FC0-U51 Online Practice Questions and Answers

Correct Answer: C

Correct Answer: B

Correct Answer: C

Correct Answer: CE

Correct Answer: ABD

The DVI-D is a type of DVI connector. This connector is used only for digital signal connections. DVI-D connectors come in dual and single links. The dual link connector contains 24 pins, whereas the single link connector comes with 18 pins.

DVI stands for Digital Visual Interface. It is a standard for high speed, high resolution digital display invented by Digital Display Working Group (DDWG). DVI accommodates analog and digital interfaces with a single connector. New video

cards have DVI as well as VGA ports built into them. Most of LCD monitors come with a 15-pin VGA connection cable, even if they are capable of handling digital signals coming from DVI connections. However, some monitors come with both

types of cables. DVI has three main categories of connectors. They are: DVI-A, DVI-D, and DVI-I. DVI-A is an analog-only connector, DVI-D is a digital-only connector, and DVI-I is an analog/digital connector. DVI-D and DVI-I connectors are

of two types: single link and dual link. DVI supports UXGA and HDTV with a single set of links. Higher resolutions such as 1920 x 1080, 2048 x 1536, or more can be supported with dual links.

Answer option C is incorrect. The DVI-I connector supports both digital and analog signal connections.

Reference: "http://en.wikipedia.org/wiki/DVI"

Correct Answer: D

The /? switch with a command is used to get a brief description of the command usage and its switches.

Answer options C, B, and A are incorrect. These command switches are not used for getting a brief description of a command.

Correct Answer: A

An IEEE 1394 port can connect upto 63 devices. This port is also known as FireWire.

What is the IEEE1394 connector?

The IEEE1394 (FireWire) connector is used with the FireWire serial bus. FireWire can transmit data at a very high speed of 400Mbps and 800Mbps. Two types of connectors are available in this category, namely 4-pin and 6-pin. Answer

option B is incorrect. A single USB port can be used to connect upto 127 peripheral devices.

Reference: TechNet, Contents: "http://www.webopedia.com/TERM/I/IEEE_1394.html"

Correct Answer: A

Pop-up ads or pop-ups are a form of online advertising on the World Wide Web intended to attract Web traffic or capture email addresses. It works when certain Web sites open a new Web browser window to display advertisements. The pop-up window containing an advertisement is usually generated by JavaScript, but can be generated by other means as well. Answer option C is incorrect. A cookie is a small bit of text that accompanies requests and pages as they move between Web servers and browsers. It contains information that is read by a Web application, whenever a user visits a site. Cookies are stored in the memory or hard disk of client computers. A Web site stores information, such as user preferences and settings in a cookie. This information helps in providing customized services to users. There is absolutely no way a Web server can access any private information about a user or his computer through cookies, unless a user provides the information. A Web server cannot access cookies created by other Web servers. Answer option B is incorrect. Signed script policy is a policy in which testing is required to check the identity of a user sending requests from a Web browser. In this policy, when a receiver receives a request from the user to access some resources of his computer, he can grant or deny the access on the basis of whether the request is coming from a trusted or a non-trusted source. If the receiver permits the request, the code will run on the browser after further checks. An author converts the code in the form of an encrypted text, which is recreated on the browser as a simple text. The code will not run on the browser if there is any modification in the text. Answer option D is incorrect. A Java applet is a software program written in Java language. It is distributed as an attachment in a Web document and executed in a Java-enabled Web browser. Java applets can run on almost any operating system without requiring recompilation.

Correct Answer: ABC

The following are types of access control attacks : 1.Spoofing 2.Brute force attack 3.Dictionary attack 4.Denial of service attack What is spoofing? Spoofing is a technique that makes a transmission appear to have come from an authentic source by forging the IP address, email address, caller ID, etc. In IP spoofing, a hacker modifies packet headers by using someone else's IP address to his identity. However, spoofing cannot be used while surfing the Internet, chatting on-line, etc. because forging the source IP address causes the responses to be misdirected.

What is dictionary attack?

Dictionary attack is a type of password guessing attack. This type of attack uses a dictionary of common words to find out the password of a user. It can also use common words in either upper or lower case to find a password. There are

many programs available on the Internet to automate and execute dictionary attacks.

What is a brute force attack?

In a brute force attack, an attacker uses software that tries a large number of the keys combinations in order to get a password. To prevent such attacks, users should create passwords more difficult to guess, e.g., using a minimum of six

characters, alphanumeric combinations, and lower-upper case combinations, etc. Answer option B is incorrect. Mail bombing is not a type of access control attack. Mail bombing is an attack that is used to overwhelm mail servers and clients

by sending large amount of unwanted e-mails. The aim of this type of attack is to completely fill the recipient's hard disk with immense, useless files, causing at best irritation, and at worst total computer failure. E-mail filtering and properly

configuring email relay functionality on mail servers can be helpful for protection against this type of attack.

Correct Answer: A

Universal Serial Bus (USB) is a high speed bus standard developed by Compaq, IBM, DEC, Intel, Microsoft, NEC, and Northern Telecom. It provides the Plug and Play capability of Windows to external hardware devices. USB supports hot plugging, which means that a USB device can be installed or removed while the computer is running. A single USB port can be used to connect up to 127 peripheral devices, such as CD-ROM drives, tape drives, keyboards, scanners etc. USB 1.1 has a maximum data transfer rate of 12 Mbps, whereas USB 2.0 has a maximum data transfer rate of 480 Mbps. USB 2.0 is fully backward compatible with USB 1.1. Answer option D is incorrect. Software drivers are required for USB devices. It is possible, though, that the drivers for your USB devices are already available on the computer. In this case, you do not need to provide a device driver separately. Answer option B is incorrect. It is not required to restart the computer to install USB devices. Reference: TechNet, Contents: "Universal Serial Bus Support for Windows CE"