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单选题An attacker sends a low rate of TCP SYN segments to hosts， hoping that at least one port replies. Which type of an attack does this scenario describe？（）A DoSB SYN floodC port scanningD IP address sweep

题目
单选题
An attacker sends a low rate of TCP SYN segments to hosts， hoping that at least one port replies. Which type of an attack does this scenario describe？（）
A

DoS

B

SYN flood

C

port scanning

D

IP address sweep

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相似问题和答案

第1题：

For which network anomaly does Junos provide a SCREEN?()

A. a telnet to port 80

B. a TCP packet with the SYN and ACK flags set

C. an SNMP getnext request

D. an ICMP packet larger than 1024 bytes


参考答案：D

第2题：

TCP/IP的通信过程是？（）

  • A、——SYN/ACK——>，<——ACK，——SYN/ACK——>
  • B、——SYN/ACK——>，<——SYN/ACK——，——ACK——>
  • C、——SYN——>，<——ACK，——SYN——>，<——ACK——
  • D、——SYN——>，<——SYN/ACK——，——ACK——>

正确答案:D

第3题：

Which two types of attacks are considered to be denial of service?() (Choose two.)

A. zombie agents

B. SYN flood

C. IP packet fragments

D. WinNuke


参考答案：B, D

第4题：

For which network anomaly does Junos provide a SCREEN?（）

  • A、a telnet to port 80
  • B、a TCP packet with the SYN and ACK flags set
  • C、an SNMP getnext request
  • D、an ICMP packet larger than 1024 bytes

正确答案:D

第5题：

NBAR supports all of these with the exception of which one？（）

  • A、HTTP
  • B、IP multicast
  • C、TCP flows with dynamically assigned port numbers
  • D、non-UDP protocols

正确答案:B

第6题：

On which destination port in the Layer 4 header does BGP listen?()

A. UDP port 169

B. TCP port 169

C. UDP port 179

D. TCP port 179


参考答案：D

第7题：

Which of the following descriptions about IP spoofing is correct？（）

  • A、IP source address is forged
  • B、IP destination address is forged
  • C、IP TCP source port is forged
  • D、IP TCP destination port is forged
  • E、None of above

正确答案:A

第8题：

Which parameters are valid SCREEN options for combating operating system probes?()

A. syn-fin, syn-flood, and tcp-no-frag

B. syn-fin, port-scan, and tcp-no-flag

C. syn-fin, fin-no-ack, and tcp-no-frag

D. syn-fin, syn-ack-ack-proxy, and tcp-no-frag


参考答案：C

第9题：

Interface ge-0/0/2.0 of your router is attached to the Internet and is configured with an IP address and network mask of 71.33.252.17/24. A host with IP address 10.20.20.1 is running an HTTP service on TCP port 8080. This host isattached to the ge-0/0/0.0 interface of your router. You must use interface-based static NAT to make the HTTP service on the host reachable from the Internet. On which IP address and TCP port can Internet hosts reach the HTTP service?（）

  • A、IP address 10.10.10.1 and TCP port 8080
  • B、IP address 71.33.252.17 and TCP port 80
  • C、IP address 71.33.251.19 and TCP port 80
  • D、IP address 71.33.252.19 and TCP port 8080

正确答案:D

第10题：

Nmap工具不可以执行下列哪种方式扫描（）。

  • A、目录遍历扫描
  • B、TCP SYN扫描
  • C、TCP connect扫描
  • D、UDP port扫描

正确答案:A

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