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什么是首选域设置

首选域设置是指在网络或系统中指定首选的域名服务器。当计算机需要解析一个域名时，它会先询问首选域名服务器，如果该服务器无法解析，则会继续询问其它域名服务器。首选域名服务器的选择可以影响网络或系统的性能和可靠性。

Public @ 2023-06-04 02:00:06

二级域名还是一级目录？

读者smart问:都说子站包围主站会很有利,想问一下关于子站的问题子站(二级域名)相对于网站的一级目录来说,权威性是不是要大些?搜索引擎是把子站作为独立的一个站来看待?还是也算为一级目录来看待?如果是作为独立的一个站来看待,那主站的内容就少了,那流量会算进主站吗?这是一个很好的问题，要做好搜索引擎优化，就是要在这种细节的地方多下功夫。搜索引擎会把二级域名当作一个独立的站点来看待，也就是说http:

Public @ 2019-10-04 16:11:37

robots.txt文件的格式

robots文件往往放置于根目录下，包含一条或更多的记录，这些记录通过空行分开（以CR,CR/NL,or NL作为结束符），每一条记录的格式如下所示："<field>:<optional space><value><optionalspace>"在该文件中可以使用#进行注解，具体使用方法和UNIX中的惯例一样。该文件中的记录通常以

Public @ 2015-08-19 16:08:59

什么是首选域设置

网站在做优化的时候有一个专业术语叫首选域，这个专业术语在很多SEO培训机构或者SEO行业前辈经验分享中都有提到过。那究竟什么是首选域的作用，网站如何设置首选域　　什么是首选域呢?　　网站的首选域类似于标准化URL，是搜索引擎索引中编制网页的域。在搜索引擎搜索结果中，指向网站的链接有www和非www网址格式。而所谓的首选域是我们希望网站在搜索结果中显示的格式。　　一般情况下，搜索引擎认为域名带www

Public @ 2021-09-10 16:21:37

什么是首选域设置

首选域设置是指在网络或系统中指定首选的域名服务器。当计算机需要解析一个域名时，它会先询问首选域名服务器，如果该服务器无法解析，则会继续询问其它域名服务器。首选域名服务器的选择可以影响网络或系统的性能和可靠性。

Public @ 2023-06-04 02:00:06

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[ DB ] CONNECT:[ UseTime:0.023166s ] mysql:dbname=briline.net;host=106.14.77.182;port=3306;charset=utf8
[ SQL ] SHOW COLUMNS FROM `ob_article` [ RunTime:0.016643s ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 8406 LIMIT 1 [ RunTime:0.015626s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='cate' order by times desc limit 15 [ RunTime:0.015867s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by times desc limit 100 [ RunTime:0.018393s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using filesort', ) ]
[ SQL ] select * from `ob_article_tongji` where category_id=12 and mark_type='tags' order by rand() limit 30 [ RunTime:0.016294s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article_tongji', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 608, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `id` = 8406 LIMIT 1 [ RunTime:0.015525s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'const', 'possible_keys' => 'PRIMARY', 'key' => 'PRIMARY', 'key_len' => '4', 'ref' => 'const', 'rows' => 1, 'extra' => NULL, ) ]
[ SQL ] update `ob_article` set views=views+1 where id=8406 [ RunTime:0.016281s ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 LIMIT 1 [ RunTime:0.023206s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `cate` = '威海网站结构优化' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.035312s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]
[ SQL ] SELECT COUNT(*) AS tp_count FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海首选域' AND `status` <> -1 LIMIT 1 [ RunTime:0.022504s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where', ) ]
[ SQL ] SELECT * FROM `ob_article` WHERE `category_id` = 12 AND `tags` = '威海首选域' AND `status` <> -1 ORDER BY rand() LIMIT 0,2 [ RunTime:0.032211s ]
[ EXPLAIN : array ( 'id' => 1, 'select_type' => 'SIMPLE', 'table' => 'ob_article', 'type' => 'ALL', 'possible_keys' => NULL, 'key' => NULL, 'key_len' => NULL, 'ref' => NULL, 'rows' => 9562, 'extra' => 'Using where; Using temporary; Using filesort', ) ]

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