What ports should be blocked on the firewall to prevent NetBIOS traffic from not coming through the firewall if your network is comprised of Windows NT, 2000, and XP?(Choose all that apply.
Answer(s): B,C,E
NetBIOS traffic can quickly be used to enumerate and attack Windows computers. Ports 135, 139, and 445 should be blocked.
What is a NULL scan?
Answer(s): A
A null scan has all flags turned off.
What is the proper response for a NULL scan if the port is open?
Answer(s): F
A NULL scan will have no response if the port is open.
Which of the following statements about a zone transfer correct?(Choose three.
Answer(s): A,C,E
Securing DNS servers should be a priority of the organization. Hackers obtaining DNS information can discover a wealth of information about an organization. This information can be used to further exploit the network.
You have the SOA presented below in your Zone. Your secondary servers have not been able to contact your primary server to synchronize information. How long will the secondary servers attempt to contact the primary server before it considers that zone is dead and stops responding to queries?collegae.edu.SOA, cikkye.edu ipad.college.edu. (200302028 3600 3600 604800 3600)
Answer(s): C
The numbers represents the following values: 200302028; se = serial number3600; ref = refresh = 1h3600; ret = update retry = 1h604800; ex = expiry = 1w3600; min = minimum TTL = 1h
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