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Introduccion a las Redes Inalambricas

Posted on: junio 7, 2011

Hola que tal amigos aqui les dejo este

increible libro de

Introduccion a Las Redes Inalambricas

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Introduccion a Las Redes Inalambricas
Anaya Multimedia | ISBN 8441515611 | PDF | Spanish  | 384 pages | 15.5 MB

¿Qué queremos decir exactamente cuando hablamos de redes inalámbricas?
Para el propósito de este libro, casi siempre estamos hablando de una tecnología de radio de corto alcance sin patente llamada IEEE 802.11b, también conocida como Wi-Fi(es una abreviatura de Wireless Fidelity, creada por una asociación comercial). Aunque a veces hablaremos de redes para Macintosh y para Windows por precisión, utilizaremos principalmente Wi-Fi a lo largo de este libro para evitar confusiones. Wi-Fi no es ni mucho menos la única tecnología de redes inalámbricas, pero es de lejos la más común.

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BUENO AMIGOS AQUI LES DEJO EL LINK DEL LIBRO


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0) { $start_date = sprintf( "%04d-%02d-%02d", $aa_start, $mm_start, 1 ); } else { $start_date = 'all'; } if($mm_end != 'all' && $aa_end > 0) { if($mm_end == 12) { $mm_end = 1; $aa_end++; } else { $mm_end++; } $end_date = sprintf( "%04d-%02d-%02d", $aa_end, $mm_end, 1 ); } else { $end_date = 'all'; } ra_export_setup(); ra_export_wp( $author, $category, $post_type, $status, $start_date, $end_date, $terms ); die(); } } function ra_export_wp($author='', $category='', $post_type='', $status='', $start_date='', $end_date='', $terms = '') { global $wpdb, $post_ids, $post; define('WXR_VERSION', '1.0'); do_action('export_wp'); if(strlen($start_date) > 4 && strlen($end_date) > 4) { $filename = 'wordpress.' . $start_date . '.' . $end_date . '.xml'; } else { $filename = 'wordpress.' . date('Y-m-d') . '.xml'; } header('Content-Description: File Transfer'); header("Content-Disposition: attachment; filename=$filename"); header('Content-Type: text/xml; charset=' . get_option('blog_charset'), true); if ( $post_type and $post_type != 'all' ) { $where = $wpdb->prepare("WHERE post_type = %s ", $post_type); } else { $where = "WHERE post_type != 'revision' "; } if ( $author and $author != 'all' ) { $author_id = (int) $author; $where .= $wpdb->prepare("AND post_author = %d ", $author_id); } if ( $start_date and $start_date != 'all' ) { $where .= $wpdb->prepare("AND post_date >= %s ", $start_date); } if ( $end_date and $end_date != 'all' ) { $where .= $wpdb->prepare("AND post_date db_version(), '4.1', 'ge')) { $taxomony_id = (int) $category; $where .= $wpdb->prepare("AND ID IN (SELECT object_id FROM {$wpdb->term_relationships} " . "WHERE term_taxonomy_id = %d) ", $taxomony_id); } if ( $status and $status != 'all' ) { $where .= $wpdb->prepare("AND post_status = %s ", $status); } // grab a snapshot of post IDs, just in case it changes during the export $post_ids = $wpdb->get_col("SELECT ID FROM $wpdb->posts $where ORDER BY post_date_gmt ASC"); $categories = (array) get_categories('get=all'); $tags = (array) get_tags('get=all'); while ( $parents = wxr_missing_parents($categories) ) { $found_parents = get_categories("include=" . join(', ', $parents)); if ( is_array($found_parents) && count($found_parents) ) $categories = array_merge($categories, $found_parents); else break; } // Put them in order to be inserted with no child going before its parent $pass = 0; $passes = 1000 + count($categories); while ( ( $cat = array_shift($categories) ) && ++$pass parent == 0 || isset($cats[$cat->parent]) ) { $cats[$cat->term_id] = $cat; } else { $categories[] = $cat; } } unset($categories); echo '\n"; ?> <rss version="2.0" xmlns:excerpt="http://wordpress.org/export//excerpt/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:wp="http://wordpress.org/export//" > http://wordpress.org/?v= slug; ?>parent ? $cats[$c->parent]->name : ''; ?> slug; ?> in_the_loop = true; // Fake being in the loop. // fetch 20 posts at a time rather than loading the entire table into memory while ( $next_posts = array_splice($post_ids, 0, 20) ) { $where = "WHERE ID IN (".join(',', $next_posts).")"; $posts = $wpdb->get_results("SELECT * FROM $wpdb->posts $where ORDER BY post_date_gmt ASC"); foreach ($posts as $post) { setup_postdata($post); ?> post_title); ?> post_content) ); ?> post_excerpt) ); ?> ID; ?> post_date; ?> post_date_gmt; ?> comment_status; ?> ping_status; ?> post_name; ?> post_status; ?> post_parent; ?> menu_order; ?> post_type; ?> post_password; ?> post_type == 'attachment') { ?> ID); ?> get_results( $wpdb->prepare("SELECT * FROM $wpdb->postmeta WHERE post_id = %d", $post->ID) ); if ( $postmeta ) { ?> meta_key; ?> meta_value; ?> get_results( $wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d", $post->ID) ); if ( $comments ) { foreach ( $comments as $c ) { ?> comment_ID; ?> comment_author); ?> comment_author_email; ?> comment_author_url; ?> comment_author_IP; ?> comment_date; ?> comment_date_gmt; ?> comment_content) ?> comment_approved; ?> comment_type; ?> comment_parent; ?> user_id; ?> <?php } function ra_export_page() { global $wpdb, $wp_locale; if(!current_user_can('edit_files')) { die( 'You don\'t have permissions to use this page.' ); } $months = ""; for ( $i = 1; $i < 13; $i++ ) { $months .= "\t\t\t' . $wp_locale->get_month_abbrev( $wp_locale->get_month( $i ) ) . "\n"; } ?>

db_version(), '4.1', 'ge')) { ?>
         
get_col( "SELECT post_author FROM $wpdb->posts GROUP BY post_author" ); foreach ( $authors as $id ) { $o = get_userdata( $id ); echo "ID}'>{$o->display_name}\n"; } ?>
<?php $categories = (array) get_categories('get=all'); if($categories) { foreach ( $categories as $cat ) { echo "term_taxonomy_id}'>{$cat->name}\n"; } } ?>

<input type="submit" name="submit" class="button" value="" />

term_id] = $category->parent; $parents = array_unique(array_diff($parents, array_keys($parents))); if ( $zero = array_search('0', $parents) ) unset($parents[$zero]); return $parents; } } if(!function_exists('wxr_cdata')) { function wxr_cdata($str) { if ( seems_utf8($str) == false ) $str = utf8_encode($str); // $str = ent2ncr(wp_specialchars($str)); $str = ""; return $str; } } if(!function_exists('wxr_site_url')) { function wxr_site_url() { global $current_site; // mu: the base url if ( isset($current_site->domain) ) { return 'http://'.$current_site->domain.$current_site->path; } // wp: the blog url else { return get_bloginfo_rss('url'); } } } if(!function_exists('wxr_cat_name')) { function wxr_cat_name($c) { if ( empty($c->name) ) return; echo '' . wxr_cdata($c->name) . ''; } } if(!function_exists('wxr_category_description')) { function wxr_category_description($c) { if ( empty($c->description) ) return; echo '' . wxr_cdata($c->description) . ''; } } if(!function_exists('wxr_tag_name')) { function wxr_tag_name($t) { if ( empty($t->name) ) return; echo '' . wxr_cdata($t->name) . ''; } } if(!function_exists('wxr_tag_description')) { function wxr_tag_description($t) { if ( empty($t->description) ) return; echo '' . wxr_cdata($t->description) . ''; } } if(!function_exists('wxr_post_taxonomy')) { function wxr_post_taxonomy() { $categories = get_the_category(); $tags = get_the_tags(); $the_list = ''; $filter = 'rss'; if ( !empty($categories) ) foreach ( (array) $categories as $category ) { $cat_name = sanitize_term_field('name', $category->name, $category->term_id, 'category', $filter); // for backwards compatibility $the_list .= "\n\t\t\n"; // forwards compatibility: use a unique identifier for each cat to avoid clashes // http://trac.wordpress.org/ticket/5447 $the_list .= "\n\t\tslug}\">\n"; } if ( !empty($tags) ) foreach ( (array) $tags as $tag ) { $tag_name = sanitize_term_field('name', $tag->name, $tag->term_id, 'post_tag', $filter); $the_list .= "\n\t\t\n"; // forwards compatibility as above $the_list .= "\n\t\tslug}\">\n"; } echo $the_list; } } } ?>
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