【单选题】( )是由一条正脊、四条垂脊、四条戗脊组成。
【单选题】下面关于 IP V4 数据包格式描述错误的是
B.
IP 包经过路由器时头部校验和字段的字必须重新计算
C.
IP 包中包含源 IP 地址和目的 IP 地址
【单选题】下面关于 IP V4 数据包格式描述错误的是
B.
IP 包经过路由器时头部校验和字段的字必须重新计算
C.
IP 包中包含源 IP 地址和目的 IP 地址
【单选题】Many of us have a vague feeling that things are moving faster. Doctors and executives of ten complain that they can't keep up with the latest developments in their fields. Hardly a meeting or conferen...
A.
Things are moving faster.
B.
Change is out of control.
C.
People react differently to changes.
D.
Young students are ignorant of changes.
【简答题】Never make a ____5_____without asking for one in turn.
【单选题】下面关于目前现网IP地址分配的描述,()是错误的。
A.
网络设备中既有分配公有IP地址,也有分配私有IP地址的
D.
PDSN上分别定义了公有IP地址池及私有IP地址池