Cisco Certified Network Associate (CCNA) Practice Exam

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What command is used to configure a summary address on an EIGRP router?

ip summary-address eigrp AS IP NETWORK ADDRESS AND SUBNETMASK
ip eigrp summary-address NETWORK ADDRESS SUBNETMASK
summary-address eigrp AS IP NETWORK ADDRESS
configure summary-address eigrp NETWORK ADDRESS SUBNETMASK

The correct answer is: ip summary-address eigrp AS IP NETWORK ADDRESS AND SUBNETMASK

The command used to configure a summary address on an EIGRP router is indeed "ip summary-address eigrp AS IP NETWORK ADDRESS AND SUBNETMASK." This command is essential in implementing route summarization in EIGRP. Route summarization helps in reducing the size of the routing table by grouping multiple routes into a single summarized route. When configuring a summary address, the command specifies the autonomous system (AS) number for EIGRP, followed by the network address and subnet mask of the summarized route. This allows the EIGRP router to advertise a single summary address rather than individual subnet routes, enhancing the efficiency of routing and minimizing the amount of routing information exchanged between routers. The other options do not follow the correct syntax needed for summarizing routes in EIGRP, or they lack specific elements required for the configuration, making them inappropriate choices for this task.