在相隔2000km的两地间通过电缆以4800b/s的速率传送3000比特长的数据包,从开始发送到接收完数据需要的时间是 (13) ,
A. 480ms
B. 645ms
C. 630ms
D. 635ms
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TCP协议在建立连接的过程中可能处于不同的状态,用netstat命令显示出TCP连接的状态为SYN_SEND,则这个连接正处于 (20) 。
A. 监听对方的建立连接请求
B. 已主动发出连接建立请求
C. 等待对方的连接释放请求
D. 收到对方的连接建立请求
某单位局域网配置如下图所示,PC2发送到Internet上的报文源IP地址为(66)。
A. 192.168.0.2
B. 192.168.0.1
C. 202.117.112.1
D. 202.117.112.2
Requirements management is the process of (73 ),analyzing, tracing,prioritizing and agreeing on requirements and then controlling changes and communicating to relevant stakeholders. It is a (74 ) process throughout a project. A requirement is a capability to which a project outcome (product or service) should conform.
A. communicating
B. collecting
C. filing
D. documenting
A.U1B.U2C.U1或U2D.不可到达
A. U1
B. U2
C. U1或U2
D. 不可到达