# Introduction to IS-IS **URL:** https://forum.networklessons.com/t/introduction-to-is-is/1725 **Category:** Lessons Discussion **Created:** [May 11, 2017, 1:44pm UTC](https://forum.networklessons.com/t/introduction-to-is-is/1725 "2017-05-11T13:44:45Z") **Posts on this page:** 1 **Showing post:** 62
### Author: ![lagapidis](https://cdn-forum.networklessons.com/user_avatar/forum.networklessons.com/lagapidis/32/4949_2.png) [@lagapidis](https://forum.networklessons.com/u/lagapidis) #### Post date: [November 3, 2021, 7:38am UTC](https://forum.networklessons.com/t/introduction-to-is-is/1725/62 "2021-11-03T07:38:44Z")
Hello Anoop Take a look at this post: > [@OSPF Path Selection explained](https://forum.networklessons.com/t/ospf-path-selection-explained/969/43): > > Hello Swapnil Both IS-IS and OSPF are link state protocols, and both use the same Dijkstra algorithm to compute the best path through the network. However, they do have a few differences in their architecture. You can read more about the differences here: [https://en.wikipedia.org/wiki/IS-IS#Comparison\_with\_OSPF](https://en.wikipedia.org/wiki/IS-IS#Comparison_with_OSPF) Specifically concerning scalability, IS-IS does not use as much bandwidth to function as OSPF and its algorithm is less CPU and memory intensive. As stated in the above link, “Given… I hope this has been helpful! Laz --- _[View the full topic](https://forum.networklessons.com/t/introduction-to-is-is/1725)._