Mechanized infantry are infantry equipped with armored personnel carriers (APCs), or infantry fighting vehicles (IFVs) for transport and combat (see also mechanized force). Mechanized infantry is distinguished from motorized infantry, which is transported to battle by trucks or motor vehicles, in that their vehicles provide a degree of protection from hostile fire, as opposed to "soft-skinned" wheeled vehicles (trucks or jeeps). Most APCs and IFVs are fully tracked, or are all-wheel drive vehicles (6×6 or 8×8), for mobility across rough ground. The support weapons for mechanized infantry are also provided with motorized transport, or are built directly into combat vehicles, in order to keep pace with the mechanized infantry in combat. For units equipped with most types of APC or any type of IFV, fire support weapons such as machine guns, autocannons, small-bore direct-fire howitzers, and even anti-tank guided missiles are often mounted directly on the infantry's own transport vehicles. Compared with "light" (foot-mobile) infantry or motorized infantry, mechanized infantry can maintain rapid tactical movement and (if mounted in IFVs) possess more integral firepower.