GSNA 試験問題を無料オンラインアクセス

You work as a Network Administrator for XYZ CORP. The company has a Linux-based network. The company needs to provide secure network access. You have configured a firewall to prevent certain ports and applications from forwarding the packets to the company's intranet. What does a firewall check to prevent these ports and applications from forwarding the packets to the intranet?

• A.The transport layer port numbers and the application layer headers
• B.The network layer headers and the session layer port numbers
• C.Explanation:
  A firewall stops delivery of packets that are not marked safe by the Network Administrator. It checks the transport layer port numbers and the application layer headers to prevent certain ports and applications from forwarding the packets to an intranet.
• D.The presentation layer headers and the session layer port numbers
• E.The application layer port numbers and the transport layer headers

You work as the Network Administrator for XYZ CORP. The company has a Unix-based network. You want to run a command that forces all the unwritten blocks in the buffer cache to be written to the disk. Which of the following Unix commands can you use to accomplish the task?

• A.sync
• B.tune2fs
• C.swapon
• D.swapoff

Which of the following statements are true about WPA?

• A.Shared-key WPA is vulnerable to password cracking attacks if a weak passphrase is used.
• B.WPA provides better security than WEP.
• C.WPA-PSK converts the passphrase into a 256-bit key.
• D.WPA-PSK requires a user to enter an 8-character to 63-character passphrase into a wireless client.

This is a Windows-based tool that is used for the detection of wireless LANs using the IEEE 802.11a, 802.11b, and 802.11g standards. The main features of these tools are as follows: It displays the signal strength of a wireless network, MAC address, SSID, channel details, etc. It is commonly used for the following purposes: a.War driving b.Detecting unauthorized access pointsc.Detecting causes of interference on a WLAN d.WEP ICV error trackinge.Making Graphs and Alarms on 802.11 Data, including Signal Strength This tool is known as __________.

• A.Absinthe
• B.NetStumbler
• C.Kismet
• D.THC-Scan

In which of the following techniques does an attacker take network traffic coming towards a host at one port and forward it from that host to another host?

• A.Firewalking
• B.Port redirection
• C.Snooping
• D.UDP port scanning