段不是T C P报头的一部分)?
A. Subnet mask B. Sequence number
C. Data offset D. Destination port
32) What is the sequence number in a TCP header used for (在T C P报头中的顺序号的作用是什么)?
A. Acknowledgments
B. Reordering of the octets received
C. Rejecting duplicate octets
33) Variable sliding windows provide an explicit mechanism for notifying TCP if an intermediate node (for example, a router) becomes congested (在中间节点,例如一个路由器拥塞的情况下,可变滑动窗口提供了通知T C P的显式机制)。
A. True B. False