370和371问题

nxdxy

QUESTION 370
Which technology supports the stateless assignment of IPv6 addresses?
A. DNS
B. DHCPv6
C. DHCP
D. autoconfiguration

QUESTION 371
Which WAN topology is most appropriate for a centrally located server farm with several satellite
branches?
A. star
B. hub and spoke
C. point-to-point
D. full mesh

370答案给的是bd，考试时选哪个？
371为什么不是star

五三多

371， hub and spoke
这里的hub 和 spoke是这两个词的原意，都是轮子的配件；
hub不是集线器，是轮毂，就是包住轮轴的那个东西；spoke是辐条，不是speak的过去式。
hub and spoke 意指一个强大的中心向外辐射这样的结构。

Shalltear

The Single Hub and Spoke is arguably the extreme of the partial mesh topology (it would also†become a†star topology), where all nodes connect only to a single hub site. All communication between spoke sites must be via the hub. The main problem with this topology is lack of resilience if the hub site goes down.
The star topology is where all nodes connect back to a central node. It’s common†in the LAN environment, for instance where PCs connect back to an access switch.
感觉hub and spoke 可以是 star+mesh的结合 更完美..