Each machine supporting TCP has a TCP transport entity, either a library procedure, a user process, or part of the kernel. In all case, it manages TCP streams and (71) to the IP layer. A TCP (72) accepts user data streams from local process, breaks them into pieces not exceeding 64KB, and sends each piece as a separate IP (73). When datagrams containing TCP data arrive at a machine, they are given to the TCP entity, which reconstructs the original byte streams.The IP layer gives no guarantee that datagrams will be delivered properly, so it is up to TCP to time out and (74) them as need be. Datagmms do arrive may well do so in the wrong order, it is also up to TCP to (75) them into messages in the proper sequence.
A.calls
B.interfaces
C.links
D.produces
第1题:
主动方式FTP服务器要使用的端口包括()。
A.TCP21TCP20
B.TCP21TCP大于1024的端口
C.TCP20、TCP大于1024端口
D.都不对
第2题:
在Internet上用TCP/IP播放视频,想用OSI模型Transport层的最快协议,以保证没有延迟,要使用__(59)__。
A.TCP协议的低开销特性
B.UDP协议的低开销特性
C.TCP协议的高开销特性
D.UDP协议的高开销特性
第3题:
第4题:
在Internet上用TCP/IP播放视频,想用OSI模型Transport层的最快协议,以保证没有延迟,要使用(55)。
A.UDP协议的低开销特性
B.TCP协议的高开销特性
C.UDP协议的高开销特性
D.TCP协议的低开销特性
第5题:
第6题:
下列属于工具TCP定义方法的是()
A.TCP和Z,X
B.TCP和Y,X
C.TCP和Z,Y
D.TCP和Z