An ATM PVC is configured as atm pvc 1 0 101 aal5snap 256 128 100 . Which three statements describe the traffic management characteristics of this interface?()
AA
BB
CC
DD
EE
下面选项中关于“文件指针”概念的叙述正确的是( )。
A、文件指针就是文件位置指针,表示当前读写数据的位置
B、文件指针是程序中用FILE定义的指针变量
C、文件指针指向文件在计算机中的存储位置
D、把文件指针传给fscanf函数,就可以向文本文件中写入任意的字符
The user SCOTT executes the following command successfully to increase the salary values in one of his sessions: SQL> UPDATE emp SET sal=sal*1.15 WHERE deptno=20; Before SCOTT ends the transaction, user HR who has the privileges on EMP table executes a query to fetch the salary details but finds the old salary values instead of the increased values. Why does HR still see the old data?()
A、because of redo data from redo log file
B、because of data from database buffer cache
C、because of data from a temporary tablespace
D、because of undo data from the undo tablespace
You would like to configure an Ethernet interface with the following characteristics: Fast Which set of configuration commands accurately completes this task?()
A、 A
B、 B
C、 C
D、 D
Which of the following network appliances can BEST be described as allowing multiple servers toshare requests for a website through the same public IP address?()
A、VPN concentrator
B、Content filter
C、Load balancer
D、Proxy server
网络安全事件发生的风险增大时,省级以上人民政府有关部门应当采取哪些措施?