Table of Contents
- 1 What is the meaning of keep alive?
- 2 How does keep alive work?
- 3 What is keep-alive in Apache?
- 4 What’s another word for keep-alive?
- 5 What is TCP Keep-Alive in Wireshark?
- 6 What is keep alive timeout nginx?
- 7 When do you need to use a keep alive device?
- 8 What does the keep alive instruction in http mean?
What is the meaning of keep alive?
HTTP keep-alive, a.k.a., HTTP persistent connection, is an instruction that allows a single TCP connection to remain open for multiple HTTP requests/responses. By default, HTTP connections close after each request. Keep-alive also reduces both CPU and memory usage on your server.
How does keep alive work?
A keep-alive allows an existing TCP connection to be re-used for multiple requests/responses, thus avoiding all of that overhead. That is what makes the connection “persistent”. In HTTP 0.9 and 1.0, by default the server closes its end of a TCP connection after sending a response to a client.
What is socket keep alive?
The SO_KEEPALIVE option for a socket is disabled (set to FALSE) by default. When this socket option is enabled, the TCP stack sends keep-alive packets when no data or acknowledgement packets have been received for the connection within an interval.
What does TCP keep alive do?
The TCP Keepalive Timer feature provides a mechanism to identify dead connections. When a TCP connection on a routing device is idle for too long, the device sends a TCP keepalive packet to the peer with only the Acknowledgment (ACK) flag turned on.
What is keep-alive in Apache?
The keepalive timeout is a timer that counts down, and is reset every time the web browser asks for a new item. So long as the browser keeps asking for more things, the timeout will not expire, even with a keepalive timout setting of 1 second. However, the default setting for Apache Keepalive Timeout is 15 seconds.
What’s another word for keep-alive?
What is another word for keep alive?
What is keep alive in Apache?
What is TCP keep alive in Wireshark?
A TCP Keep-Alive is sent with a Seq No one less than the sequence number the receiver is expecting. Because the receiver has already ACKd the Seq No of the Keep-Alive (because that Seq No was in the range of an earlier segment), it just ACKs it again and discards the segment (packet).
What is TCP Keep-Alive in Wireshark?
What is keep alive timeout nginx?
From the description of keepalive_timeout: “sets a timeout during which a keep-alive client connection will stay open on the server side.” So its possible that the keepalive connection stayed open longer on NGINX if you configured keepalive_timeout.
What do you mean by nourished?
: to provide (someone or something) with food and other things that are needed to live, be healthy, etc. : to cause (something) to develop or grow stronger. See the full definition for nourish in the English Language Learners Dictionary.
What do you mean by Cradle?
To cradle is to hold delicately and gently, like how you would hold an infant. The word cradle comes to us from the Old English word cradol, which meant “little bed or cot.” And while it is important to cradle a baby’s head when you pick them up out of their cradle, this word isn’t all baby talk.
When do you need to use a keep alive device?
“Keep-alive” devices are used in automotive repair to maintain battery voltage for devices in the vehicle when the battery is disconnected or changed, usually by plugging in a small battery to the vehicle’s 12 volt power outlet.
What does the keep alive instruction in http mean?
HTTP keep-alive, a.k.a., HTTP persistent connection, is an instruction that allows a single TCP connection to remain open for multiple HTTP requests/responses. By default, HTTP connections close after each request.
How does keep alive work on a server?
Keep-alive also reduces both CPU and memory usage on your server. In the event that keep-alive is not enabled on your server, it can be turned on by adding the following code to your .htaccess file:
When did keep alive train control system come out?
Ever since its unveiling in late 2012, “Keep Alive®” has become a household name. Often imitated, but never equaled! Keep Alive® technology eliminates issues which arise from poor track conditions and/or poor electrical pickups.