Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:00,000 --> 00:00:05,000 align:middle line:84% Classless routing protocols, on the other hand, do advertise the subnet mask. 2 00:00:05,000 --> 00:00:15,000 align:middle line:84% So as an example, they would advertise network 10.0.0.0/24 or 10.0.0.0/30 3 00:00:15,000 --> 00:00:18,000 align:middle line:84% They are advertising both the network and the subnet mask 4 00:00:18,000 --> 00:00:21,000 align:middle line:84% in the routing protocol advertisements 5 00:00:21,000 --> 00:00:25,000 align:middle line:84% routers are therefore able to see the exact network mask 6 00:00:25,000 --> 00:00:30,000 align:middle line:84% and do not have to assume what the network mask is 7 00:00:30,000 --> 00:00:33,000 align:middle line:84% on routing updates received from neighbors 8 00:00:33,000 --> 00:00:40,000 align:middle line:84% classless routing protocols also support Variable Length Subnet Mask or VLSM 9 00:00:40,000 --> 00:00:45,000 align:middle line:84% in other words, the mask of interfaces do not have to be the same. 10 00:00:45,000 --> 00:00:48,000 align:middle line:84% one interface could have a mask of /24 11 00:00:48,000 --> 00:00:52,000 align:middle line:84% and another interface could have a mask of /20 12 00:00:52,000 --> 00:00:57,000 align:middle line:84% as an example on serial interfaces or serial links 13 00:00:57,000 --> 00:01:03,000 align:middle line:84% you may want to use a /30 mask on a loopback interface on a router 14 00:01:03,000 --> 00:01:08,000 align:middle line:84% you may wanna use a /32 mask and on networks 15 00:01:08,000 --> 00:01:12,000 align:middle line:84% where hosts reside you may wanna use /24 mask 16 00:01:12,000 --> 00:01:17,000 align:middle line:84% in other words, on routers, Variable Length Subnet Mask are supported 17 00:01:17,000 --> 00:01:20,000 align:middle line:84% different interfaces can have different masks. 18 00:01:20,000 --> 00:01:27,000 align:middle line:84% Classless routing protocols also support manual summarization of routes. 19 00:01:27,000 --> 00:01:30,000 align:middle line:84% This depends on the routing protocol as an example 20 00:01:30,000 --> 00:01:37,000 align:middle line:84% OSPF supports summarization on what are called Area Border Routers or ABR's 21 00:01:37,000 --> 00:01:41,000 align:middle line:84% as well as Autonomous System Border Routers or ASBR's 22 00:01:41,000 --> 00:01:45,000 align:middle line:84% EIGRP supports summarization on any interface 23 00:01:45,000 --> 00:01:50,000 align:middle line:84% examples of classless routing protocols include RIP version 2, EIGRP, OSPF and ISIS. 2802