Two subdomains pointing to two different hosts?

For example, let's say I have domain.com. Can I configure http://subdomain1.domain.com to be hosted on http://www.squarespace.com and http://subdomain2.domain.com to be hosted o开发者_运维技巧n http://www.discountasp.net/?

Yes. Set the A record of subdomain1 to point to the IP of your site at squarespace.com and the A record for subdomain2 to point to the IP being hosted at discountasp.net.

Yes - either use a CNAME record and point it to each of those domains, or an A record for the full domain (subdomain1.domain.com) pointed at the IP address you need.