Yes. Cold sores are oral herpes sores. Herpes simplex type 1 virus is the usual cause of oral herpes cold sores, but the type 2 (which usually causes genital herpes) can also cause cold sores on the lips.
Cold Sores. As already stated by my colleagues, yes- cold sores are a form of herpes. The only thing I would add to that, is that many patients and unfortunately some dentists confuse the term "canker sores" also known as aphthous ulcers (and not viral) with "cold sores."
Yes. Cold sores are caused by a herpes simplexvirus (hsv-1) closely related to the one that causes genital herpes (hsv-2). Both of these herpes simplex viruses can affect your mouth or your genitals, and can be spread via oral sex.