Refer to the exhibit. EIGRP has been configured on all routers in the network. What additional configuration statement should be included on router R4 to advertise a default route to its neighbors？（）
A. R4（config）# ip default-network 10.0.0.0
B. R4（config）# ip route 0.0.0.0 0.0.0.0 10.1.1.1
C. R4（config）# ip route 10.0.0.0 255.0.0.0 10.1.1.1
D. R4（config-router）# default-information originate
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Refer to the exhibit. Which two statements are correct？（）
All six routes will be installed in the routing table
B. Two routes will be installed in the routing table
C. Four routes will be installed in the routing table
D. All the routes were redistributed into BGP from an IGP
E. All the routes were originated by BGP with the network command
新陈代谢是指（）。
A. 产生新物质取代旧物质的作用
B. 活细胞中全部有序的化学变化的总称
C. 吐故纳新
D. 生老病死
What are two rules for compacting IPv6 addresses？（）
A. The maximum number of times a double colon can replace a 16-bit segment that consists of all zeroes is two
B. The leading zeroes in any 16-bit segment do not have to be written.
C. Every 16-bit segment that consists of all zeroes can be represented with a single colon
D. The trailing zeroes in any 16-bit segment do not have to be written.
E. Any single， continuous string of one or more 16-bit segments that consists of all zeroes can be represented with a double colon
F. Two zeroes in the middle of any 16-bit segment do not have to be written
Refer to the exhibit. Which two statements are correct regarding the creation of a multicastdistribution tree？ （）
A. Each router determines where to send the JOIN request.
B. The tree will be built based on the IP address of the E2 interface on router E
C. The best path to the source will be discovered in the unicast routing table on router B
D. The best path to the source will be discovered in the unicast routing table on router C
E. The best path to the source will be discovered in the unicast routing table on router E
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