312-49v10

312-49v10 practice questions, page 32 of 34, with answer review and explanations.

Question 156

John is using Firewalk to test the security of his Cisco PIX firewall. He is also utilizing a sniffer located on a subnet that resides deep inside his network. After analyzing the sniffer log files, he does not see any of the traffic produced by Firewalk. Why is that?

  1. Firewalk cannot pass through Cisco firewalls
  2. Firewalk sets all packets with a TTL of zero
  3. Firewalk cannot be detected by network sniffers
  4. Firewalk sets all packets with a TTL of one

Question 157

After undergoing an external IT audit, George realizes his network is vulnerable to DDoS attacks.What countermeasures could he take to prevent DDoS attacks?

  1. Enable direct broadcasts
  2. Disable direct broadcasts
  3. Disable BGP
  4. Enable BGP

Question 158

George is performing security analysis for Hammond and Sons LLC. He is testing security vulnerabilities of their wireless network. He plans on remaining as"stealthy" as possible during the scan. Why would a scanner like Nessus is not recommended in this situation?

  1. Nessus is too loud
  2. Nessus cannot perform wireless testing
  3. Nessus is not a network scanner
  4. There are no ways of performing a "stealthy" wireless scan

Question 159

At what layer of the OSI model do routers function on?

  1. 4
  2. 3
  3. 1
  4. 5

Question 160

Frank is working on a vulnerability assessment for a company on the West coast. The company hired Frank to assess its network security through scanning, pen tests, and vulnerability assessments. After discovering numerous known vulnerabilities detected by a temporary IDS he set up, he notices a number of items that show up as unknown but Questionable in the logs. He looks up the behavior on the Internet, but cannot find anything related. What organization should Frank submit the log to find out if it is a new vulnerability or not?

  1. APIPA
  2. IANA
  3. CVE
  4. RIPE