What does the 63.78.199.4(161) denotes in a Cisco router log? Mar 14 22:57:53.425 EST: %SEC-6-IPACCESSLOGP: list internet-inbound denied udp 66.56.16.77(1029) -> 63.78.199.4(161), 1 packet

The correct answer is A. Destination IP address. In Cisco access list log entries, the format is: source_IP(source_port) -> destination_IP(destination_port). In this log line, 66.56.16.77(1029) is the source IP address with source port 1029, and 63.78.199.4(161) is the destination IP address with destination port 161. Port…

Submitted by ravi_2018· Apr 18, 2026Network Forensics

Question

Options

ADestination IP address
BSource IP address
CLogin IP address
DNone of the above

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(53 responses)

A
87% (46)
B
8% (4)
C
4% (2)
D
2% (1)

Explanation

In Cisco access list log entries, the format is: source_IP(source_port) -> destination_IP(destination_port). In this log line, 66.56.16.77(1029) is the source IP address with source port 1029, and 63.78.199.4(161) is the destination IP address with destination port 161. Port 161 is the standard SNMP (Simple Network Management Protocol) port, indicating the source was attempting an SNMP query that was blocked by the access control list named 'internet-inbound'.

Topics

#Network log analysis#Cisco logging#IP addressing#Traffic flow

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