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Which Type of scan sends a packets with no flags set ? Select the Answer

  1. Open Scan
  2. Null Scan
  3. Xmas Scan
  4. Half-Open Scan

Answer(s): B

Explanation:

The types of port connections supported are:



While doing fast scan using –F option, which file is used to list the range of ports to scan by nmap?

  1. services
  2. nmap-services
  3. protocols
  4. ports

Answer(s): B

Explanation:

Nmap uses the nmap-services file to provide additional port detail for almost every scanning method. Every time a port is referenced, it's compared to an available description in this support file. If the nmap-services file isn't available, nmap reverts to the /etc/services file applicable for the current operating system.



Bob is a Junior Administrator at ABC.com is searching the port number of POP3 in a file. The partial output of the file is look like:


In which file he is searching?

  1. services
  2. protocols
  3. hosts
  4. resolve.conf

Answer(s): A

Explanation:

The port numbers on which certain standard services are offered are defined in the RFC 1700 Assigned Numbers. The /etc/services file enables server and client programs to convert service names to these numbers -ports. The list is kept on each host and it is stored in the file
/etc/services.



Exhibit:

Please study the exhibit carefully.
Which Protocol maintains the communication on that way?

  1. UDP
  2. IP
  3. TCP
  4. ARP
  5. RARP

Answer(s): C

Explanation:

A TCP connection is always initiated with the 3-way handshake, which establishes and negotiates the actual connection over which data will be sent.






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