View the following configuration:
hostname R1 i boot system flash enable password ccie interface Ethernet 0
ip address 10.72.128.45 255.255.255.0 i interface SerialO ip address 126.96.36.199 255.255.255.0
ip access-group 100 in i interface Serial1 no ip address line con 0 line aux 0 transport input all line vty 0 4 no login
What is the purpose of the ip access-group 100 in command?
O a. Configures the access list to deny all inbound traffic on the serial 0 interface
O b. Configures the router to permit all traffic, because access list 100 has not been defined
O c. Specifies that the interface is not enabled for IP routing
O d. Instructs the router to only permit packets from the network 188.8.131.52/24.
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