就业课程
认证课程
企业课程11、What is known as "one-to-nearest" addressing in IPv6?
A. global unicast
B. anycast
C. multicast
D. unspecified address
Answer: B
考查IPV6 任播地址的考查。概念性东西。 IP v6中三种传输方式 单播 组播 和任播 其中任播的意思就是 1对一组中的一个 也就是离发送端最近的接收点
12、Which option is a valid IPv6 address? 哪个选项是一个有效的IPv6地址吗?
A. 2001:0000:130F::099a::12a 双冒号只能用一次
B. 2002:7654:A1AD:61:81AF:CCC1 6个字段，IPV6 应该为8个字段
C. FEC0:ABCD:WXYZ:0067::2A4 明显错误，十六进制不可能有xyz
D. 2004:1:25A4:886F::1
Answer: D
13、 How many bits are contained in each field of an IPv6 address? IPV6中每个字段有多少位?
A. 24
B. 4
C. 8
D. 16
Answer: D
128除以8=16位
14、 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?
那一层设备使用硬件地址去确认信息?A. physical
B. data link
C. network
D. transport
Answer: B
明显是MAC地址 在链路层概念性东西 不多解释
15、 Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs? OSI
中那一层使用流控，序号和ACK 机制?
A. data link
B. network
C. transport
D. presentation
E. physical
Answer: C
明显是传输层。
