Internet & Multimedia Second Year 2012

The given correct answer, "who.is," suggests that the service "who.is" is used to obtain information about the domain name of a website.

The website www.whatismyipaddress.com is used to determine the IP address of your device.

A modem is a device that connects a computer to a telephone network by converting digital signals from the computer into analog signals that can be transmitted over telephone lines, and vice versa. It performs the function of translating the digital data from the computer into a format that can be transmitted over the analog telephone lines, and also converts the analog signals received from the telephone lines back into digital data that the computer can understand. Therefore, a modem is the correct answer in this case.

The correct answer is "البت bit". In computer memory, a bit is the smallest unit of data representation. It can have a value of either 0 or 1, representing the binary system used in computers. Other options like byte, kilobyte, and megabyte are larger units of data storage, with a byte being composed of 8 bits. Therefore, the bit is the smallest unit of measurement for data representation in memory.

In Arabic, the statement "تعتبر المعلومات متغير تابع للبيانات" translates to "Information is considered a dependent variable of data." This statement implies that information is derived or dependent on data. Therefore, the correct answer is "True."

The statement "المودم بسرعة 14.4 كيلوبايت /ثانية أبطىء من المودم 56.6 كيلوبايت/ثانية" is correct because it states that a modem with a speed of 14.4 kilobits/second is slower than a modem with a speed of 56.6 kilobits/second. This is true as the higher the speed of the modem, the faster the data transmission.

The correct answer is "Data". The term "بيانات" refers to raw facts, figures, or statistics that are collected and stored. Data by itself does not have any meaning or context. It is the building block for knowledge and information. Data needs to be processed and analyzed to extract meaningful insights and create knowledge. Once data is organized, interpreted, and contextualized, it becomes information that can be used for decision-making and understanding. Therefore, data is the foundation upon which knowledge and information are built.

The given statement suggests that entering incorrect data leads to errors in computer work, which is attributed to deficiencies in the computer itself. However, this statement is false. Entering incorrect data can indeed result in errors in computer work, but these errors are not caused by deficiencies in the computer. The errors are typically a result of human error or incorrect input, rather than a fault in the computer system.

The correct answer describes the internet as a collection of computer files around the world connected together by links. This accurately reflects the nature of the internet as a global network of interconnected computers and files.

The correct answer is "Electronic". The letter "E" in the word "E-mail" stands for "Electronic". E-mail is short for electronic mail, which refers to the exchange of digital messages over the internet.

The statement suggests that the Information Technology revolution has been divided into three stages: electronic information processing, administrative information systems, and the internet. This implies that the revolution has progressed through these stages in chronological order. Therefore, the correct answer is true.

The given question states that we want to transfer an image with a size of 2,520,000 bits using a modem that transfers data at a speed of 56 Kbps. To calculate the time it takes to transfer the image, we divide the size of the image by the speed of the modem.

2,520,000 bits ÷ 56,000 bits per second = 45 seconds

Therefore, it will take 45 seconds to transfer the image.

LAN (Local Area Network) is a type of network that connects computers within a small geographical area, such as a home, office, or school. It allows for the sharing of resources, such as files, printers, and internet connections, among the connected devices. LANs are typically faster and more secure than wide area networks (WANs) or the internet, which makes them suitable for local communication and collaboration purposes.

The given statement is false. The MAC address consists of 6 sections, not 4. Each section is represented by a pair of hexadecimal digits, separated by colons or hyphens. The MAC address is a unique identifier assigned to network interfaces for communication on a network.

WAN (Wide Area Network) is a type of network that connects devices across different cities and countries. LAN (Local Area Network) is a type of network that connects devices within a limited area, such as a home or office. Ethernet is a technology used to connect devices within a network, but it does not specify the geographical scope of the network. Therefore, the correct answer is WAN.

Firewall is a security measure that helps protect a network or computer system from unauthorized access from external sources. It acts as a barrier between the internal network and the outside world, filtering incoming and outgoing network traffic based on predetermined security rules. By doing so, it prevents unauthorized access attempts from reaching the internal network, thus ensuring the security of the internet. Therefore, the statement "حوائط المنع تقوم بحماية الانترنت من محاولات الوصول غير المرخص من الخارج" is true.

The correct answer describes the internet as a network of computer files connected together by links. This accurately represents the concept of the internet as a global network of interconnected computers and files. The other options do not fully capture the scope and nature of the internet.

ISDN (Integrated Services Digital Network) is a digital telecommunications network that can transmit both voice and data signals simultaneously. It allows for the integration of various communication services, such as telephone, fax, and computer networks, over a single digital line. Therefore, ISDN is the correct answer as it is the only option that supports both voice and data transmission. FTP (File Transfer Protocol), HTTP (Hypertext Transfer Protocol), and PSTN (Public Switched Telephone Network) are not designed to handle both voice and data simultaneously.

Domain name translation to IP addresses and vice versa is indeed done by consulting a DNS (Domain Name System) server. DNS servers maintain a database of domain names and their corresponding IP addresses. When a user enters a domain name in their web browser, the DNS server is queried to retrieve the IP address associated with that domain name. This IP address is then used to establish a connection and retrieve the desired web page. Similarly, when translating an IP address to a domain name, the DNS server is consulted to retrieve the corresponding domain name.

The statement is false because the information technology revolution is typically divided into multiple stages or phases, not just two. This division allows for a better understanding of the evolution and progress of technology over time.

ADSL stands for Asymmetric Digital Subscriber Line, which refers to a type of digital communication technology that allows high-speed data transmission over traditional telephone lines. The term "asymmetric" indicates that the download speed is typically faster than the upload speed. This technology is commonly used for internet access in residential and small business settings.

The given statement is false. Media Access Control (MAC) address is a unique identifier assigned to network interfaces for communications on the physical network segment. It is a hardware address that is assigned by the manufacturer and is used to uniquely identify devices on a network.

The correct answer states that "You need a license to publish materials on the internet." This statement is incorrect because, in most cases, you do not need a license to publish materials on the internet. While there may be certain restrictions or regulations regarding copyrighted material, the general act of publishing content on the internet does not require a license.

The given answer is False. DHCP (Dynamic Host Configuration Protocol) is not used to assign static IP addresses. DHCP is a network protocol that is used to automatically assign IP addresses to devices on a network. It dynamically assigns IP addresses from a pool of available addresses. Static IP addresses, on the other hand, are manually configured and do not change.

The given correct answer is "True" because the statement "سرعتها تقل عن (upload) فى خطوط الأتصال ADSL" translates to "Its speed is lower than upload in ADSL connections." This statement implies that the download speed is slower than the upload speed in ADSL connections, which is true.

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The given statement is false because the term "Dynamic IP" refers to an IP address that is assigned to a device temporarily and can change over time. It does not have a long expiration period. Therefore, the IP address mentioned in the question cannot be a Dynamic IP with a long validity period.

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