Authentication question

[Ray Kamali]

If I have a web service which is configured to user windows intergrated
authentication and I want to authenticate to this web service using a windows
app. I know I should use

something like :

MyService.Credentail= CredentialCache.DefaultCredentail();

OR

MyService.Credentail= new networkCredentail("User","password","domain");

My question is: Given the fact this web service is using Windows Integrated
authentication , Are any of two methods of authentication (mentioned above)
send the credentials in clear text over the wire? If so How Can I protect
this?

Thanks a lot