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2021 Dec SY0-401 practice test
Q41. Protecting the confidentiality of a message is accomplished by encrypting the message with which of the following?
A. Sender's private key
B. Recipient's public key
C. Sender's public key
D. Recipient's private key
Answer: B
Explanation:
Q42. A database administrator contacts a security administrator to request firewall changes for a connection to a new internal application. The security administrator notices that the new application uses a port typically monopolized by a virus. The security administrator denies the request and suggests a new port or service be used to complete the application’s task. Which of the following is the security administrator practicing in this example?
A. Explicit deny
B. Port security
C. Access control lists
D. Implicit deny
Answer: C
Explanation:
Traffic that comes into the router is compared to ACL entries based on the order that the entries occur in the router. New statements are added to the end of the list. The router continues to look until it has a match. If no matches are found when the router reaches the end of the list, the traffic is denied. For this reason, you should have the frequently hit entries at the top of the list. There is an implied deny for traffic that is not permitted.
Q43. An administrator is looking to implement a security device which will be able to not only detect network intrusions at the organization level, but help defend against them as well. Which of the following is being described here?
A. NIDS
B. NIPS
C. HIPS
D. HIDS
Answer: B
Explanation:
Network-based intrusion prevention system (NIPS) monitors the entire network for suspicious traffic by analyzing protocol activity. The main functions of intrusion prevention systems are to identify malicious activity, log information about this activity, attempt to block/stop it, and report it
Q44. 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:
Q45. Which of the following protocols is used to authenticate the client and server’s digital certificate?
A. PEAP
B. DNS
C. TLS
D. ICMP
Answer: C
Explanation:
Transport Layer Security (TLS) is a cryptographic protocol designed to provide communications security over a computer network. It uses X.509 certificates and hence asymmetric cryptography to authenticate the counterparty with whom it is communicating, and to exchange a symmetric key.
Improved SY0-401 free download:
Q46. A security administrator has been tasked to ensure access to all network equipment is controlled by a central server such as TACACS+. This type of implementation supports which of the following risk mitigation strategies?
A. User rights and permissions review
B. Change management
C. Data loss prevention
D. Implement procedures to prevent data theft
Answer: A
Explanation:
Terminal Access Controller Access-Control System (TACACS, and variations like XTACACS and TACACS+) is a client/server-oriented environment, and it operates in a manner similar to RADIUS. Furthermore TACACS+ allows for credential to be accepted from multiple methods. Thus you can perform user rights and permission reviews with TACACS+.
Q47. A software developer is responsible for writing the code on an accounting application. Another software developer is responsible for developing code on a system in human resources. Once a year they have to switch roles for several weeks.
Which of the following practices is being implemented?
A. Mandatory vacations
B. Job rotation
C. Least privilege
D. Separation of duties
Answer: B
Explanation:
A job rotation policy defines intervals at which employees must rotate through positions.
Q48. An IT security technician needs to establish host based security for company workstations. Which of the following will BEST meet this requirement?
A. Implement IIS hardening by restricting service accounts.
B. Implement database hardening by applying vendor guidelines.
C. Implement perimeter firewall rules to restrict access.
D. Implement OS hardening by applying GPOs.
Answer: D
Explanation: Hardening is the process of securing a system by reducing its surface of vulnerability. Reducing the surface of vulnerability typically includes removing or disabling unnecessary functions and features, removing or disabling unnecessary user accounts, disabling unnecessary protocols and ports, and disabling unnecessary services. This can be implemented using the native security features of an operating system, such as Group Policy Objects (GPOs).
Q49. A network administrator is looking for a way to automatically update company browsers so they import a list of root certificates from an online source. This online source will then be responsible for tracking which certificates are to be trusted or not trusted. Which of the following BEST describes the service that should be implemented to meet these requirements?
A. Trust model
B. Key escrow
C. OCSP
D. PKI
Answer: A
Explanation:
In this scenario we can put a CA in the local network and use an online CA as root CA in a hierarchical trust model. A trust Model is collection of rules that informs application on how to decide the legitimacy of a Digital Certificate. In a hierarchical trust model, also known as a tree, a root CA at the top provides all of the information. The intermediate CAs are next in the hierarchy, and they trust only information provided by the root CA. The root CA also trusts intermediate CAs that are in their level in the hierarchy and none that aren’t. This arrangement allows a high level of control at all levels of the hierarchical tree.
Q50. Pete, the security engineer, would like to prevent wireless attacks on his network. Pete has implemented a security control to limit the connecting MAC addresses to a single port. Which of the following wireless attacks would this address?
A. Interference
B. Man-in-the-middle
C. ARP poisoning
D. Rogue access point
Answer: D
Explanation:
MAC filtering is typically used in wireless networks. In computer networking, MAC Filtering (or GUI filtering, or layer 2 address filtering) refers to a security access control method whereby the 48-bit address assigned to each network card is used to determine access to the network. MAC addresses are uniquely assigned to each card, so using MAC filtering on a network permits and denies network access to specific devices through the use of blacklists and whitelists.
In this question, a rogue access point would need to be able to connect to the network to provide access to network resources. If the MAC address of the rogue access point isn’t allowed to connect to the network port, then the rogue access point will not be able to connect to the network.