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最新的 Certified Ethical Hacker EC0-350 免費考試真題:

1. Choose one of the following pseudo codes to describe this statement:
"If we have written 200 characters to the buffer variable, the stack should stop because it cannot hold any more data."

A) If (I < 200) then exit (1)
B) If (I > 200) then exit (1)
C) If (I <= 200) then exit (1)
D) If (I >= 200) then exit (1)

2. A specific site received 91 ICMP_ECHO packets within 90 minutes from 47 different sites. 77 of the ICMP_ECHO packets had an ICMP ID. 39612 and Seq:57072. 13 of the ICMP_ECHO packets had an ICMP ID. 0 and Seq:0. What can you infer from this information?

A) 13 packets were from an external network and probably behind a NAT, as they had an ICMP ID 0 and Seq 0
B) All 77 packets came from the same LAN segment and hence had the same ICMP ID and Seq number
C) ICMP ID and Seq numbers were most likely set by a tool and not by the operating system
D) The packets were sent by a worm spoofing the IP addresses of 47 infected sites

3. SYN Flood is a DOS attack in which an attacker deliberately violates the three-way handshake and opens a large number of half-open TCP connections. The signature of attack for SYN Flood contains:

A) The source and destination port numbers having the same value
B) A large number of SYN packets appearing on a network without the corresponding reply packets
C) A large number of SYN packets appearing on a network with the corresponding reply packets
D) The source and destination address having the same value

4. Use the traceroute results shown above to answer the following question:

The perimeter security at targetcorp.com does not permit ICMP TTL-expired packets out.

A) True
B) False

5. A network admin contacts you. He is concerned that ARP spoofing or poisoning might occur on his network. What are some things he can do to prevent it?
Select the best answers.

A) If you have a small network, use static ARP entries.
B) Use a firewall between all LAN segments.
C) Use a tool like ARPwatch to monitor for strange ARP activity.
D) Use port security on his switches.
E) Use only static IP addresses on all PC's.

問題與答案：