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2021 Jun security+ sy0-401 vce:
Q391. The server administrator has noted that most servers have a lot of free disk space and low memory utilization. Which of the following statements will be correct if the server administrator migrates to a virtual server environment?
A. The administrator will need to deploy load balancing and clustering.
B. The administrator may spend more on licensing but less on hardware and equipment.
C. The administrator will not be able to add a test virtual environment in the data center.
D. Servers will encounter latency and lowered throughput issues.
Answer: B
Explanation:
Migrating to a virtual server environment reduces cost by eliminating the need to purchase, manage, maintain and power physical machines. The fewer physical machines you have, the less money it costs.
Q392. 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.
Q393. Which of the following may significantly reduce data loss if multiple drives fail at the same time?
A. Virtualization
B. RAID
C. Load balancing
D. Server clustering
Answer: B
Explanation:
RAID, or redundant array of independent disks (RAID). RAID allows your existing servers to have more than one hard drive so that if the main hard drive fails, the system keeps functioning.
Q394. A system security analyst using an enterprise monitoring tool notices an unknown internal host exfiltrating files to several foreign IP addresses. Which of the following would be an appropriate mitigation technique?
A. Disabling unnecessary accounts
B. Rogue machine detection
C. Encrypting sensitive files
D. Implementing antivirus
Answer: B
Explanation:
Rogue machine detection is the process of detecting devices on the network that should not be there. If a user brings in a laptop and plugs it into the network, the laptop is a “rogue machine”. The laptop could cause problems on the network. Any device on the network that should not be there is classed as rogue.
Q395. Which of the following offers the LEAST amount of protection against data theft by USB drives?
A. DLP
B. Database encryption
C. TPM
D. Cloud computing
Answer: D
Explanation:
Cloud computing refers to performing data processing and storage elsewhere, over a network connection, rather than locally. Because users have access to the data, it can easily be copied to a USB device.
Avant-garde security+ + sy0-401:
Q396. A security administrator is segregating all web-facing server traffic from the internal network and restricting it to a single interface on a firewall. Which of the following BEST describes this new network?
A. VLAN
B. Subnet
C. VPN
D. DMZ
Answer: D
Explanation:
A DMZ or demilitarized zone (sometimes referred to as a perimeter network) is a physical or logical subnetwork that contains and exposes an organization's external-facing services to a larger and untrusted network, usually the Internet. The purpose of a DMZ is to add an additional layer of security to an organization's local area network (LAN); an external network node only has direct access to equipment in the DMZ, rather than any other part of the network. The name is derived from the term "demilitarized zone", an area between nation states in which military operation is not permitted.
Q397. Deploying a wildcard certificate is one strategy to:
A. Secure the certificate’s private key.
B. Increase the certificate’s encryption key length.
C. Extend the renewal date of the certificate.
D. Reduce the certificate management burden.
Answer: D
Explanation:
A wildcard certificate is a public key certificate which can be used with multiple subdomains of a domain. This saves money and reduces the management burden of managing multiple certificates, one for each subdomain.
A single Wildcard certificate for *.example.com, will secure all these domains: payment.example.com contact.example.com
login-secure.example.com
www.example.com
Because the wildcard only covers one level of subdomains (the asterisk doesn't match full stops),
these domains would not be valid for the certificate:
test.login.example.com
Q398. Failure to validate the size of a variable before writing it to memory could result in which of the following application attacks?
A. Malicious logic
B. Cross-site scripting
C. SQL injection
D. Buffer overflow
Answer: D
Explanation:
Q399. When reviewing a digital certificate for accuracy, which of the following would Matt, a security administrator, focus on to determine who affirms the identity of the certificate owner?
A. Trust models
B. CRL
C. CA
D. Recovery agent
Answer: C
Explanation:
A certificate authority (CA) is an organization that is responsible for issuing, revoking, and distributing certificates. The CA affirms the identity of the certificate owner.
Q400. An administrator wants to establish a WiFi network using a high gain directional antenna with a narrow radiation pattern to connect two buildings separated by a very long distance. Which of the following antennas would be BEST for this situation?
A. Dipole
B. Yagi
C. Sector
D. Omni
Answer: B
Explanation:
A Yagi-Uda antenna, commonly known simply as a Yagi antenna, is a directional antenna consisting of multiple parallel dipole elements in a line, usually made of metal rods. It consists of a single driven element connected to the transmitter or receiver with a transmission line, and additional parasitic elements: a so-called reflector and one or more directors. The reflector element is slightly longer than the driven dipole, whereas the directors are a little shorter. This design achieves a very substantial increase in the antenna's directionality and gain compared to a simple dipole.