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[已解决] 求高人赐教

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发表于 2012-1-11 17:57:37 | 显示全部楼层 |阅读模式
813题库151题的,PDF上VRRP题目答案错了,应该是A吧,regain是重新获得,maintain是保持
A. Router A is the master virtual router, and Router B is the backup virtual router. When Router A fails,
Router B will become the master virtual router. When Router A recovers, Router B will maintain the role
of master virtual router.
B. Router B is the master virtual router, and Router A is the backup virtual router. When Router B fails,
Router A will become the master virtual router. When Router B recovers, it will regain the master virtual
router role.
C. Router A is the master virtual router, and Router B is the backup virtual router. When Router A fails,
Router B will become the master virtual router. When Router A recovers, it will regain the master virtual
router role.
D. Router B is the master virtual router, and Router A is the backup virtual router. When Router B fails,
Router A will become the master virtual router. When Router B recovers, Router A will maintain the role
of master virtual router.
Answer: C
Section: HSRP, VRRP, GLBP
Explanation/Reference:
A的priority比较高,故A为active,但由于没有配置preempt,故当A fail后 B成为active,然后A也起来后,B
还是active。

还有158题目中也不是很理解
A. multipoint control unit (MCU) Catalyst_A.
B. Hosts using the default gateway address of 192.168.1.1 will have their traffic sent to 192.168.1.11 even
after Catalyst_A becomes available again.
C. Hosts using the default gateway address of 192.168.1.2 will have their traffic sent to Catalyst_A.
D. Catalyst_A is load sharing traffic in VLAN 50.
Answer: AC
Section: HSRP, VRRP, GLBP
Explanation/Reference:
虚拟IP为192.168.1.2。
而且他在VLAN50中配置了两个HSRP组,实现load sharing
解释和选项不搭啊,中文解释意思是说选AD,而题目选了AC,莫非C选项中网关指向和数据流向体现了load sharing

 楼主| 发表于 2012-1-11 22:23:30 | 显示全部楼层
受教
沙发 2012-1-11 22:23:30 回复 收起回复
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 楼主| 发表于 2012-1-11 22:36:43 | 显示全部楼层

Refer to the exhibit. Which two statements are true about the output from the show standby vlan 50
command? (Choose two.)
A. multipoint control unit (MCU) Catalyst_A.
B. Hosts using the default gateway address of 192.168.1.1 will have their traffic sent to 192.168.1.11 even
after Catalyst_A becomes available again.
C. Hosts using the default gateway address of 192.168.1.2 will have their traffic sent to Catalyst_A.
D. Catalyst_A is load sharing traffic in VLAN 50.
Answer: AC
Section: HSRP, VRRP, GLBP
Explanation/Reference:
虚拟IP为192.168.1.2。
而且他在VLAN50中配置了两个HSRP组,实现load sharing。
未命名.jpg
2.jpg
板凳 2012-1-11 22:36:43 回复 收起回复
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发表于 2012-5-15 16:12:41 | 显示全部楼层
应该是题目答案有误,从图看起来只有选项D是正确的,选项C不多,图明显说明白了是虚拟网关192.168.1.2的备用,standby router is local,所有数据不会流向Catalyst_A.
QQ截图20120515160903.png
地板 2012-5-15 16:12:41 回复 收起回复
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发表于 2012-5-15 18:36:45 | 显示全部楼层
C. Router A is the master virtual router, and Router B is the backup virtual router. When Router A fails,
Router B will become the master virtual router. When Router A recovers, it will regain the master virtual
router role.

正确,VRRP虽然没配置preempt,但是默认了抢占功能。HSRP不默认。


D. Catalyst_A is load sharing traffic in VLAN 50.正确,另一项有几个版本选项不同,楼上这个版本比较靠谱。
5# 2012-5-15 18:36:45 回复 收起回复
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