就業(yè)課程
認(rèn)證課程
企業(yè)課程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。概念性東西。 IP v6中三種傳輸方式 單播 組播 和任播 其中任播的意思就是 1對一組中的一個 也就是離發(fā)送端最近的接收點(diǎn)
12、Which option is a valid IPv6 address? 哪個選項(xiàng)是一個有效的IPv6地址嗎?
A. 2001:0000:130F::099a::12a 雙冒號只能用一次
B. 2002:7654:A1AD:61:81AF:CCC1 6個字段，IPV6 應(yīng)該為8個字段
C. FEC0:ABCD:WXYZ:0067::2A4 明顯錯誤，十六進(jìn)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中每個字段有多少位?
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?
那一層設(shè)備使用硬件地址去確認(rèn)信息?A. physical
B. data link
C. network
D. transport
Answer: B
明顯是MAC地址 在鏈路層概念性東西 不多解釋
15、 Which layer of the OSI reference model uses flow control, sequencing, and acknowledgements to ensure that reliable networking occurs? OSI
中那一層使用流控，序號和ACK 機(jī)制?
A. data link
B. network
C. transport
D. presentation
E. physical
Answer: C
明顯是傳輸層。
