单选题In dotted decimal notation, what is the equivalent of 11010101 01000010 01111111 11000010?（）A 213.66.127.194B 214.66.128.195C 212.64.143.194D 213.66.111.194

What is the decimal value of the following 32-bit two's complement number?1111 1111 1111 1111 1111 1111 1100

A．-8

B．-4

C．4

D．8

A. 11110011 10101000 01011110 01111100

B. 11110010 10101010 01011110 01111100

C. 11110010 10101000 01011110 01111100

D. 11110010 10101000 01010110 01111100

●What is the decimal value of the binary value 10010？ (70) .

(70) A．18

B．20

C．14

D．15

Centrifugal pumps have what advantage（s）over reciprocating pumps ________．

A.They are less expensive

B.They are smaller for equivalent pumping ability

C.They pump more cargo in less time

D.All of the above

A. Decimal=160, hexadecimal=00

B. Decimal=170, hexadecimal=AA

C. Decimal=180, hexadecimal=BB

D. Decimal=190, hexadecimal=CC

A. IPv6 supports a greater level of security by integrating features that were optional add-ons in IPv4.

B. IPv6 reduces administrative overhead using stateless address autoconfiguration for hosts.

C. IPv6 eliminates the need for private to public NAT using a large address pool.

D. IPv6 provides backward compatibility with IPv4 using the Next Header field.

E. IPv6 represents large IP addresses using dotted decimal notation.

A.6

B.193

C.225

D.241

E.249

What is the decimal value of the binary value 10010？

A．16

B．17

C．18

D．19

What is the decimal value of the following 8-bit two's complement number? 1111 1001

A．-7

B．-3

C．3

D．7