Select the two correctstatements from the list below that describe DES and 3DES： （）A、 3DES is muchmore secure than DES.B、 Both DES and 3DES are stream ciphers.C、 DES uses 64 bitkeys， although the effective key lengthis only 56bits.D、 The decryption operat

题目

Select the two correctstatements from the list below that describe DES and 3DES： （）

  • A、 3DES is muchmore secure than DES.
  • B、 Both DES and 3DES are stream ciphers.
  • C、 DES uses 64 bitkeys， although the effective key lengthis only 56bits.
  • D、 The decryption operation for both DES and 3DES is the same as the encryption operation.
  • E、 DES can only be used for encryption， whereas 3DES can also be used for authentication.
相似考题

1.Which two of the addresses below are available for host addresses on the Ezonexam subnet 192.168.15.19/28? (Select two answer choices)A. 192.168.15.17B. 192.168.15.14C. 192.168.15.29D. 192.168.15.16E. 192.168.15.31F. None of the above

2.Which two statements complete a transaction? （）A、DELETE employees;B、DESCRIBE employees;C、ROLLBACK TO SAVEPOINT C;D、GRANT SELECT ON employees TO SCOTT;E、ALTER TABLE employees SET UNUSED COLUMN sal;F、SELECT MAX(sal) FROM employees WHERE department_id = 20;

3.Which two statements about views are true? （）A、A view can be created as read only.B、A view can be created as a join on two or more tables.C、A view cannot have an ORDER BY clause in the SELECT statement.D、A view cannot be created with a GROUP BY clause in the SELECT statement.E、A view must have aliases defined for the column names in the SELECT statement.

4.Which two statements complete a transaction?（）A、DELETE employees;B、DESCRIBE employees;C、ROLLBACK TO SAVE POINT C;D、GRANT SELECT ON employees TO SCOTHE、ALTER TABLE employees SET UNUSED COLUMN sal;F、Select MAX(sal) FROM employees WHERE department _ id 20;

更多“Select the two ”相关问题

  • 第1题：

    Which of the following network topologies BEST describes a VPN? （）(Select TWO)

    • A、Point to Point
    • B、Point to Multipoint
    • C、VLAN
    • D、Ring
    • E、Bus

    正确答案:A,B

  • 第2题：

    Which of the following commands provides similar information about the current configuration ofactive local Ethernet adapters? (Select TWO)（）

    • A、traceroute
    • B、ipconfig
    • C、ifconfig
    • D、route
    • E、hostname

    正确答案:B,C

  • 第3题：

    Which of the following ports are used by default for web servers? （）(Select TWO)

    • A、80
    • B、110
    • C、123
    • D、143
    • E、443

    正确答案:A,E

  • 第4题：

    Which of the following are common VPN transports? (Select TWO)（）

    • A、RDP
    • B、VNC
    • C、SSL
    • D、PPTP
    • E、RAS

    正确答案:A,C

  • 第5题：

    多选题
    Which two chart base types can you select using the Chart Wizard?（）
    A

    Line

    B

    Column

    C

    Bubble

    D

    Flowchart

    E

    OHLC candle stock


    正确答案： B,D
    解析： 暂无解析

  • 第6题：

    多选题
    Which two statements about views are true?（）
    A

    A view can be created as read only.

    B

    A view can be created as a join on two or more tables.

    C

    A view cannot have an ORDER BY clause in the SELECT statement.

    D

    A view cannot be created with a GROUP BY clause in the SELECT statement.

    E

    A view must have aliases defined for the column names in the SELECT statement.


    正确答案： D,E
    解析： 暂无解析

  • 第7题：

    多选题
    PPTP is a combination of which of the following protocols? (Select TWO).（）
    A

    PPP

    B

    TCP/IP

    C

    TCP

    D

    POP3

    E

    PPPoE


    正确答案： D,C
    解析： 暂无解析

  • 第8题：

    Which of the following are encrypted protocols? （）(Select TWO).

    • A、TELNET
    • B、SSH
    • C、POP3
    • D、FTP
    • E、HTTPS

    正确答案:B,E

  • 第9题：

    Which of the following multimeter settings should only be used when there is no electrical flow through the part being tested? （）(Select TWO).

    • A、Ampere
    • B、Continuity
    • C、Volt
    • D、Resistance
    • E、Wattage

    正确答案:B,D

  • 第10题：

    Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary, hire_date FROM EMPLOYEES ORDER BY 2 DESC; What is true about them?（）

    • A、The two statements produce identical results.
    • B、The second statement returns a syntax error.
    • C、There is no need to specify DESC because the results are sorted in descending order by default.
    • D、The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.

    正确答案:A

  • 第11题：

    多选题
    Which of the following commands provides similar information about the current configuration ofactive local Ethernet adapters? (Select TWO)（）
    A

    traceroute

    B

    ipconfig

    C

    ifconfig

    D

    route

    E

    hostname


    正确答案： E,A
    解析： 暂无解析

  • 第12题：

    单选题
    Evaluate these two SQL statements: SELECT last_name, salary , hire_date FROM EMPLOYEES ORDER BY salary DESC; SELECT last_name, salary , hire_date FROM EMPLOYEESORDER BY 2 DESC; What is true about them?（）
    A

    The two statements produce identical results.

    B

    The second statement returns a syntax error.

    C

    There is no need to specify DESC because the results are sorted in descending order by default.

    D

    The two statements can be made to produce identical results by adding a column alias for the salary column in the second SQL statement.


    正确答案： A
    解析： 暂无解析

  • 第13题：

    多选题
    Which of the following are encrypted protocols? （）(Select TWO).
    A

    TELNET

    B

    SSH

    C

    POP3

    D

    FTP

    E

    HTTPS


    正确答案： A,E
    解析： 暂无解析

  • 第14题：

    多选题
    Which of the following are common VPN transports? (Select TWO)（）
    A

    RDP

    B

    VNC

    C

    SSL

    D

    PPTP

    E

    RAS


    正确答案： B,C
    解析： 暂无解析

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