Default [Q]

Searched and did not find this answered elsewhere....

Question 1: Why does a rooted phone need/use VPN Client? I see this running on my S4 M919 / 4.2.2 / bband MDL after xyz rooted & carrier unlocked it... It is also called VPNClientpm It refers to "client 1000".

Question 2: If this app is the client, who is the host?
Thanks.