求助 NP 交换题库 拖图题 第7、8题答案矛盾

贝少芬

如图，左边是拖图题第7题的答案，右边是拖图题第8题的答案。“Leverages on stp”一个属于端到端VLAN的特性，一个属于本地VLAN的特性。这是怎么回事？

独钓寒江

贝少芬

搜了半天没找到什么官方资料，只搜到一个人的发帖。按照这个人的说法，第8题的答案是正确的。
Local VLANs
-20/80 rules, becouse must of ur applications are in another subnet so  20% of ur traffic is local and 80% of ur traffic is remote
-Leverages on routing, traffic passes from one subnet to an other
-Locally significant, a vlan number never cross beyond the distribution switch.
-Leverages on spanning-tree (vtp is no necessary since u will be  configuring the access and distribution switch with the same vlan at  must).

End to End VLANs
-80/20 rules, example u are connecting 2 sans from different buildings  and must see each other in the same vlan and expect to have 80% of  traffic local
-Leverages on switching, traffic passes from one switch to another in the same broadcast domain
-Globally significant, vlan traffic passes over multiple trunks and vlan propagates among multiple switches
-Leverages on VTP, its a requisite to avoid configuring vlans among mutiple switches.

贝少芬

请问论坛管理员，您是如何看出来这个问题“已解决”了？

renn1106

local VLAN中同一VLAN ID的VLAN只存在一台交换机中，把一台交换机中的端口划分为多个VLAN，通常交换机 VTP transparent
特点：
2层通信 比 3层通信为 20/80
本地不独立需要依靠3层进行本地不同VLAN间的通信
需要依靠路由进行通信。
end to end VLAN
同个VLAN 存在多个交换机上，VTP Client ,Server 模式
特点：
2层通信比3层通信为80/20
本地独立：VLAN间的通信依靠Trunk就能完成
通常使用VTP保持不同交换机上的VLAN信息相同

STP   在local vlan和end to end vlan 都会用到