Mr. Musk said the service would use second-generation Starlink satellites that would be outfitted with large antennas that cover swaths of land that have no service. SpaceX has a pending application before the FCC to launch around 30,000 of the second-generation satellites over time.
The service won’t require mobile users to get a new phone. Musk said in or after a natural disaster, even if all the cell towers are taken out, the planned service should work.
不過可以預期只會有很基本的服務 (大概確保通話與簡訊會通),針對緊急危難狀況會特別有幫助:
Mr. Musk said that the bandwidth would be limited and that the new satellite service wouldn’t supplant existing ground-based cellular services. “This is meant to provide basic coverage to areas that are completely dead,” he said.
Focus on what's mission-critical: Removal of free dynos, hobby-dev Heroku Postgres and hobby-dev Heroku Data for Redis plans starting November 28, 2022 and inactive account deletion starting October 26, 2022.
取而代之的是針對特定團體條件性的開放,分成三類:學生、非營利組織以及 open source 專案。但前兩個目前方案都還沒出來,要晚點才會公佈;後面的 open source 專案則是要寄信申請。
A client MAY attempt access to a resource with an "https" URI by resolving the host identifier to an IP address, establishing a QUIC connection to that address on the indicated port (including validation of the server certificate as described above), and sending an HTTP/3 request message targeting the URI to the server over that secured connection. Unless some other mechanism is used to select HTTP/3, the token "h3" is used in the Application-Layer Protocol Negotiation (ALPN; see [RFC7301]) extension during the TLS handshake.
Connectivity problems (e.g., blocking UDP) can result in a failure to establish a QUIC connection; clients SHOULD attempt to use TCP-based versions of HTTP in this case.
另外一條路是在 TCP 連線時透過 HTTP header 告訴瀏覽器升級:
An HTTP origin can advertise the availability of an equivalent HTTP/3 endpoint via the Alt-Svc HTTP response header field or the HTTP/2 ALTSVC frame ([ALTSVC]) using the "h3" ALPN token.
像是這樣:
Alt-Svc: h3=":50781"
然後 client 就可以跑上 HTTP/3:
On receipt of an Alt-Svc record indicating HTTP/3 support, a client MAY attempt to establish a QUIC connection to the indicated host and port; if this connection is successful, the client can send HTTP requests using the mapping described in this document.
Q. Is there a separate charge for enabling HTTP/3?
No, there is no separate charge for enabling HTTP/3 on Amazon CloudFront distributions. HTTP/3 requests will be charged at the request pricing rates as per your pricing plan.
This means that two or more Linodes connected via the VLAN can see each other as if they were directly connected to the same physical Ethernet network. This network supports all the logical Ethernet features like L2 broadcast and L2 multicast.