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NEW QUESTION: 1
Which of the following is the below pseudo-code an example of?
IF VARIABLE (CONTAINS NUMBERS = TRUE) THEN EXIT
A. Buffer overflow prevention
B. CSRF prevention
C. Input validation
D. Cross-site scripting prevention
Answer: C
Explanation:
Input validation is a defensive technique 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.
Incorrect Answers:
A. Buffer overflow is an exploit at programming error, bugs and flaws. It occurs when an application is fed more input data than it is programmed to handle. This may cause the application to terminate or to write data beyond the end of the allocated space in memory. The termination of the application may cause the system to send the data with temporary access to privileged levels in the system, while overwriting can cause important data to be lost. Proper error and exception handling and input validation will help prevent Buffer overflow exploits.
C. XSRF or cross-site request forgery applies to web applications and is an attack that exploits the web application's trust of a user who known or is supposed to have been authenticated. This is often accomplished without the user's knowledge.
XSRF can be prevented by adding a randomization string (called a nonce) to each URL request and session establishment and checking the client HTTP request header referrer for spoofing.
D. Cross-site scripting (XSS) is a form of malicious code-injection attack on a web server in which an attacker injects code into the content sent to website visitors. XSS can be mitigated by implementing patch management on the web server, using firewalls, and auditing for suspicious activity.
References:
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 257,
338
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 192, 197, 319, 320
NEW QUESTION: 2
A. Option B
B. Option A
C. Option D
D. Option C
Answer: C,D
NEW QUESTION: 3
Which of the following actions will you perform to accomplish the task?
Each correct answer represents a complete solution. Choose all that apply.
A. Using group policies, configure the network to allow the wireless computers to connect to the ad hoc networks only.
B. Implement the IEEE 802.1X authentication for the wireless network.
C. Configure the wireless network to use WEP encryption for the data transmitted over a wireless network.
D. Implement the open system authentication for the wireless network.
E. Using group policies, configure the network to allow the wireless computers to connect to the infrastructure networks only.
Answer: B,C,E
Explanation:
In order to enable wireless networking, you have to install access points in various areas of your office building. These access points generate omni directional signals to broadcast network traffic. Unauthorized users can intercept these packets. Hence, security is the major concern for a wireless network. The two primary threats are unauthorized access and data interception. In order to accomplish the task, you will have to take the following steps: Using group policies, configure the network to allow the wireless computers to connect to the infrastructure networks only. This will prevent the sales team members from communicating directly to one another. Implement the IEEE 802.1X authentication for the wireless network. This will allow only authenticated users to access the network data and resources. Configure the wireless network to use WEP encryption for data transmitted over a wireless network. This will encrypt the network data packets transmitted over wireless connections. Although WEP encryption does not prevent intruders from capturing the packets, it prevents them from reading the data inside. Fact What is infrastructure network? Hide Infrastructure is a basic topology of a wireless network. An infrastructure network consists of an access point that connects wireless devices to the standard cable network. An access point is connected to the cabled network through a cable and it generates omni directional signals. When wireless devices come within the range of the access point, they are able to communicate with the cabled local area network. The access point works as a central bridge device to include wireless devices in the cabled LAN. FactWhat is IEEE 802.1X authentication? Hide The IEEE 802.1X standard defines a method of authenticating and authorizing users to connect to an IEEE 802 LAN. It blocks users from accessing the network on the failure of authentication. IEEE 802.1X supports the Extensible Authentication Protocol-Transport Level Security (EAP-TLS) and Protected EAP-Microsoft Challenge Handshake Authentication Protocol version 2 (PEAP-MS-CHAP v2) protocols. In the IEEE802.1X authentication system, an access point receives a connection request from a wirelessclient and forwards the request to the RADIUS server. The RADIUS server then uses the Active Directory database to determine whether the client should be granted access to the network. Fact What is WEP? Hide Wired Equivalent Privacy (WEP) is a security protocol for wireless local area networks (WLANs). It has two components, authentication and encryption. It provides security, which is equivalent to wired networks, for wireless networks. WEP encrypts data on a wireless network by using a fixed secret key. WEP incorporates a checksum in each frame to provide protection against the attacks that attempt to reveal the key stream. Answer option E is incorrect. Open System authentication is the default authentication method used by 802.11 devices. But, in fact, it provides no authentication at all. It exchanges messages between the two wireless devices without using any password or keys. A device configured to use the Open System authentication cannot refuse to authenticate another device. Answer option D is incorrect. The ad hoc networks enable users to communicate directly to one another, whereas the question clearly states that you should prevent the sales team members from communicating directly to one another. Fact What is ad hoc network? Hide Ad hoc is a basic topology of a wireless network. An ad hoc network consists of two or more wireless devices that communicate directly with each other. The wireless local area network (WLAN) network interface adapters in the wireless devices generate omni directional signals within a limited range called basic service area (BSA). When two wireless devices come within the range of each other, they immediately form a two-node network and are able to communicate with each other. An ad hoc network is non-transitive.
Reference: Windows Help Contents: "Wireless networking"