Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 00:00:00,000 --> 00:00:06,000 align:middle line:84% So what are some of the benefits or advantages of link-state routing protocols? 2 00:00:06,000 --> 00:00:11,000 align:middle line:84% Well firstly, faster convergence, changes are reported immediately 3 00:00:11,000 --> 00:00:16,000 align:middle line:84% and links state routing protocols tend to converge a lot quicker 4 00:00:16,000 --> 00:00:19,000 align:middle line:84% than distance vector routing protocol such as RIP. 5 00:00:19,000 --> 00:00:25,000 align:middle line:84% now that said EIGRP which is an enhanced distance vector routing protocol 6 00:00:25,000 --> 00:00:31,000 align:middle line:84% does also converge very quickly, it has the simplicity of configuration 7 00:00:31,000 --> 00:00:34,000 align:middle line:84% of a distance vector routing protocol 8 00:00:34,000 --> 00:00:40,000 align:middle line:84% but does have many of the advantages of a link state routing protocol 9 00:00:40,000 --> 00:00:44,000 align:middle line:84% link state routing protocols are also more robust as the routers 10 00:00:44,000 --> 00:00:48,000 align:middle line:84% know the full topology of the network or area 11 00:00:48,000 --> 00:00:53,000 align:middle line:84% they thus tend to be less susceptible to routing loops 12 00:00:53,000 --> 00:00:56,000 align:middle line:84% because of their great visibility of the network. 13 00:00:56,000 --> 00:01:03,000 align:middle line:84% Routers know the topology and can does work out the best route to every destination. 14 00:01:03,000 --> 00:01:07,000 align:middle line:84% Link state packets are also sequence and acknowledged within OSPF. 15 00:01:07,000 --> 00:01:10,000 align:middle line:84% So if an update I not received by a router 16 00:01:10,000 --> 00:01:13,000 align:middle line:84% it will be retransmitted 17 00:01:13,000 --> 00:01:19,000 align:middle line:84% RIP doesn’t form neighbor relationship or peer relationships but OSPF does. 18 00:01:19,000 --> 00:01:23,000 align:middle line:84% So if 1 router sends an update to a peer 19 00:01:23,000 --> 00:01:29,000 align:middle line:84% and that peer doesn’t acknowledge receipt of the routing update 20 00:01:29,000 --> 00:01:31,000 align:middle line:84% the router will retransmit the update. 21 00:01:31,000 --> 00:01:34,000 align:middle line:84% The hierarchical design of OSPF 22 00:01:34,000 --> 00:01:39,000 align:middle line:84% and other link state routing protocols optimizes resources. 23 00:01:39,000 --> 00:01:42,000 align:middle line:84% It allows for smaller routing tables 24 00:01:42,000 --> 00:01:48,000 align:middle line:84% because of address summarization and fewer Shortest Path First calculation 25 00:01:48,000 --> 00:01:54,000 align:middle line:84% because of address hiding, essentially if the network is designed properly 26 00:01:54,000 --> 00:01:57,000 align:middle line:84% some routers will have very small routing tables 27 00:01:57,000 --> 00:02:02,000 align:middle line:84% compared to others and will do foul fewer calculations. 28 00:02:02,000 --> 00:02:07,000 align:middle line:84% Routers in area 1, for example, will not be aware 29 00:02:07,000 --> 00:02:10,000 align:middle line:84% of all the routes in area 2 or area 3 30 00:02:10,000 --> 00:02:15,000 align:middle line:84% because of the use of summarization on the Area Border Routers 31 00:02:15,000 --> 00:02:20,000 align:middle line:84% and the configuration of special areas such as stub areas. 32 00:02:20,000 --> 00:02:26,000 align:middle line:84% The hierarchical design also allows link state routing protocols to scale 33 00:02:26,000 --> 00:02:32,000 align:middle line:84% and thus work in much larger environments than distances routing protocols could. 34 00:02:32,000 --> 00:02:38,000 align:middle line:84% Large ISPs in the Internet, for example, may run OSPF or ISIS internally 35 00:02:38,000 --> 00:02:44,000 align:middle line:84% within the autonomous systems, OSPF and IS-IS are preferred 36 00:02:44,000 --> 00:02:49,000 align:middle line:84% to routing protocols such as RIP because they are a lot more scalable. 4424