Find the curl for the vector field at the given point. 
Definitions:
TCP
Transmission Control Protocol, a fundamental protocol in the Internet protocol suite that enables reliable, ordered, and error-checked delivery of a stream of bytes between applications running on hosts communicating via an IP network.
Three-way Handshake
A method used in a TCP/IP network to establish a connection between a client and a server that involves three steps: the initiation of the connection by the client, the acknowledgment by the server, and the acknowledgment of the acknowledgment by the client.
POP
Post Office Protocol, a standard protocol used by local email clients to retrieve emails from a remote server over an IP network.
Post Office Protocol
An internet standard protocol used by local email clients to retrieve emails from a remote server over a TCP/IP connection.
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