640-802 CCNA Study Guide - Elktech.org

Cisco 640-802 Exam
802.1D IEEE algorithm by exchanging BPDU messages with other switches to detect loops, and
then removes the loop by shutting down selected bridge interfaces. This algorithm guarantees that
there is one and only one active path between two network devices.
QUESTION NO: 426
What information does a router running a link-state protocol use to build and maintain its
topological database? (Choose two.)
A. hello packets
B. SAP messages sent by other routers
C. LSAs from other routers
D. beacons received on point-to-point links
E. routing tables received from other link-state routers
F. TTL packets from designated routers
Answer: A,C
Explanation:
QUESTION NO: 427
Which statements describe the routing protocol OSPF? (Choose three.)
A. It supports VLSM.
B. It is used to route between autonomous systems.
C. It confines network instability to one area of the network.
D. It increases routing overhead on the network.
E. It allows extensive control of routing updates.
F. It is simpler to configure than RIP v2.
Answer: A,C,E
Explanation:
QUESTION NO: 428
Which protocol reduces administrative overhead in a switched network by allowing the
configuration of a new VLAN to be distributed to all the switches in a domain?
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