Which of the following firewalls are used to track

Which of the following firewalls are used to track the state of active connections and
determine the network packets allowed to enter through the firewall?Each correct answer
represents a complete solution. Choose all that apply.
A. Circuit-level gateway
B. Stateful
C. Proxy server
D. Dynamic packet-filtering
Answer: B,D
Explanation:
A dynamic packet-filtering firewall is a fourth generation firewall technology. It is also known
as a stateful firewall. It tracks the state of active connections and determines which network
Question No : 87 CORRECT TEXT - (Topic 1)
Question No : 88 - (Topic 1)
ECCouncil 312-38 : Practice Test
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packets are allowed to enter through the firewall. It records session information, such as IP
addresses and port numbers to implement a more secure network. The dynamic packet-
filtering firewall operates at Layer3, Layer4, and Layer5.
Answer option A is incorrect. A circuit-level gateway is a type of firewall that works at the
session layer of the OSI model between the application layer and the transport layer of the
TCP/IP stack. They monitor TCP handshaking between packets to determine whether a
requested session is legitimate. Information passed to a remote computer through a circuit
level gateway appears to have originated from the gateway. This is useful for hiding
information about protected networks. Circuit-level gateways are relatively inexpensive and
have the advantage of hiding information about the private network they protect.
Answer option C is incorrect. A proxy server firewall intercepts all messages entering and
leaving the network. The proxy server effectively hides the true network addresses.
Which of the following techniques is used for drawing symbols in public places for
advertising an open Wi-Fi wireless network?
A. Spamming
B. War driving
C. War dialing
D. Warchalking
Answer: D
Explanation:
Warchalking is the drawing of symbols in public places to advertise an open Wi-Fi wireless
network. Having found a Wi-Fi node, the warchalker draws a special symbol on a nearby
object, such as a wall, the pavement, or a lamp post. The name warchalking is derived
from the cracker terms war dialing and war driving.
Answer option B is incorrect. War driving, also called access point mapping, is the act of
locating and possibly exploiting connections to wireless local area networks while driving
around a city or elsewhere. To do war driving, one needs a vehicle, a computer (which can
be a laptop), a wireless Ethernet card set to work in promiscuous mode, and some kind of
an antenna which can be mounted on top of or positioned inside the car. Because a
wireless LAN may have a range that extends beyond an office building, an outside user
may be able to intrude into the network, obtain a free Internet connection, and possibly gain
Question No : 89 - (Topic 1)
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