Dns

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[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],Thường xử dụng xác định dịch vụ web hosting Canonical NAME CNAME Xác định chuyển từ địa chỉ IP sang tên miền Mail Exchanger MX Ánh xạ xác định địa chỉ IP của một host Host A Chuyển quyền quản lý tên miền xuống một DNS cấp thấp hơn Name Server NS Xác định máy chủ DNS có thẩm quyền cung cấp thông tin về tên miền xác định trên DN Start of Authority SOA Mục đích Tên đầy đủ Tên trường

[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

[object Object],. vnn com edu gov com edu gov uk fr vn

[object Object],www – 203.162.50.100 mail – 203.162.50.101 Lab – 203.160.100.1 ctt – 203.162.50.1 aaa – 203.162.70.201 bbb – 203.160.9.7 . vn com ctt www.ctt.com.vn 203.162.50.100 www 203.162.4.10 203.162.50.1 203.162.0.1 63.63.0.1

[object Object],Request Reply vnn yahoo com vn . Address of com server Address of yahoo.com server Address of www.yahoo.com Address of www.yahoo.com

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],Path of the directory where server configuration files are located (the default value: /var/named/ ) Usage: directory “path to directory”; directory Accepts queries only from hosts in the address list (by default queries are accepted from any host). Usage: allow-query {“address-list”}; allow-query Meaning Value

[object Object],Specifies a list of valid IP addresses for nameservers where requests should be forwarded for resolution. Usage: forwarders {“address-list”}; forwarders Controls whether named notifies the slave servers when a zone is updated. It accepts the following options: yes — Notifies slave servers. no — Does not notify slave servers. notify Controls forwarding behavior of a forwarders directive. If set to first , the servers listed in the forwarders option are queried first, and then the server tries to find the answer itself. If set to only , just the servers in the forwarders list are queried. Usage: forward “ first or only ”; ( choose one ). forward Meaning Value

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Dns

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