You have just taken over as the Network Administrator for a medium sized company. You want to check to see what services are exposed to the outside world. What tool would you use to accomplish this?

The correct answer is C. A port scanner. A port scanner is often used on the periphery of a network by either administrators or hackers. It will tell you what ports are open. By determining what ports are open, you know what services are exposed to the outside world. For example, if port 80 is open, then HTTP traffic…

Network & Perimeter Auditing

Question

Options

ANetwork mapper
BProtocol analyzer
CA port scanner
DPacket sniffer

How the community answered

(44 responses)

A
5% (2)
B
11% (5)
C
77% (34)
D
7% (3)

Explanation

A port scanner is often used on the periphery of a network by either administrators or hackers. It will tell you what ports are open. By determining what ports are open, you know what services are exposed to the outside world. For example, if port 80 is open, then HTTP traffic is allowed, meaning there should be a Web server on the network. Answer: A is incorrect. Network mappers give a topography of the network, letting you know what is on your network and where it is connected. Answer: B is incorrect. A protocol analyzer does detect if a given protocol is moving over a particular network segment, thus would detect services working on that segment. However, a port scanner is a better tool for detecting all the ports that are open. Answer: D is incorrect. Packet sniffers are used to intercept traffic and to detect the contents of

Topics

#port scanning#service enumeration#network assessment#exposed services

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