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2021 Apr SY0-401 exam answers
Q491. Which of the following devices is MOST likely being used when processing the following?
1 PERMIT IP ANY ANY EQ 80
2 DENY IP ANY ANY
A. Firewall
B. NIPS
C. Load balancer
D. URL filter
Answer: A
Explanation:
Firewalls, routers, and even switches can use ACLs as a method of security management. An access control list has a deny ip any any implicitly at the end of any access control list. ACLs deny by default and allow by exception.
Q492. A financial company requires a new private network link with a business partner to cater for realtime and batched data flows.
Which of the following activities should be performed by the IT security staff member prior to establishing the link?
A. Baseline reporting
B. Design review
C. Code review
D. SLA reporting
Answer: B
Explanation:
This question is asking about a new private network link (a VPN) with a business partner. This will
provide access to the local network from the business partner.
When implementing a VPN, an important step is the design of the VPN. The VPN should be
designed to ensure that the security of the network and local systems is not compromised.
The design review assessment examines the ports and protocols used, the rules, segmentation,
and access control in the systems or applications. A design review is basically a check to ensure
that the design of the system meets the security requirements.
Q493. 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
Q494. Which of the following, if properly implemented, would prevent users from accessing files that are unrelated to their job duties? (Select TWO).
A. Separation of duties
B. Job rotation
C. Mandatory vacation
D. Time of day restrictions
E. Least privilege
Answer: A,E
Explanation:
Q495. A customer has provided an email address and password to a website as part of the login process. Which of the following BEST describes the email address?
A. Identification
B. Authorization
C. Access control
D. Authentication
Answer: A
Improve SY0-401 exam question:
Q496. Which of the following tools would allow Ann, the security administrator, to be able to BEST quantify all traffic on her network?
A. Honeypot
B. Port scanner
C. Protocol analyzer
D. Vulnerability scanner
Answer: C
Explanation:
A Protocol Analyzer is a hardware device or more commonly a software program used to capture
network data communications sent between devices on a network. By capturing and analyzing the
packets sent between the systems on the network, Ann would be able to quantify the amount of
traffic on the network.
Well known software protocol analyzers include Message Analyzer (formerly Network Monitor)
from Microsoft and Wireshark (formerly Ethereal).
Q497. Which of the following documents outlines the technical and security requirements of an agreement between organizations?
A. BPA
B. RFQ
C. ISA
D. RFC
Answer: C
Explanation:
Q498. Joe, an employee is taking a taxi through a busy city and starts to receive unsolicited files sent to his Smartphone. Which of the following is this an example of?
A. Vishing
B. Bluejacking
C. War Driving
D. SPIM
E. Bluesnarfing
Answer: B
Explanation:
Bluejacking is the sending of unsolicited messages over Bluetooth to Bluetooth-enabled devices such as mobile phones, PDAs or laptop computers, sending a vCard which typically contains a message in the name field (i.e., for bluedating or bluechat) to another Bluetooth-enabled device via the OBEX protocol. Bluetooth has a very limited range, usually around 10 metres (32.8 ft) on mobile phones, but laptops can reach up to 100 metres (328 ft) with powerful (Class 1) transmitters. Bluejacking is usually harmless, but because bluejacked people generally don't know what has happened, they may think that their phone is malfunctioning. Usually, a bluejacker will only send a text message, but with modern phones it's possible to send images or sounds as well. Bluejacking has been used in guerrilla marketing campaigns to promote advergames.
Q499. Which of the following controls would allow a company to reduce the exposure of sensitive systems from unmanaged devices on internal networks?
A. 802.1x
B. Data encryption
C. Password strength
D. BGP
Answer: A
Explanation:
IEEE 802.1X (also known as Dot1x) is an IEEE Standard for Port-based Network Access Control (PNAC). It is part of the IEEE 802.1 group of networking protocols. It provides an authentication mechanism to devices wishing to attach to a LAN or WLAN.
802.1X authentication involves three parties: a supplicant, an authenticator, and an authentication server. The supplicant is a client device (such as a laptop) that wishes to attach to the LAN/WLAN
-though the term 'supplicant' is also used interchangeably to refer to the software running on the client that provides credentials to the authenticator. The authenticator is a network device, such as an Ethernet switch or wireless access point; and the authentication server is typically a host running software supporting the RADIUS and EAP protocols. The authenticator acts like a security guard to a protected network. The supplicant (i.e., client device) is not allowed access through the authenticator to the protected side of the network until the supplicant’s identity has been validated and authorized. An analogy to this is providing a valid visa at the airport's arrival immigration before being allowed to enter the country. With 802.1X port-based authentication, the supplicant provides credentials, such as user name/password or digital certificate, to the authenticator, and the authenticator forwards the credentials to the authentication server for verification. If the authentication server determines the credentials are valid, the supplicant (client device) is allowed to access resources located on the protected side of the network.
Q500. A security administrator is concerned about the strength of user’s passwords. The company does not want to implement a password complexity policy. Which of the following can the security Administrator implement to mitigate the risk of an online password attack against users with weak passwords?
A. Increase the password length requirements
B. Increase the password history
C. Shorten the password expiration period
D. Decrease the account lockout time
Answer: C
Explanation:
Reducing the password expiration period will require passwords to be changed at the end of that period. A password needs to be changed if it doesn’t meet the compliance requirements of the company’s password policy, or is evidently insecure. It will also need to be changed if it has been reused, or due to possible compromise as a result of a system intrusion. This will give online password attackers less time to crack the weak passwords.