640-802 CCNA Study Guide - Elktech.org

Cisco 640-802 Exam
Answer: A
Explanation:
Poison reverse: When path information becomes invalid, routers will not immediately remove them
from the routing table, but use 16, an inaccessible metric value, to broadcast it out. Although this
increases the size of the routing table, but is helpful for the elimination of routing cycle, it can
immediately remove any loop between adjacent routers.
The purpose of route poisoning is to avoid problems caused by inconsistent updates and to
prevent network loops. According to exhibit, the interfaces went to the down state so the affected
routes were poisoned and removed and an update to the multicast IP address of 224.0.0.9 was
sent on interface Ethernet1.
QUESTION NO: 562
Which two data link protocols are supported by Cisco IOS software for IPv6? (Choose two)
A. PPP
B. FDDI
C. Frame Relay PVC
D. NBMA
E. Frame Relay SVC
Answer: A,C
Explanation:
QUESTION NO: 563
Assuming the default switch configuration, which approach should you use to configure the
extended VLAN range (1006 through 4094) on a Cisco Catalyst 3750 Series switch?
A. Configure the switch to be in VTP client mode.
B. Configure the switch to be in VTP domain mode.
C. Configure the switch to be in VTP transparent mode.
D. Configure the switch to be in VTPv2.
Answer: C
Explanation:
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