What part of 192.168.10.51 is the Network ID, assuming a default subnet mask?

A. 192
B. 192.168.10
C. 0.0.0.5
D. 51
E. None of the above
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The slowest transmission speeds are those of

A. twisted-pair wire
B. coaxial cable
C. fiber-optic cable
D. microwaves

=====================
What protocol is used between E-Mail servers?

A. FTP B. SMTP
C. SNMP D. POP3
======
Virtual memory is

an extremely large main memory.
an extremely large secondary memory.
-------------an illusion of extremely large main memory.
a type of memory used in super computers.
===
A Gigabyte is equal to

1024 Megabytes
1024 Kilobytes
1024 Terabytes
1024 Bytes