# RSVP RESV - need some help **URL:** https://forum.networklessons.com/t/rsvp-resv-need-some-help/11168 **Category:** Quality of Service **Created:** [May 12, 2020, 1:22pm UTC](https://forum.networklessons.com/t/rsvp-resv-need-some-help/11168 "2020-05-12T13:22:36Z") **Posts on this page:** 3 **Page:** 1
### Author: ![Sam.jonsson](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/s/e0b2c6/32.png) [@Sam.jonsson](https://forum.networklessons.com/u/Sam.jonsson) #### Post date: [May 12, 2020, 1:22pm UTC](https://forum.networklessons.com/t/rsvp-resv-need-some-help/11168/1 "2020-05-12T13:22:36Z")
Hi im a little bit confused about the RSVP RESV. Im reading about it in the “offical cert guide” (encor 350-401 from cisco press). On page ![Screenshot_2020-05-12 CCNP and CCIE Enterprise Core ENCOR 350-401 Official Cert Guide](https://cdn-forum.networklessons.com/uploads/default/original/2X/8/8588a78151a42178de74f418c809d76d4c0e5128.jpeg) Dont feel that I get enough explained in the book. dont fully understand why the “previous hop” and "from "adresses are used in that case… can someone please care to explain a little better then in the book ---
### 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: [May 13, 2020, 6:25am UTC](https://forum.networklessons.com/t/rsvp-resv-need-some-help/11168/2 "2020-05-13T06:25:32Z")
A post was merged into an existing topic: [Introduction to RSVP](https://forum.networklessons.com/t/introduction-to-rsvp/1008) ---
### 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: [May 13, 2020, 6:25am UTC](https://forum.networklessons.com/t/rsvp-resv-need-some-help/11168/3 "2020-05-13T06:25:33Z")