Refer to the Exhibit.
— Exhibit –user@R1> show pfe statistics traffic
Packet Forwarding Engine traffic statistics:
Input packets: 47593914461368 2 pps
Output packets: 28805646 3 pps
Packet Forwarding Engine local traffic statistics:
Local packets input : 36278104324

Local packets output : 2
Software input control plane drops : 0
Software input high drops : 0
Software input medium drops : 0
Software input low drops : 0
Software output drops : 0
Hardware input drops : 191367536738
Packet Forwarding Engine local protocol statistics:
HDLC keepalives : 0
ATM OAM : 0
Frame Relay LMI : 0
PPP LCP/NCP : 0
OSPF hello : 3883169
OSPF3 hello : 0
RSVP hello : 1440704
LDP hello : 4782297
BFD : 0
IS-IS IIH : 0
LACP : 0
ARP : 765512
ETHER OAM : 0
Unknown : 1897610
Packet Forwarding Engine hardware discard statistics:
Timeout : 0
Truncated key : 0
Bits to test : 0
Data error : 0

Stack underflow : 0
Stack overflow : 0
Normal discard : 191367536738
Extended discard : 0
Invalid interface : 0
Info cell drops : 191367536738
Fabric drops : 191367536738
Packet Forwarding Engine Input IPv4 Header Checksum Error and Output MTU Error statistics:
Input Checksum : 0
Output MTU : 0
— Exhibit –Referring to the exhibit, which counter indicates a possible denial of service attack?

A.
hardware input drops

B.
normal discard

C.
info cell drops

D.
fabric drops

Explanation: