Category: Web & Network

HTTP/2 vs SPDY 3.1

I have a web site, which was powered by Nginx 1.7. The SPDY 3.1 was enabled. Later last week, I upgraded it to Nginx 1.9.7 mainline version. HTTP/2 already built with Nginx from version 1.9.5.  Why not enable HTTP/2? I just did a very rough test.   1. Pingdom testing tool SPDY 3.1: Performance Grade

Wifi Standard 802.11ac

802.11ac is main stream as well as 802.11n. Because 802.11n has better distance and more power to pass-through wall. But 802.11ac is much fast than 802.11n. 802.11ac Technology Overview: 11n Specification: 2.4 and 5Ghz  Supported Wider channels 40MHz Better modulation 64QAM Additional streams up to 4 streams Beam forming Backwards compatibility, with 11a/b/g 11ac introduces:

Fix some Crawl errors of my blog

I found some errors in Google Search Console —  Crawl Error. More than 400 errors of Not-Found. After checking the details of these errors, I am noticed that they are the dead links which were brought after I converted this blog from MovableType to WordPress. Some links are changed and I forgot to implement the

Server Name Indication (SNI)

Server Name Indication is an extension to the TLS computer networking protocol by which a client indicates which hostname it is attempting to connect to at the start of the handshaking process. The most import reason to have this extension is to allow a server to present multiple SSL web site, or multiple certificates on

Linode has a security updates

Received an email from Linode about the security updates. It happened on yesterday. The Email said: Linode recently received several Xen Security Advisories (XSAs) that require us to perform updates to our host servers. In order to apply the updates, hosts and the Linodes running on them must be rebooted. The XSAs will be publicly