tailieunhanh - sams teach yourself tcp ip in 24 hours phần 8

dịch vụ khác nhau được bắt đầu, một sốcần phải được thực hiện các máy tính vụ phải đăng ký. Một WINS máy tính khách hàng các gói tên NetBIOS và địa chỉ IP của máy tính bên trong một yêu cầu đăng ký tên, và yêu cầu đăng ký được gửi đến máy chủ WINS. Khi nhận được yêu cầu đăng ký, WINS kiểm tra cơ sở dữ liệu của nó | What Happens on the Internet 299 FIGURE An ISP leases a Point of Presence POP on the Internet. In Hour 1 What Is TCP IP you learned about the organizations governing the Internet including the Internet Advisory Board IAB and the Internet Engineering Task Force IETF . The language of the Internet is of course TCP IP but it is worth highlighting a significant element of the TCP IP infrastructure that provides for Internet messaging on a global scale the common naming and numbering system overseen by ICANN. The DNS naming system is more than the name resolution protocols described in Hour 11 Name Resolution. Name service on a global scale requires an enormous human effort to manage the lower-tier organizations that manage the orderly assignment of Internet names. Without the powerful DNS naming system the Internet would not be the pervasive force in daily life it is today. What Happens on the Internet The Internet really is a big TCP IP network and if you re not worried about security or time delays you can use the Internet for almost anything you can do on a routed corporate LAN. Of course the security considerations are substantial. You definitely should not use the Internet for anything you could do on a routed corporate LAN but you could if you wanted to. Hours 22 and 23 discuss some of the reasons why you need to be more careful about security in an unprotected space like the open Internet. From the Library of Athicom Parinayakosol 300 HOUR 16 The Internet A Closer Look It is important to remember that all computers participating in a networking activity on the Internet or on any other network have one thing in common They are running software that was designed for the activity in which they are engaged. Networking doesn t just happen. It requires protocol software such as the TCP IP software described in Hours 2-7 and it also requires applications at each end of the connection that are specifically designed to communicate with each other. As shown in Figure