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When a TCP entity opens a TCP connection, it creates a Transmission Control Block (:term:`TCB`). The TCB contains the entire state that is maintained by the TCP entity for each TCP connection. During connection establishment, the TCB contains the local IP address, the remote IP address, the local port number, the remote port number, the current local sequence number and the last sequence number received from the remote entity. Until the mid 1990s, TCP implementations had a limit on the number of TCP connections that could be in the `SYN RCVD` state at a given time. Many implementations set this limit to about 100 TCBs. This limit was considered sufficient even for heavily load http servers given the small delay between the reception of a `SYN` segment and the reception of the `ACK` segment that terminates the establishment of the TCP connection. When the limit of 100 TCBs in the `SYN Rcvd` state is reached, the TCP entity discards all received TCP `SYN` segments that do not correspond to an existing TCB.
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| Shortcut | Action |
|---|---|
| ? | Open available keyboard shortcuts. |
| Alt + Home | Navigate to the first translation in the current search. |
| Alt + End | Navigate to the last translation in the current search. |
|
Alt + PageUp or
Ctrl + ↑ or Alt + ↑ or Cmd + ↑ or |
Navigate to the previous translation in the current search. |
|
Alt + PageDown or
Ctrl + ↓ or Alt + ↓ or Cmd + ↓ or |
Navigate to the next translation in the current search. |
|
Ctrl + Enter or
Cmd + Enter |
Submit current form; this works the same as pressing Save and continue while editing translation. |
|
Ctrl + Shift + Enter or
Cmd + Shift +Enter |
Unmark translation as Needing edit and submit it. |
|
Alt + Enter or
Option + Enter |
Submit the string as a suggestion; this works the same as pressing Suggest while editing translation. |
|
Ctrl + E or
Cmd + E |
Focus on translation editor. |
|
Ctrl + U or
Cmd + U |
Focus on comment editor. |
|
Ctrl + M or
Cmd + M |
Shows Automatic suggestions tab. |
|
Ctrl + 1 to
Ctrl + 9 or
Cmd + 1 to Cmd + 9 |
Copies placeable of a given number from source string. |
|
Ctrl + M followed by
1 to 9 or
Cmd + M followed by 1 to 9 |
Copy the machine translation of a given number to current translation. |
|
Ctrl + I followed by
1 to
9 or
Cmd + I followed by 1 to 9 |
Ignore one item in the list of failing checks. |
|
Ctrl + J or
Cmd + J |
Shows the Nearby strings tab. |
|
Ctrl + S or
Cmd + S |
Focus on search field. |
|
Ctrl + O or
Cmd + O |
Copy the source string. |
|
Ctrl + Y or
Cmd + Y |
Toggle the Needs editing checkbox. |
| → | Browse the next translation string. |
| ← | Browse the previous translation string. |
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