There are parts of "active" or Active called. Such as switches and modems, etc.

Date: 5/10/2015       (visite count : 2383)

---

(Domain Name System), which briefly called DNS is a hierarchical database of symbolic names to their IP is distributed over the entire network. The system established in 1984 and developed over the following years.

Date: 5/10/2015       (visite count : 2481)

---