SUSPENSION INFO

Hope someone can help me ?
when i'm driving my car an i go over a speed hump it makes a knocking sound i was wondering if i replace my suspension rubbers would it be right again and if so what rubbers do you have to replace seeing that i do not know what rubbers you get by the suspension if use can tel me which ones to replace eg. lower arm etc?![BangHead [smilie=BangHead.gif]](./images/smilies/BangHead.gif)
when i'm driving my car an i go over a speed hump it makes a knocking sound i was wondering if i replace my suspension rubbers would it be right again and if so what rubbers do you have to replace seeing that i do not know what rubbers you get by the suspension if use can tel me which ones to replace eg. lower arm etc?
![BangHead [smilie=BangHead.gif]](./images/smilies/BangHead.gif)