CompTIA Security+ Question J-70

After Matt, a user, enters his username and password at the login screen of a web enabled portal, the following appears on his screen:
`Please only use letters and numbers on these fields’
Which of the following is this an example of?

A. Proper error handling
B. Proper input validation
C. Improper input validation
D. Improper error handling

Answer: B

Explanation:
Input validation is an aspect of secure coding and is intended to mitigate against possible user input attacks, such as buffer overflows and fuzzing. Input validation checks every user input submitted to the application before processing that input. The check could be a length, a character type, a language type, or a domain.

CompTIA Security+ Question J-69

A security engineer is reviewing log data and sees the output below:
POST: /payload.php HTTP/1.1
HOST: localhost
Accept: */*
Referrer: http://localhost/
******* HTTP/1.1 403 Forbidden
Connection: close
Log: Access denied with 403. Pattern matches form bypass Which of the following technologies was MOST likely being used to generate this log?

A. Host-based Intrusion Detection System
B. Web application firewall
C. Network-based Intrusion Detection System
D. Stateful Inspection Firewall
E. URL Content Filter

Answer: B

Explanation:
A web application firewall is a device, server add-on, virtual service, or system filter that defines a strict set of communication rules for a website and all visitors. It’s intended to be an application-specific firewall to prevent cross-site scripting, SQL injection, and other web application attacks.

CompTIA Security+ Question J-68

A security administrator must implement a wireless security system, which will require users to enter a 30 character ASCII password on their accounts. Additionally the system must support 3DS wireless encryption.
Which of the following should be implemented?

A. WPA2-CCMP with 802.1X
B. WPA2-PSK
C. WPA2-CCMP
D. WPA2-Enterprise

Answer: D

Explanation:
D: WPA-Enterprise is also referred to as WPA-802.1X mode, and sometimes just WPA (as opposed to WPA-PSK), this is designed for enterprise networks and requires a RADIUS authentication server. This requires a more complicated setup, but provides additional security

(e.g. protection against dictionary attacks on short passwords). Various kinds of the Extensible Authentication Protocol (EAP) are used for authentication. RADIUS can be managed centrally, and the servers that allow access to a network can verify with a RADIUS server whether an incoming caller is authorized. Thus the RADIUS server can perform all authentications. This will require users to use their passwords on their user accounts.

CompTIA Security+ Question J-67

Which of the following is a step in deploying a WPA2-Enterprise wireless network?

A. Install a token on the authentication server
B. Install a DHCP server on the authentication server
C. Install an encryption key on the authentication server
D. Install a digital certificate on the authentication server

Answer: D

Explanation:
When setting up a wireless network, you’ll find two very different modes of Wi-Fi Protected Access (WPA) security, which apply to both the WPA and WPA2 versions. The easiest to setup is the Personal mode, technically called the Pre-Shared Key (PSK) mode. It doesn’t require anything beyond the wireless router or access points (APs) and uses a single passphrase or password for all users/devices. The other is the Enterprise mode —which should be used by businesses and organizations—and is also known as the RADIUS, 802.1X, 802.11i, or EAP mode. It provides better security and key management, and supports other enterprise-type functionality, such as VLANs and NAP. However, it requires an external authentication server, called a Remote Authentication Dial In User Service (RADIUS) server to handle the 802.1X authentication of users.

To help you better understand the process of setting up WPA/WPA2-Enterprise and 802.1X, here’s the basic overall steps: Choose, install, and configure a RADIUS server, or use a hosted service.

Create a certificate authority (CA), so you can issue and install a digital certificate onto the RADIUS server, which may be done as a part of the RADIUS server installation and configuration. Alternatively, you could purchase a digital certificate from a public CA, such as GoDaddy or Verisign, so you don’t have to install the server certificate on all the clients. If using EAP-TLS, you’d also create digital certificates for each end-user. On the server, populate the RADIUS client database with the IP address and shared secret for each AP. On the server, populate user data with usernames and passwords for each end-user. On each AP, configure the security for WPA/WPA2-Enterprise and input the RADIUS server IP address and the shared secret you created for that particular AP. On each Wi-Fi computer and device, configure the security for WPA/WPA2-Enterprise and set the 802.1X authentication settings.

CompTIA Security+ Question J-66

A computer is put into a restricted VLAN until the computer’s virus definitions are up-to-date.
Which of the following BEST describes this system type?

A. NAT
B. NIPS
C. NAC
D. DMZ

Answer: C

Explanation:
Network Access Control (NAC) means controlling access to an environment through strict adherence to and implementation of security policies. The goals of NAC are to prevent/reduce zero-day attacks, enforce security policy throughout the network, and use identities to perform access control.

CompTIA Security+ Question J-65

A firewall technician has been instructed to disable all non-secure ports on a corporate firewall. The technician has blocked traffic on port 21, 69, 80, and 137-139. The technician has allowed traffic on ports 22 and 443. Which of the following correctly lists the protocols blocked and allowed?

A. Blocked: TFTP, HTTP, NetBIOS; Allowed: HTTPS, FTP
B. Blocked: FTP, TFTP, HTTP, NetBIOS; Allowed: SFTP, SSH, SCP, HTTPS
C. Blocked: SFTP, TFTP, HTTP, NetBIOS; Allowed: SSH, SCP, HTTPS
D. Blocked: FTP, HTTP, HTTPS; Allowed: SFTP, SSH, SCP, NetBIOS

Answer: B

Explanation:
The question states that traffic on port 21, 69, 80, and 137-139 is blocked, while ports 22 and 443 are allowed.

Port 21 is used for FTP by default. Port 69 is used for TFTP. Port 80 is used for HTTP. Ports 137-139 are used for NetBIOS. VMM uses SFTP over default port 22. Port 22 is used for SSH by default. SCP runs over TCP port 22 by default. Port 443 is used for HTTPS.

CompTIA Security+ Question J-64

An administrator is building a development environment and requests that three virtual servers are cloned and placed in a new virtual network isolated from the production network. Which of the following describes the environment the administrator is building?

A. Cloud
B. Trusted
C. Sandbox
D. Snapshot

Answer: C

Explanation:
Sandboxing is the process of isolating a system before installing new applications on it so as to restrict any potential malware that may be embedded in the new application from being able to cause harm to production systems.

CompTIA Security+ Question J-63

Ann, the Chief Information Officer (CIO) of a company, sees cloud computing as a way to save money while providing valuable services. She is looking for a cost-effective solution to assist in capacity planning as well as visibility into the performance of the network. Which of the following cloud technologies should she look into?

A. IaaS
B. MaaS
C. SaaS
D. PaaS

Answer: B

Explanation:
Monitoring-as-a-service (MaaS) is a cloud delivery model that falls under anything as a service (XaaS). MaaS allows for the deployment of monitoring functionalities for several other services and applications within the cloud.

CompTIA Security+ Question J-62

The method to provide end users of IT systems and applications with requirements related to acceptable use, privacy, new threats and trends, and use of social networking is:

A. Security awareness training.
B. BYOD security training.
C. Role-based security training.
D. Legal compliance training.

Answer: A

Explanation:
Security awareness and training are critical to the success of a security effort. They include explaining policies, procedures, and current threats to both users and management.

CompTIA Security+ Question J-61

A network engineer is setting up a network for a company. There is a BYOD policy for the employees so that they can connect their laptops and mobile devices.
Which of the following technologies should be employed to separate the administrative network from the network in which all of the employees’ devices are connected?

A. VPN
B. VLAN
C. WPA2
D. MAC filtering

Answer: B

Explanation:
A virtual local area network (VLAN) is a hardware-imposed network segmentation created by switches. VLANs are used for traffic management. Communications between ports within the same VLAN occur without hindrance, but communications between VLANs require a routing function.