680 --> 00:03:56,610 So when in doubt I'm probably right. 66 00:03:56,900 --> 00:03:58,320 Don't do it. 67 00:03:58,470 --> 00:04:00,340 Take a look inside before you do anything else. 68 00:04:00,540 --> 00:04:05,490 But these are things that we need to know the addresses that we have to work with. 69 00:04:05,490 --> 00:04:08,940 So when we look at the address you say OK that's what's going on. 70 00:04:09,160 --> 00:04:12,320 All know I said in the national.