The ports on your router are already switch ports. If they weren't, they'd have IP addresses associated with them. DHCP has nothing to do with routers or router functionality, it is included as an added feature. You can turn it off and the device is still a router.
The plant root system constitutes the major part of the plant body, both in terms of function and bulk. In terrestrial plants, the root system is the subterranean or underground part of the plant body while the shoot is the aboveground part. Roots are branching organs which grow downward into the soil, a manifestation of geotropism. Branching occurs irregularly and not from nodes as in stems.
The root system is comprised of the main root (or roots); the root hairs, which are very small but numerous structures that absorb water and nutrients from the ground; lateral roots, which are any roots that branch off of the main root; and the root cap, which provides protection for the growing part of the root.