Reword network requirements. (#173)

Signed-off-by: Hannah Troisi <htroisi@pixielabs.ai>

Author: htroisi

content/en/02-installing-pixie/01-requirements.md

@@ -86,6 +86,6 @@ Pixie may also work on other distributions.
 
 ## Network Traffic
 
-Pixie's Vizier Module sends outgoing HTTPS/2 requests to `withpixie.ai:443`.
+Pixie's [Vizier](/reference/architecture/#vizier) module sends outgoing HTTPS/2 requests to Pixie's [Cloud](/reference/architecture/#cloud) on port `443`.
 
-Your cluster's data flows through Pixie's control cloud via a reverse proxy as encrypted traffic without any persistence. This allows users to access data without being in the same VPC/network as the cluster. Pixie offers [end-to-end encryption](https://docs.px.dev/about-pixie/faq#how-does-pixie-secure-its-data) for telemetry data in flight.
+Your cluster's telemetry data flows through Pixie's Cloud via a reverse proxy as encrypted traffic without any persistence. This allows users to access data without being in the same VPC/network as the cluster. Pixie offers [end-to-end encryption](/about-pixie/faq#data-collection-how-does-pixie-secure-its-data) for telemetry data in flight.