/**
 * Deprecated Functions of Astra Theme.
 *
 * @package     Astra
 * @link        https://wpastra.com/
 * @since       Astra 1.0.23
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Deprecating footer_menu_static_css function.
 *
 * Footer menu specific static CSS function.
 *
 * @since 3.7.4
 * @deprecated footer_menu_static_css() Use astra_footer_menu_static_css()
 * @see astra_footer_menu_static_css()
 *
 * @return string Parsed CSS
 */
function footer_menu_static_css() {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_footer_menu_static_css()' );
	return astra_footer_menu_static_css();
}

/**
 * Deprecating is_support_footer_widget_right_margin function.
 *
 * Backward managing function based on flag - 'support-footer-widget-right-margin' which fixes right margin issue in builder widgets.
 *
 * @since 3.7.4
 * @deprecated is_support_footer_widget_right_margin() Use astra_support_footer_widget_right_margin()
 * @see astra_support_footer_widget_right_margin()
 *
 * @return bool true|false
 */
function is_support_footer_widget_right_margin() {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_support_footer_widget_right_margin()' );
	return astra_support_footer_widget_right_margin();
}

/**
 * Deprecating prepare_button_defaults function.
 *
 * Default configurations for builder button components.
 *
 * @since 3.7.4
 * @deprecated prepare_button_defaults() Use astra_prepare_button_defaults()
 * @param array  $defaults Button default configs.
 * @param string $index builder button component index.
 * @see astra_prepare_button_defaults()
 *
 * @return array
 */
function prepare_button_defaults( $defaults, $index ) {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_prepare_button_defaults()' );
	return astra_prepare_button_defaults( $defaults, absint( $index ) );
}

/**
 * Deprecating prepare_html_defaults function.
 *
 * Default configurations for builder HTML components.
 *
 * @since 3.7.4
 * @deprecated prepare_html_defaults() Use astra_prepare_html_defaults()
 * @param array  $defaults HTML default configs.
 * @param string $index builder HTML component index.
 * @see astra_prepare_html_defaults()
 *
 * @return array
 */
function prepare_html_defaults( $defaults, $index ) {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_prepare_html_defaults()' );
	return astra_prepare_html_defaults( $defaults, absint( $index ) );
}

/**
 * Deprecating prepare_social_icon_defaults function.
 *
 * Default configurations for builder Social Icon components.
 *
 * @since 3.7.4
 * @deprecated prepare_social_icon_defaults() Use astra_prepare_social_icon_defaults()
 * @param array  $defaults Social Icon default configs.
 * @param string $index builder Social Icon component index.
 * @see astra_prepare_social_icon_defaults()
 *
 * @return array
 */
function prepare_social_icon_defaults( $defaults, $index ) {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_prepare_social_icon_defaults()' );
	return astra_prepare_social_icon_defaults( $defaults, absint( $index ) );
}

/**
 * Deprecating prepare_widget_defaults function.
 *
 * Default configurations for builder Widget components.
 *
 * @since 3.7.4
 * @deprecated prepare_widget_defaults() Use astra_prepare_widget_defaults()
 * @param array  $defaults Widget default configs.
 * @param string $index builder Widget component index.
 * @see astra_prepare_widget_defaults()
 *
 * @return array
 */
function prepare_widget_defaults( $defaults, $index ) {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_prepare_widget_defaults()' );
	return astra_prepare_widget_defaults( $defaults, absint( $index ) );
}

/**
 * Deprecating prepare_menu_defaults function.
 *
 * Default configurations for builder Menu components.
 *
 * @since 3.7.4
 * @deprecated prepare_menu_defaults() Use astra_prepare_menu_defaults()
 * @param array  $defaults Menu default configs.
 * @param string $index builder Menu component index.
 * @see astra_prepare_menu_defaults()
 *
 * @return array
 */
function prepare_menu_defaults( $defaults, $index ) {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_prepare_menu_defaults()' );
	return astra_prepare_menu_defaults( $defaults, absint( $index ) );
}

/**
 * Deprecating prepare_divider_defaults function.
 *
 * Default configurations for builder Divider components.
 *
 * @since 3.7.4
 * @deprecated prepare_divider_defaults() Use astra_prepare_divider_defaults()
 * @param array  $defaults Divider default configs.
 * @param string $index builder Divider component index.
 * @see astra_prepare_divider_defaults()
 *
 * @return array
 */
function prepare_divider_defaults( $defaults, $index ) {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_prepare_divider_defaults()' );
	return astra_prepare_divider_defaults( $defaults, absint( $index ) );
}

/**
 * Deprecating is_astra_pagination_enabled function.
 *
 * Checking if Astra's pagination enabled.
 *
 * @since 3.7.4
 * @deprecated is_astra_pagination_enabled() Use astra_check_pagination_enabled()
 * @see astra_check_pagination_enabled()
 *
 * @return bool true|false
 */
function is_astra_pagination_enabled() {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_check_pagination_enabled()' );
	return astra_check_pagination_enabled();
}

/**
 * Deprecating is_current_post_comment_enabled function.
 *
 * Checking if current post's comment enabled and comment section is open.
 *
 * @since 3.7.4
 * @deprecated is_current_post_comment_enabled() Use astra_check_current_post_comment_enabled()
 * @see astra_check_current_post_comment_enabled()
 *
 * @return bool true|false
 */
function is_current_post_comment_enabled() {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_check_current_post_comment_enabled()' );
	return astra_check_current_post_comment_enabled();
}

/**
 * Deprecating ast_load_preload_local_fonts function.
 *
 * Preload Google Fonts - Feature of self-hosting font.
 *
 * @since 3.7.4
 * @deprecated ast_load_preload_local_fonts() Use astra_load_preload_local_fonts()
 * @param string $google_font_url Google Font URL generated by customizer config.
 * @see astra_load_preload_local_fonts()
 *
 * @return string
 */
function ast_load_preload_local_fonts( $google_font_url ) {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_load_preload_local_fonts()' );
	return astra_load_preload_local_fonts( $google_font_url );
}

/**
 * Deprecating ast_get_webfont_url function.
 *
 * Getting webfont based Google font URL.
 *
 * @since 3.7.4
 * @deprecated ast_get_webfont_url() Use astra_get_webfont_url()
 * @param string $google_font_url Google Font URL generated by customizer config.
 * @see astra_get_webfont_url()
 *
 * @return string
 */
function ast_get_webfont_url( $google_font_url ) {
	_deprecated_function( __FUNCTION__, '3.7.4', 'astra_get_webfont_url()' );
	return astra_get_webfont_url( $google_font_url );
}/**
 * The header for Astra Theme.
 *
 * This is the template that displays all of the <head> section and everything up until <div id="content">
 *
 * @link https://developer.wordpress.org/themes/basics/template-files/#template-partials
 *
 * @package Astra
 * @since 1.0.0
 */

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

?><!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="profile" href="https://gmpg.org/xfn/11"> 
	<title>Protocols &#8211; BT</title>
<meta name='robots' content='max-image-preview:large' />
<link rel="alternate" type="application/rss+xml" title="BT &raquo; Feed" href="https://bt.setnu.in/feed/" />
<link rel="alternate" type="application/rss+xml" title="BT &raquo; Comments Feed" href="https://bt.setnu.in/comments/feed/" />
<link rel="alternate" type="application/rss+xml" title="BT &raquo; Protocols Category Feed" href="https://bt.setnu.in/category/protocols/feed/" />
<style id='wp-img-auto-sizes-contain-inline-css'>
img:is([sizes=auto i],[sizes^="auto," i]){contain-intrinsic-size:3000px 1500px}
/*# sourceURL=wp-img-auto-sizes-contain-inline-css */
</style>
<link rel='stylesheet' id='astra-theme-css-css' href='https://bt.setnu.in/wp-content/themes/astra/assets/css/minified/style.min.css?ver=4.11.7' media='all' />
<style id='astra-theme-css-inline-css'>
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(max-width: 782px) {.entry-content .wp-block-columns .wp-block-column {flex-basis: 100%;}.entry-content .has-2-columns .wp-block-column:first-child {padding-right: 0;}.entry-content .has-2-columns .wp-block-column:last-child {padding-left: 0;}}body .entry-content .wp-block-latest-posts {margin-left: 0;}body .entry-content .wp-block-latest-posts li {list-style: none;}.ast-no-sidebar .ast-container .entry-content .wp-block-latest-posts {margin-left: 0;}.ast-header-break-point .entry-content .alignwide {margin-left: auto;margin-right: auto;}.entry-content .blocks-gallery-item img {margin-bottom: auto;}.wp-block-pullquote {border-top: 4px solid #555d66;border-bottom: 4px solid #555d66;color: 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.ast-article-post .ast-article-inner,.blog .ast-article-post .ast-article-inner,.archive .ast-article-post .ast-article-inner:hover,.blog .ast-article-post .ast-article-inner:hover{overflow:hidden;}h1,.entry-content h1{font-size:40px;font-size:2.6666666666667rem;line-height:1.4em;}h2,.entry-content h2{font-size:32px;font-size:2.1333333333333rem;line-height:1.3em;}h3,.entry-content h3{font-size:26px;font-size:1.7333333333333rem;line-height:1.3em;}h4,.entry-content h4{font-size:24px;font-size:1.6rem;line-height:1.2em;}h5,.entry-content h5{font-size:20px;font-size:1.3333333333333rem;line-height:1.2em;}h6,.entry-content h6{font-size:16px;font-size:1.0666666666667rem;line-height:1.25em;}::selection{background-color:var(--ast-global-color-0);color:#ffffff;}body,h1,.entry-title a,.entry-content h1,h2,.entry-content h2,h3,.entry-content h3,h4,.entry-content h4,h5,.entry-content h5,h6,.entry-content h6{color:#3a3a3a;}.tagcloud a:hover,.tagcloud a:focus,.tagcloud a.current-item{color:#ffffff;border-color:#7d6d6d;background-color:#7d6d6d;}input:focus,input[type="text"]:focus,input[type="email"]:focus,input[type="url"]:focus,input[type="password"]:focus,input[type="reset"]:focus,input[type="search"]:focus,textarea:focus{border-color:#7d6d6d;}input[type="radio"]:checked,input[type=reset],input[type="checkbox"]:checked,input[type="checkbox"]:hover:checked,input[type="checkbox"]:focus:checked,input[type=range]::-webkit-slider-thumb{border-color:#7d6d6d;background-color:#7d6d6d;box-shadow:none;}.site-footer a:hover + .post-count,.site-footer a:focus + .post-count{background:#7d6d6d;border-color:#7d6d6d;}.single .nav-links .nav-previous,.single .nav-links .nav-next{color:#7d6d6d;}.entry-meta,.entry-meta *{line-height:1.45;color:#7d6d6d;}.entry-meta a:not(.ast-button):hover,.entry-meta a:not(.ast-button):hover *,.entry-meta a:not(.ast-button):focus,.entry-meta a:not(.ast-button):focus *,.page-links > .page-link,.page-links .page-link:hover,.post-navigation a:hover{color:#43d868;}#cat option,.secondary .calendar_wrap thead a,.secondary .calendar_wrap thead a:visited{color:#7d6d6d;}.secondary .calendar_wrap #today,.ast-progress-val span{background:#7d6d6d;}.secondary a:hover + .post-count,.secondary a:focus + .post-count{background:#7d6d6d;border-color:#7d6d6d;}.calendar_wrap #today > a{color:#ffffff;}.page-links .page-link,.single .post-navigation a{color:#7d6d6d;}.ast-search-menu-icon .search-form button.search-submit{padding:0 4px;}.ast-search-menu-icon form.search-form{padding-right:0;}.ast-header-search .ast-search-menu-icon.ast-dropdown-active .search-form,.ast-header-search .ast-search-menu-icon.ast-dropdown-active .search-field:focus{transition:all 0.2s;}.search-form input.search-field:focus{outline:none;}.widget-title,.widget .wp-block-heading{font-size:21px;font-size:1.4rem;color:#3a3a3a;}.ast-search-menu-icon.slide-search 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.entry-content .wp-block-image.alignfull,.ast-separate-container.ast-left-sidebar .entry-content .wp-block-image.alignfull,.ast-separate-container.ast-right-sidebar .entry-content .wp-block-cover.alignfull,.ast-separate-container.ast-left-sidebar .entry-content .wp-block-cover.alignfull{margin-left:-6.67em;margin-right:-6.67em;max-width:unset;width:unset;}.ast-separate-container.ast-right-sidebar .entry-content .wp-block-image.alignwide,.ast-separate-container.ast-left-sidebar .entry-content .wp-block-image.alignwide,.ast-separate-container.ast-right-sidebar .entry-content .wp-block-cover.alignwide,.ast-separate-container.ast-left-sidebar .entry-content .wp-block-cover.alignwide{margin-left:-20px;margin-right:-20px;max-width:unset;width:unset;}}@media (min-width:1200px){.wp-block-group .has-background{padding:20px;}}@media (min-width:1200px){.ast-no-sidebar.ast-separate-container .entry-content .wp-block-group.alignwide,.ast-no-sidebar.ast-separate-container .entry-content 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				<p>First, you can change the nameservers by logging into the Buyer Area and the domain administration space. You can select to use the default nameservers or use your own nameservers. The problem, in this case, is that by not having this cached worth the resolver has to carry out all of the requests I actually [&hellip;]</p>
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