1 00:00:02,360 --> 00:00:07,940 ‫Now, to be honest, there are a number of different types of violent attacks and modern switch networks. 2 00:00:08,660 --> 00:00:14,490 ‫The violent architecture simplifies network maintenance and improves performance, but it also opens 3 00:00:14,490 --> 00:00:15,560 ‫the door to abuse. 4 00:00:16,190 --> 00:00:20,780 ‫So it's important to understand the general methodology behind these attacks. 5 00:00:21,170 --> 00:00:23,600 ‫And the primary approaches to mitigate them. 6 00:00:24,680 --> 00:00:30,410 ‫Velan hopping enables traffic from one villain to be seen by another villain. 7 00:00:31,570 --> 00:00:32,740 ‫Sounds kind of fun, huh? 8 00:00:35,420 --> 00:00:42,170 ‫So as we've already seen before, a virtual local area network of virtual land, or VLAN, is a group 9 00:00:42,170 --> 00:00:48,650 ‫of hosts with a common set of requirements which communicate as if they were attached to the same broadcast 10 00:00:48,650 --> 00:00:51,530 ‫domain, regardless of their physical location. 11 00:00:52,620 --> 00:00:59,390 ‫Vans work by applying tags to network packet and handling these tags in networking systems, creating 12 00:00:59,390 --> 00:01:04,760 ‫the appearance and functionality of network traffic that is physically on a single network. 13 00:01:05,450 --> 00:01:09,050 ‫But act as if it is split between separate networks. 14 00:01:10,200 --> 00:01:10,710 ‫Copies. 15 00:01:14,760 --> 00:01:18,810 ‫So let's take a moment and remember the reasons of why we are using violence. 16 00:01:19,980 --> 00:01:20,580 ‫Security. 17 00:01:21,670 --> 00:01:25,720 ‫Groups that have sensitive data are separated from the rest of the network. 18 00:01:27,650 --> 00:01:28,610 ‫Cost reduction. 19 00:01:29,570 --> 00:01:34,010 ‫Cost savings result from less of a need for expensive network upgrades. 20 00:01:35,760 --> 00:01:36,690 ‫Higher performance. 21 00:01:37,620 --> 00:01:42,900 ‫The number of router hops reduces and the apparent bandwidth for network users increases. 22 00:01:44,450 --> 00:01:46,250 ‫Broadcast storm mitigation. 23 00:01:47,270 --> 00:01:50,750 ‫Every villain only receives its own broadcast packets. 24 00:01:53,090 --> 00:01:55,340 ‫Improved it, staff efficiency. 25 00:01:56,630 --> 00:02:00,230 ‫As we were talking about before, VLANs make it easier to manage the network. 26 00:02:00,950 --> 00:02:03,320 ‫It also simplifies the company's management.