CompTIA CompTIA Security+ JK0-022 Questions & Answers

• Question 1111:

  Ann, a technician, is attempting to establish a remote terminal session to an end user's computer using Kerberos authentication, but she cannot connect to the destination machine. Which of the following default ports should Ann ensure is open?

  A. 22

  B. 139

  C. 443

  D. 3389

  Correct Answer: D

  Remote Desktop Protocol (RDP) uses TCP port 3389.

  Incorrect Answers:

  A: SSH uses TCP port 22. All protocols encrypted by SSH also use TCP port 22, such as SFTP, SHTTP, SCP, SExec, and slogin.

  B: NetBIOS Session service uses TCP port 139.

  C: HTTPS uses TCP port 443

  References:

  Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 51, 52.

• Question 1112:

  A technician is unable to manage a remote server. Which of the following ports should be opened on the firewall for remote server management? (Select TWO).

  A. 22

  B. 135

  C. 137

  D. 143

  E. 443

  F. 3389

  Correct Answer: AF

  A secure remote administration solution and Remote Desktop protocol is required. Secure Shell (SSH) is a secure remote administration solution and makes use of TCP port 22. Remote Desktop Protocol (RDP) uses TCP port 3389.

  Incorrect Answers:

  B: Port 135 is used by Microsoft EPMAP (End Point Mapper), also known as DCE/RPC Locator service, which is used to remotely manage services including DHCP server, DNS server and WINS.

  C: NetBIOS Name Service uses TCP port 137.

  D: Internet Message Access Protocol v4 (IMAP4) uses TCP port 143.

  E: HTTPS uses TCP port 443

  References:

  Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 51, 52.

  http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

• Question 1113:

  Which of the following ports would be blocked if Pete, a security administrator, wants to deny access to websites?

  A. 21

  B. 25

  C. 80

  D. 3389

  Correct Answer: C

  Port 80 is used by HTTP, which is the foundation of data communication for the World Wide Web.

  Incorrect Answers:

  A: FTP uses TCP port 21.

  B: SMTP uses TCP port 25.

  D: Remote Desktop Protocol (RDP) uses TCP port 3389.

  References:

  Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 51, 52.

• Question 1114:

  A technician has just installed a new firewall onto the network. Users are reporting that they cannot reach any website. Upon further investigation, the technician determines that websites can be reached by entering their IP addresses. Which of the following ports may have been closed to cause this issue?

  A. HTTP

  B. DHCP

  C. DNS

  D. NetBIOS

  Correct Answer: C

  DNS links IP addresses and human-friendly fully qualified domain names (FQDNs), which are made up of the Top-level domain (TLD), the registered domain name, and the Subdomain or hostname.

  Therefore, if the DNS ports are blocked websites will not be reachable.

  Incorrect Answers:

  A: HTTP is responsible for the transmission of HTML documents and embedded multimedia components.

  B: Dynamic Host Configuration Protocol (DHCP) allows DHCP servers to assign, or lease, IP addresses to computers and other devices that are enabled as DHCP clients.

  D: NetBIOS is a program that allows applications on different computers to communicate within a local area network (LAN).

  References:

  Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 42, 46. https://technet.microsoft.com/en-us/library/cc896553(v=ws.10).aspx http://en.wikipedia.org/wiki/NetBIOS

• Question 1115:

  A security technician needs to open ports on a firewall to allow for domain name resolution. Which of the following ports should be opened? (Select TWO).

  A. TCP 21

  B. TCP 23

  C. TCP 53

  D. UDP 23

  E. UDP 53

  Correct Answer: CE

  DNS uses TCP and UDP port 53. TCP port 53 is used for zone transfers, whereas UDP port 53 is used for queries.

  Incorrect Answers:

  A:

  FTP uses TCP port 21.

  B.

  D: Telnet uses port 23.

  References:

  Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, p 51. http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

• Question 1116:

  During the analysis of a PCAP file, a security analyst noticed several communications with a remote server on port 53. Which of the following protocol types is observed in this traffic?

  A. FTP

  B. DNS

  C. Email

  D. NetBIOS

  Correct Answer: B

  DNS (Domain Name System) uses port 53.

  Incorrect Answers:

  A: FTP (File Transfer Protocol) uses ports 20 and 21, not port 53.

  C: Email uses multiple ports depending on what aspect of `email' we're talking about. For example SMTP (Simple Mail Transfer Protocol) used for sending email uses port 25. POP3 and IMAP, two methods of accessing and downloading email use ports 110 and 143 respectively.

  D: NetBIOS uses ports 137, 138 and 139.

  References: http://en.wikipedia.org/wiki/Domain_Name_System http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

• Question 1117:

  Which of the following secure file transfer methods uses port 22 by default?

  A. FTPS

  B. SFTP

  C. SSL

  D. S/MIME

  Correct Answer: B

  SSH uses TCP port 22. All protocols encrypted by SSH, including SFTP, SHTTP, SCP, SExec, and slogin, also use TCP port 22. Incorrect Answers:

  A: FTPS uses ports 989 and 990.

  C: SSL operates over TCP port 443.

  D: S/MIME is an Internet standard for encrypting and digitally signing e-mail.

  References:

  Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 45, 51, 313.

• Question 1118:

  Which of the following ports is used to securely transfer files between remote UNIX systems?

  A. 21

  B. 22

  C. 69

  D. 445

  Correct Answer: B

  SCP copies files securely between hosts on a network. It uses SSH for data transfer, and uses the same authentication and provides the same security as SSH. Unlike RCP, SCP will ask for passwords or passphrases if they are needed for authentication. SSH uses TCP port 22. All protocols encrypted by SSH, including SFTP, SHTTP, SCP, SExec, and slogin, also use TCP port 22.

  Incorrect Answers:

  A: Port 21 is used by FTP.

  C: Port 69 is used by TFTP.

  D: Port 445 is used by Microsoft-DS.

  References: http://www.computerhope.com/unix/scp.htm Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, p 51. http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

• Question 1119:

  Which of the following ports should be used by a system administrator to securely manage a remote server?

  A. 22

  B. 69

  C. 137

  D. 445

  Correct Answer: A

  Secure Shell (SSH) is a more secure replacement for Telnet, rlogon, rsh, and rcp. SSH can be called a remote access or remote terminal solution. SSH offers a means by which a command- line, text-only interface connection with a server, router, switch, or similar device can be established over any distance. SSH makes use of TCP port 22.

  Incorrect Answers:

  B: Port 69 is used by TFTP.

  C: NetBIOS uses port 137.

  D: Port 445 is used by Microsoft-DS.

  References:

  Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 42, 51.

  http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers

• Question 1120:

  Which of the following uses port 22 by default? (Select THREE).

  A. SSH

  B. SSL

  C. TLS

  D. SFTP

  E. SCP

  F. FTPS

  G. SMTP

  H. SNMP

  Correct Answer: ADE

  SSH uses TCP port 22. All protocols encrypted by SSH, including SFTP, SHTTP, SCP, SExec, and slogin, also use TCP port 22.

  Incorrect Answers:

  B: SSL operates over TCP port 443.

  C: TLS can operate over TCP ports 443 and 80.

  F: FTPS uses ports 989 and 990.

  G: SMTP uses TCP port 25.

  H: SNMP makes use of UDP ports 161 and 162.

  References:

  Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 42, 45, 51.

  http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers