Exam Code: comptia security+ sy0 401 pdf (Practice Exam Latest Test Questions VCE PDF)
Exam Name: CompTIA Security+ Certification
Certification Provider: CompTIA
Free Today! Guaranteed Training- Pass sy0 401 study guide pdf Exam.
Q1. Which of the following could cause a browser to display the message below?
"The security certificate presented by this website was issued for a different website’s address."
A. The website certificate was issued by a different CA than what the browser recognizes in its trusted CAs.
B. The website is using a wildcard certificate issued for the company’s domain.
C. HTTPS://127.0.01 was used instead of HTTPS://localhost.
D. The website is using an expired self signed certificate.
Answer: C
Explanation:
PKI is a two-key, asymmetric system with four main components: certificate authority (CA), registration authority (RA), RSA (the encryption algorithm), and digital certificates. In typical public key infrastructure (PKI) arrangements, a digital signature from a certificate authority (CA) attests that a particular public key certificate is valid (i.e., contains correct information). Users, or their software on their behalf, check that the private key used to sign some certificate matches the public key in the CA's certificate. Since CA certificates are often signed by other, "higher-ranking," CAs, there must necessarily be a highest CA, which provides the ultimate in attestation authority in that particular PKI scheme. Localhost is a hostname that means this computer and may be used to access the computer's own network services via its loopback network interface. Using the loopback interface bypasses local network interface hardware. In this case the HTTPS://127.0.01 was used and not HTTPS//localhost
Q2. Sara, a company’s security officer, often receives reports of unauthorized personnel having access codes to the cipher locks of secure areas in the building. Sara should immediately implement which of the following?
A. Acceptable Use Policy
B. Physical security controls
C. Technical controls
D. Security awareness training
Answer: D
Explanation:
Security awareness and training include explaining policies, procedures, and current threats to both users and management. A security awareness and training program can do much to assist in your efforts to improve and maintain security. A good security awareness training program for the entire organization should cover the following areas: Importance of security; Responsibilities of people in the organization; Policies and procedures; Usage policies; Account and password-selection criteria as well as Social engineering prevention.
Q3. Which of the following protocols is the security administrator observing in this packet capture?
12:33:43, SRC 192.168.4.3:3389, DST 10.67.33.20:8080, SYN/ACK
A. HTTPS
B. RDP
C. HTTP
D. SFTP
Answer: B
Explanation:
Remote Desktop Protocol (RDP) is a proprietary protocol developed by Microsoft, which provides
a user with a graphical interface to connect to another computer over a network connection.
Example of RDP tracing output:
No. Time Delta Source Destination Protocol Length Info
5782, 2013-01-06 09:52:15.407, 0.000 , SRC 10.7.3.187 , DST 10.0.107.58, TCP, 62, 3389 >
59193 [SYN, ACK]
Q4. Ann, a security administrator, has concerns regarding her company’s wireless network. The network is open and available for visiting prospective clients in the conference room, but she notices that many more devices are connecting to the network than should be.
Which of the following would BEST alleviate Ann’s concerns with minimum disturbance of current functionality for clients?
A. Enable MAC filtering on the wireless access point.
B. Configure WPA2 encryption on the wireless access point.
C. Lower the antenna’s broadcasting power.
D. Disable SSID broadcasting.
Answer: C
Explanation:
Some access points include power level controls that allow you to reduce the amount of output provided if the signal is traveling too far.
Q5. DRAG DROP
Drag and drop the correct protocol to its default port.
Answer:
Explanation:
FTP uses TCP port 21.
Telnet uses port 23.
SSH uses TCP port 22. All protocols encrypted by SSH, including SFTP, SHTTP, SCP, SExec,
and slogin, also use TCP port 22. Secure Copy Protocol (SCP) is a secure file-transfer facility
based on SSH and Remote Copy Protocol (RCP). Secure FTP (SFTP) is a secured alternative to
standard File Transfer Protocol (FTP).
SMTP uses TCP port 25.
Port 69 is used by TFTP.
SNMP makes use of UDP ports 161 and 162.
References:
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp 42, 45,
http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
Q6. Ann wants to send a file to Joe using PKI. Which of the following should Ann use in order to sign the file?
A. Joe’s public key
B. Joe’s private key
C. Ann’s public key
D. Ann’s private key
Answer: D
Explanation:
The sender uses his private key, in this case Ann's private key, to create a digital signature. The message is, in effect, signed with the private key. The sender then sends the message to the receiver. The receiver uses the public key attached to the message to validate the digital signature. If the values match, the receiver knows the message is authentic. The receiver uses a key provided by the sender—the public key—to decrypt the message. Most digital signature implementations also use a hash to verify that the message has not been altered, intentionally or accidently, in transit.
Q7. Recent data loss on financial servers due to security breaches forced the system administrator to harden their systems. Which of the following algorithms with transport encryption would be implemented to provide the MOST secure web connections to manage and access these servers?
A. SSL
B. TLS
C. HTTP
D. FTP
Answer: B
Explanation:
Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), are cryptographic protocols designed to provide communications security over a computer network. Transport Layer Security (TLS) is a security protocol that expands upon SSL. Many industry analysts predict that TLS will replace SSL in the future. TLS 1.0 was first defined in RFC 2246 in January 1999 as an upgrade of SSL Version 3.0. As of February 2015, the latest versions of all major web browsers support TLS 1.0, 1.1, and 1.2, have them enabled by default.
Q8. A vulnerability scan is reporting that patches are missing on a server. After a review, it is determined that the application requiring the patch does not exist on the operating system.
Which of the following describes this cause?
A. Application hardening
B. False positive
C. Baseline code review
D. False negative
Answer: B
Explanation:
False positives are essentially events that are mistakenly flagged and are not really events to be concerned about.
Q9. After a company has standardized to a single operating system, not all servers are immune to a well-known OS vulnerability. Which of the following solutions would mitigate this issue?
A. Host based firewall
B. Initial baseline configurations
C. Discretionary access control
D. Patch management system
Answer: D
Explanation:
Q10. An administrator needs to renew a certificate for a web server. Which of the following should be submitted to a CA?
A. CSR
B. Recovery agent
C. Private key
D. CRL
Answer: A
Explanation:
In public key infrastructure (PKI) systems, a certificate signing request (also CSR or certification
request) is a message sent from an applicant to a certificate authority in order to apply for a digital
identity certificate.
When you renew a certificate you send a CSR to the CA to get the certificate resigned.