312-49V11 · Question #48
Mia, a network administrator, is reviewing the logs of a Cisco router after noticing some performance degradation in her network. While examining the logs, she encounters a particular message that…
The correct answer is A. %SEC-4-TOOMANY. According to the CHFI v11 Network Forensics and Log Analysis objectives, Cisco IOS log messages use standardized mnemonics to describe specific security and packet-processing conditions. The message indicating that "there was not enough room for all of the desired IP header…
Question
Mia, a network administrator, is reviewing the logs of a Cisco router after noticing some performance degradation in her network. While examining the logs, she encounters a particular message that states: "The system was not able to process the packet because there was not enough room for all of the desired IP header options." Mia needs to identify which mnemonic in the Cisco IOS logs corresponds to this specific issue. Which of the following log mnemonics should Mia look for to find this message?
Options
- A%SEC-4-TOOMANY
- B%IPV6-6-ACCESSLOGP
- C%SEC-6-IPACCESSLOGP
- D%SEC-6-IPACCESSLOGRL
How the community answered
(50 responses)- A82% (41)
- B10% (5)
- C2% (1)
- D6% (3)
Explanation
According to the CHFI v11 Network Forensics and Log Analysis objectives, Cisco IOS log messages use standardized mnemonics to describe specific security and packet-processing conditions. The message indicating that "there was not enough room for all of the desired IP header options" is associated with abnormal or excessive IP header options, which can be indicative of malformed packets, reconnaissance activity, or denial-of-service (DoS) attempts. The mnemonic %SEC-4-TOOMANY is generated when a router receives packets containing too many IP options for the available buffer space. Cisco devices impose limits on IP header options to protect system resources, and when these limits are exceeded, the packet is dropped and logged with this mnemonic. CHFI v11 highlights such logs as important artifacts when investigating network performance degradation, packet manipulation, and potential attack traffic.
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