The configuration of R1 to R6 are posted below for your reference, useless lines are omitted: How much bandwidth is available for use by EIGRP on the R1 Ethernet 0/0 interface?
正解:C
Explanation/Reference: Explanation: Check with the "show running-config" command on R1: In the "ip bandwitdh-percent eigrp 1 20" command, "1" is the EIGRP AS number while "20" is the percent of interface's bandwidth that EIGRP is allowed to use.