Which IP address can be assigned to an Internet interface?（）

单项选择题What is the principle reason to use a private IP address on an internal network?（）

A. Subnet strategy for private companies.
B. Manage and scale the growth of the internal network.
C. Conserve public IP addresses so that we do not run out of them.
D. Allow access reserved to the devices.

单项选择题Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs?（）

A. data link
B. network
C. transport
D. presentation
E. physical

单项选择题Which layer of the OSI reference model uses the hardware address of a device to ensure message delivery to the proper host on a LAN?（）

A. physical
B. data link
C. network
D. transport

单项选择题Which option is a valid IPv6 address?（）

A. 2001:0000:130F::099a::12a
B. 2002:7654:A1AD:61:81AF:CCC1
C. FEC0:ABCD:WXYZ:0067::2A4
D. 2004:1:25A4:886F::1

单项选择题What is known as one-to-nearest addressing in IPv6?（）

A. global unicast
B. anycast
C. multicast
D. unspecified address