Some Doubts in Objects

Hello SDN Community..!!

I have some theoritical doubts in XI objects.

<b>Question 1:</b>

what i know about Integration Process is:

Integration Processes are defined in integration Repository.

Processes defined in Integration Repository are used as services at runtime to control messages and send messages.

i want to know the role of <b>Integration Process?</b> and what is the difference between <b>Business Service</b> and <b>Integration Process Service</b>?

<b>Question 2:</b>

While definig Communication Channel.When we select <b>HTTP</b> or <b>IDO</b>C Adapter,the direction can only be <b>reciever</b>,Why so ?

Any kind of help will be appriciated.

Thanks in adavance.

VIJAY RAHEJA.<b></b>