To allocate an Internet protocol control block, in_pcballoc() is called.

要分配 Internet 协议控制块，可调用 in_pcballoc()。

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The switch in the tcp_usrreq function calls in_setpeeraddr(), which copies the foreign IP address and foreign port number from the protocol control block and returns these to the server process.

tcp_usrreq 函数中的切换调用 in_setpeeraddr()，后者从协议控制块复制外来 IP 地址和外来端口号，并将其返回到服务器进程。

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CAN-BUS interface adopts protocol control chip SJA1000 plus receiving and sending chip 82c250. Ethernet interface adopts Ethernet controller RTL8019AS as physical transmission media.

CAN总线接口采用协议控制芯片SJA1000，配以收发器82c250。以太网接口采用以太网控制器rtl 8019as作为物理层传输媒介。

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Known as TCP, the Transmission Control Protocol is core to the functioning of the the Internet.

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For example, on Monday Google engineers proposed changes to the Transmission Control Protocol in order to make the Web faster.

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Peter Thermos, chief technology officer of Palindrome Technologies , proved the point onstage: He played snippets of conversations recorded by snooping on VoIP calls, exploiting vulnerability in a common element in VoIP communications known as media gateway control protocol.

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