A. R3 is an ABR.
B. R3 is not connec ted to the backbone.
C. R3 has four neighbors.
D. R3 is the DR for area 2.
第1题：
What can we learn about the Mayan calendar?
A． It was based on the European calendars.
B． It was better than European calendars.
C． It was as accurate as European calendars.
D． It was copied by European calendars.
第2题：
A.We would condult our lawyer
B.The case is difficult
C.I don't care about it
第3题：
What can we conclude from the text?
A Most people believe we think in symbols.
B Loving our own writing is scientifically reasonable.
C The writers and critics can never reach an agreement.
D Thinking and writing are different stages of mind at work.
第4题：
A. The network has been stable for at least the last 45 minutes
B. There is a flapping link or interf ace, and router C knows an alternate path to the network
C. There is a flapping link or interface, and router A does not know an alternate path to the network
D. EIGRP is not working correctly on router C
E. There is not enough information to make a determination
第5题：
A. Issue the command bandwidth 224 on the physical interface.
B. Issue the command bandwidth 56 on the physical interface.
C. Issue the command bandwidth 224 on each subinterface.
D. Issue the command bandwidth 56 on each subinterface.
第6题：
What can we say about the discovery of Mangrove Rivulus?
A. It was made quite by accident
B. It was based on a lab test of sea life
C. It was supported by an American magazine
D. It was helped by Patricia Wright
第7题：
A.I don't care about it
B.The case is difficult
C.We would consult our layer
第8题：
What can we conclude from the recent study?
A. People think highly of science.
B. People hold mixed opinions about science.
C. Science is getting dangerously out of control.
D. Science is used for both good and bad purposes.
第9题：
Refer to the exhibits. You are verifying your OSPF implementation, and it does not seem to be functioning properly. What can you conclude from the exhibit and the show running - configuration command output? （）
A. The OSPF areas are not configured correctly.
B. The wildcard masks for the 10.x .x.x networks are incorrect.
C. The 172.16.x.x networks need to be connected to area 0 using virtual links.
D. The 172.16.x.x networks are discontiguous. OSPF is automatically summarizing them to 172.16.0.0/16 and data is being "black holed."
E. There is not enough information to make a determination.
第10题：
A. The default administrative distance has been changed.
B. IS - IS is not enabled.
C. Three physical interfaces are taking part in integrated IS - IS.
D. IS - IS is not redistributing any oth er routing protocols.
E. There are two neighboring routers sending IS - IS routing information.
F. Address summarization is configured.