While performing a ping sweep of a local subnet you receive an ICMP reply of Code 3/Type 13 for
all the pings you have sent out. What is the most likely cause of this?
A.
The firewall is dropping the packets
B.
An in-line IDS is dropping the packets
C.
A router is blocking ICMP
D.
The host does not respond to ICMP packets
HI admin,
i don’t think it’s a router blocking ICMP , if it was a layer 3 device it close to be a Firewall.
but i think the answer is
B.An in-line IDS is dropping the packets
coz the IDS works at layer 2 and the ping on the private Subnet is operating at layer 2 , no need to go to the gateway, it is operating over ARP.
my answer is c
if Firewall is not allowed traffic , the respond will come as ” request time out ” ICMP code 11
IDS only for detection , not for prevention so it can’t stop packet
router is not block the ICMP, but if routing is not available to route the packet, then response is Code 3/Type 13 means – Destination Unreachable , so the answer make confuse but this is the correct answer
if host not response to the reply will be request time out ” ICMP code 11
Answer is C
A IDS can´t drop packets. It only detect
C
local network excludes the router and the FW, IDS works as detector, so the only reasonable answer could be D.
in my opinion the answer is D because Code 3/Type 13 means – Destination Unreachable code3 and Type 13 – Communication Administratively Prohibited. But could be in the same time C.
my answer is c
if Firewall is not allowed traffic , the respond will come as ” request time out ” ICMP code 11
IDS only for detection , not for prevention so it can’t stop packet
router is not block the ICMP, but if routing is not available to route the packet, then response is Code 3/Type 13 means – Destination Unreachable , so the answer make confuse but this is the correct answer
if host not response to the reply will be request time out ” ICMP code 11